Western Asset Mortgage Opportunity Fund (NYSE: DMO) posts 10.6% NAV return in 2025

Q: How much did DMO distribute to shareholders in 2025 and what portion was return of capital?

DMO made total distributions of $1.55 per share during the fiscal year ended December 31, 2025, of which $0.38 per share is characterized as a return of capital for tax purposes.

Q: What are DMO's largest portfolio exposures as of December 31, 2025?

The schedule shows Residential MBS at 112.7% and Commercial MBS at 49.3% of total investments (percentages shown based on Fund net assets). The Fund also holds asset-backed securities, CLOs, preferreds and corporate debt.

Q: Does DMO use leverage or derivatives and how significant are those positions?

Yes. Leverage ranged from roughly 45% to 48% of total assets during the period. The Fund records significant reverse repurchase agreements totaling $123,196,000 and reports open futures contracts and CDS activity in the notes and schedule.

Q: Which holdings contributed and detracted from DMO's 2025 performance?

Contributors included investment-grade non-agency RMBS , legacy and new-issue RMBS, CRTs, new-issue CMBS and ABS. Detractors included issue selection within high-yield REITs , and aggregate use of derivatives reduced performance.

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

N-CSR

Rhea-AI Filing Summary

Western Asset Mortgage Opportunity Fund Inc. reported its annual shareholder report for the year ended December 31, 2025. The Fund returned 10.57% based on NAV and 6.85% based on market price for the twelve months ended December 31, 2025. The Fund paid total distributions of $1.55 per share, of which $0.38 is characterized as a return of capital for tax purposes.

The portfolio is concentrated in mortgage-related assets, showing Residential MBS at 112.7% and Commercial MBS at 49.3% of total investments (percentages shown based on Fund net assets). The Fund used leverage (roughly 45% to 48% of total assets during the period), reverse repurchase agreements, futures and CDS; derivatives in aggregate detracted from performance while leverage contributed amid positive asset returns.

Insights

Fund delivered strong NAV return driven by mortgage spread and credit positioning.

The Fund reported a 10.57% NAV total return for the year ended December 31, 2025, outperforming its ICE BofA benchmark which returned 5.58%. Performance contributors included investment-grade non-agency RMBS, legacy and new-issue RMBS, CRTs, new-issue CMBS and ABS exposure, per the report.

Key dependencies include future mortgage spread behavior, prepayment patterns and the durability of CRE credit fundamentals. Subsequent performance will hinge on the Fund’s ongoing allocation between investment-grade and below-investment-grade RMBS and the managers’ use of leverage and derivatives; timing not specified in the excerpt.

Portfolio concentration in mortgage and structured credit increases sensitivity to credit and interest-rate moves.

The schedule shows high allocations to RMBS (112.7%) and CMBS (49.3%) with material positions in structured agency credit risk and seasoned CRTs. The Fund disclosed exposure to below investment grade securities and whole loans (whole loans limited to 20% under normal circumstances), and notable use of leverage via reverse repurchase agreements totaling $123,196,000 at period end.

Risks to watch include credit selection in high-yield REITs (noted as a detractor), leverage volatility, and derivative counterparty exposures documented in the reverse repurchase and futures tables. Cash-flow treatment and counterparty specifics are disclosed in the Schedule of Investments and notes.

03/02/2026 - 06:34 AM

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED
MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-22369

Western Asset Mortgage Opportunity Fund Inc.

(Exact name of registrant as specified in charter)

One Madison Avenue, 17th Floor, New York, NY 10010

(Address of principal executive offices) (Zip code)

Marc A. De Oliveira

Franklin Templeton

100 First Stamford Place

Stamford, CT 06902

(Name and address of agent for service)

Registrant’s telephone number, including area code: 1-888-777-0102

Date of fiscal year end: December 31

Date of reporting period: December 31, 2025

ITEM 1.

REPORT TO STOCKHOLDERS

(a) The Report to Shareholders is filed herewith

Annual Report

December 31, 2025

WESTERN ASSET
MORTGAGE OPPORTUNITY FUND INC.
(DMO)

Fund objectives

The Fund’s primary investment objective is to provide current income. As a secondary investment objective, the Fund will seek capital appreciation.

The Fund seeks to achieve its investment objectives by investing primarily in a diverse portfolio of mortgage-backed securities and mortgage whole loans. Investments in mortgage-backed securities consist primarily of non-agency residential mortgage-backed securities and commercial mortgage-backed securities.

What’s inside

Letter from the president	III
Fund overview	1
Fund at a glance	6
Fund performance	7
Schedule of investments	9
Statement of assets and liabilities	27
Statement of operations	28
Statements of changes in net assets	29
Statement of cash flows	30
Financial highlights	31
Notes to financial statements	34
Report of independent registered public accounting firm	50
Additional shareholder information	51
Additional information	52
Annual chief executive officer and principal financial officer certifications	58
Other shareholder communications regarding accounting matters	59
Important information to shareholders	60
Summary of information regarding the Fund	63
Dividend reinvestment plan	106
Important tax information	108

Western Asset Mortgage Opportunity Fund Inc.

Letter from the president

Dear Shareholder,

We are pleased to provide the annual report of Western Asset Mortgage Opportunity Fund Inc. for the twelve-month reporting period ended December 31, 2025. Please read on for a detailed look at prevailing economic and market conditions during the Fund’s reporting period and to learn how those conditions have affected Fund performance.

Special shareholder notice

Effective January 27, 2026, the named portfolio management team responsible for the day-to-day oversight of Western Asset Mortgage Opportunity Fund Inc. (the “Fund”) is as follows: Michael Buchanan, Greg Handler, Simon Miller and Liam Lynch.

As always, we remain committed to providing you with excellent service and a full spectrum of investment choices. We also remain committed to supplementing the support you receive from your financial advisor. One way we accomplish this is through our website, www.franklintempleton.com. Here you can gain immediate access to market and investment information, including:

•

Fund prices and performance,

•

Market insights and commentaries from our portfolio managers, and

•

A host of educational resources.

We look forward to helping you meet your financial goals.

Sincerely,

Jane Trust, CFA

President and Chief Executive Officer

January 30, 2026

Western Asset Mortgage Opportunity Fund Inc.

III

(This page intentionally left blank.)

Fund overview

Q. What is the Fund’s investment strategy?

A. The Fund’s primary investment objective is to provide current income. As a secondary investment objective, the Fund will seek capital appreciation. The Fund seeks to achieve its investment objectives by investing primarily in a diverse portfolio of mortgage-backed securities (MBS) and mortgage whole loans. Investments in MBS consist primarily of residential mortgage-backed securities (RMBS) and commercial mortgage-backed securities (CMBS). The Fund’s investments in mortgage whole loans under normal circumstances will not exceed 20% of its managed assets.

The Fund also may invest, to a lesser degree, in other permitted investments, including cash and cash equivalents; Treasury securities; non-mortgage related asset-backed securities (ABS) backed by various asset classes including, but not limited to, small balance commercial mortgages, aircrafts, automobiles, credit cards, equipment, manufactured housing, franchises, recreational vehicles and student loans; and investment grade and below investment grade fixed income securities including bonds, debentures, notes, commercial paper and other similar types of debt instruments including hybrid securities. The Fund also may invest in any newly developed mortgage-related derivatives that may hereafter become available for mortgage investing.

The Fund may invest in derivative instruments, such as options contracts, futures contracts, options on futures contracts, indexed securities, credit linked notes, credit default swaps and other swap agreements for investment, hedging and risk management purposes with certain limitations. Notwithstanding the foregoing, the Fund may invest without limitation in Treasury futures, Eurodollar futures, interest rate swaps, swaptions or similar instruments and combinations thereof.

The Fund is not limited in its ability to invest in below investment grade (commonly referred to as “high yield” or “junk” securities) or illiquid securities. Below investment grade securities are securities rated below the Baa3 or BBB- categories at the time of purchase by one or more nationally recognized statistical rating organizations or unrated securities that we determined to be of comparable credit quality.

At Western Asset Management Company, LLC (Western Asset), the Fund’s subadviser, we utilize a fixed income team approach, with decisions derived from interaction among various investment management sector specialists. The sector teams are comprised of Western Asset’s senior portfolio management personnel, research analysts and an in-house economist. Under this team approach, management of client fixed income portfolios will reflect a consensus of interdisciplinary views within the Western Asset organization. The individuals responsible for development of investment strategy, day-to-day portfolio management, oversight and coordination of the Fund are Michael Buchanan, Greg Handler, Simon Miller and Liam Lynch.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Fund overview (cont’d)

Q. What were the overall market conditions during the Fund’s reporting period?

A. The overall U.S. fixed income market experienced periods of volatility but generated a solid return over the twelve-months ended December 31, 2025. The market was driven by several factors, including mixed economic data, moderating but “sticky” inflation, shifting U.S Federal Reserve (Fed) monetary policy, a trade tensions between the U.S. and its trading partners, a 43-day government shutdown, and several geopolitical issues.

Looking back, the Fed lowered interest rates in September 2024 (the first reduction since 2020) and again in November and December 2024. The December reduction put the federal funds target rate at 4.25%-4.50%, the lowest level since December 2022. The Fed then remained on hold at its first five meetings in 2025, as it weighed the impact of the U.S. President’s tariffs on the economy and inflation. The Fed then lowered rates at its September, October and December 2025 meetings, citing concerns over the labor market.

Both short- and long-term U.S. Treasury yields declined during the reporting period. The two-year U.S. Treasury yield began the period at 4.25% and ended at 3.47%, whereas the ten-year U.S. Treasury yield began the period at 4.58% and ended at 4.18%.

The overall agency RMBS market posted a strong return during the reporting period. For the twelve months ended December 31, 2025, the overall agency MBS market, as measured by the Bloomberg U.S. Mortgage-Backed Securities Indexi, returned 8.58%.

Q. How did we respond to these changing market conditions?

A. A number of adjustments were made to the Fund during the reporting period. The Fund’s portfolio increased its holdings of investment-grade non-agency residential mortgage-backed securities (NARMBS), while reducing exposure to below investment-grade non-agency RMBS and credit risk transfer (CRT) securities. Within CMBS, the Fund’s portfolio trimmed conduit positions and added to commercial real estate collateralized loan obligations (CRECLOs). Additional allocations were made to agency collateralized mortgage obligations (CMOs), while ABS holdings were reduced.

During the reporting period, we utilized interest rate U.S. Treasury futures and options to manage the Fund’s duration and yield curve exposure. The Fund also used credit default swaps and written options to manage its credit risk. The use of these derivatives, in aggregate, detracted from performance.

Finally, we actively utilized leverage in the Fund. When the reporting period began, the Fund’s leverage as a percentage of total assets was roughly 45%. At the end of the period, approximately 48% of the Fund’s total assets were levered. Overall, leverage contributed to results given the positive total return of the assets of the Fund in 2025.

Performance review

For the twelve months ended December 31, 2025, Western Asset Mortgage Opportunity Fund Inc. returned 10.57% based on its net asset value (NAV)ii and 6.85% based on its New York Stock Exchange (NYSE) market price per share. The Fund’s unmanaged benchmark, the

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

ICE BofA U.S. Floating Rate Home Equity Loan Asset Backed Securities Indexiii, returned 5.58% for the same period.

The Fund has a practice of seeking to maintain a relatively stable level of distributions to shareholders. This practice has no impact on the Fund’s investment strategy and may reduce the Fund’s NAV. The Fund’s manager believes the practice helps maintain the Fund’s competitiveness and may benefit the Fund’s market price and premium/discount to the Fund’s NAV.

During the twelve-month period, the Fund made distributions to shareholders totaling $1.55 per share of which $0.38 will be treated as a return of capital for tax purposes.* The performance table shows the Fund’s twelve-month total return based on its NAV and market price as of December 31, 2025. Past performance is no guarantee of future results.

Performance Snapshot as of December 31, 2025
Price Per Share	12-Month Total Return**
$11.68 (NAV)	10.57 %†
$11.06 (Market Price)	6.85 %‡

All figures represent past performance and are not a guarantee of future results.

** Total returns are based on changes in NAV or market price, respectively. Returns reflect the deduction of all Fund expenses, including management fees, operating expenses, and other Fund expenses. Returns do not reflect the deduction of brokerage commissions or taxes that investors may pay on distributions or the sale of shares.

† Total return assumes the reinvestment of all distributions, including returns of capital, at NAV.

‡ Total return assumes the reinvestment of all distributions, including returns of capital, in additional shares in accordance with the Fund’s Dividend Reinvestment Plan.

Q. What were the leading contributors to performance?

A. NARMBS exposure was a contributor to performance, with legacy and new-issue RMBS positioning being the primary contributor. This was followed by an allocation to CRT securities. New issue CMBS and ABS exposure also contributed to performance.

Q. What were the leading detractors from performance?

A. Issue selection within high-yield REITs detracted from performance.

Looking for additional information?

The Fund is traded under the symbol “DMO” and its closing market price is available in most newspapers under the NYSE listings. The daily NAV is available online under the symbol “XDMOX” on most financial websites. Barron’s and The Wall Street Journal’s Monday edition both carry closed-end fund tables that provide additional information. In

For the tax character of distributions paid during the fiscal year ended December 31, 2025, please refer to page 49 of this report.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Fund overview (cont’d)

addition, the Fund issues a quarterly press release that can be found on most major financial websites as well as www.franklintempleton.com.

In a continuing effort to provide information concerning the Fund, shareholders may call 1-888-777-0102 (toll free), Monday through Friday from 8:00 a.m. to 5:30 p.m. Eastern Time, for the Fund’s current NAV, market price and other information.

Thank you for your investment in the Western Asset Mortgage Opportunity Fund Inc. As always, we appreciate that you have chosen us to manage your assets and we remain focused on achieving the Fund’s investment goals.

Sincerely,

Western Asset Management Company, LLC

January 16, 2026

RISKS: The Fund is a diversified, closed-end management investment company designed primarily as a long-term investment and not as a trading vehicle. The Fund is not intended to be a complete investment program and, due to the uncertainty inherent in all investments, there can be no assurance that the Fund will achieve its investment objective. The Fund’s common stock is traded on the New York Stock Exchange. Similar to stocks, the Fund’s share price will fluctuate with market conditions and, at the time of sale, may be worth more or less than the original investment. Shares of closed-end funds often trade at a discount to their net asset value. Diversification does not assure against market loss. The Fund’s investments are subject to a number of risks, including credit risk, inflation risk and interest rate risk. As interest rates rise, bond prices fall, reducing the value of the Fund’s fixed income holdings. The Fund may invest in lower-rated high-yield bonds (commonly known as “junk bonds”), which are subject to greater liquidity risk and credit risk (risk of default) than higher-rated obligations. Mortgage-backed securities (MBS) are subject to additional risks, including: (1) credit risk associated with the performance of the underlying mortgage properties and of the borrowers owning these properties; (2) adverse changes in economic conditions and circumstances, which are more likely to have an adverse impact on MBS secured by loans on certain types of commercial properties than on those secured by loans on residential properties;(3) prepayment risk, which can lead to significant fluctuations in value of the MBS and can limit the potential gains in a declining interest rate environment; (4) loss of all or part of the premium, if any, paid; and (5) decline in the market value of the security, whether resulting from changes in interest rates, prepayments on the underlying mortgage collateral or perceptions of the credit risk associated with the underlying mortgage collateral. To the extent the Fund invests in mortgage whole loans, certain of these risks may be magnified. In addition, risks associated with investments in whole loans include geographic concentration risk and risks relating to the reliance on third-party servicers to service and manage the mortgage whole loan. The Fund may invest in securities backed by subprime or distressed mortgages which involve a higher degree of risk and chance of loss. Leverage may result in greater volatility of NAV and the market price of common shares and increases a shareholder’s risk of loss. The Fund may make significant investments in derivative instruments. Derivative instruments can be illiquid, may disproportionately increase losses, and

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

have a potentially large impact on Fund performance. The Fund is not guaranteed by the U.S. government, the U.S. Treasury or any government agency. The market values of securities or other assets will fluctuate, sometimes sharply and unpredictably, due to changes in general market conditions, overall economic trends or events, governmental actions or intervention, actions taken by the U.S. Federal Reserve or foreign central banks, market disruptions caused by trade disputes or other factors, political developments, armed conflicts, economic sanctions and countermeasures in response to sanctions, major cybersecurity events, investor sentiment, the global and domestic effects of a pandemic, and other factors that may or may not be related to the issuer of the security or other asset. The Fund may also invest in money market funds, including funds affiliated with the Fund’s manager and subadvisers. For more information on Fund risks, see Summary of information regarding the Fund - Principal Risk Factors in this report.

All investments are subject to risk including the possible loss of principal. Past performance is no guarantee of future results. All index performance reflects no deduction for fees, expenses or taxes. Please note that an investor cannot invest directly in an index.

The information provided is not intended to be a forecast of future events, a guarantee of future results or investment advice. Views expressed may differ from those of the firm as a whole.

The Bloomberg U.S. Mortgage-Backed Securities Index covers agency mortgage-backed pass-through securities (both fixed-rate and hybrid ARM) issued by Government National Mortgage Association, Federal National Mortgage Association and Federal Home Loan Mortgage Corporation.

ii{

Net asset value (NAV) is calculated by subtracting total liabilities, including liabilities associated with financial leverage (if any) from the closing value of all securities held by the Fund (plus all other assets) and dividing the result (total net assets) by the total number of the common shares outstanding. The NAV fluctuates with changes in the market prices of securities in which the Fund has invested. However, the price at which an investor may buy or sell shares of the Fund is the Fund’s market price as determined by supply of and demand for the Fund’s shares.

iii

The ICE BofA U.S. Floating Rate Home Equity Loan Asset Backed Securities Index tracks the performance of U.S. dollar-denominated investment-grade floating-rate asset-backed securities collateralized by home equity loans publicly issued in the U.S. domestic market. Qualifying securities must have an investment-grade rating, at least one year remaining to final stated maturity, a floating-rate coupon, and an original deal size for the collateral group of at least $250 million.

Important data provider notices and terms available at www.franklintempletondatasources.com.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Fund at a glance† (unaudited)

Investment breakdown (%) as a percent of total investments

†

The bar graph above represents the composition of the Fund’s investments as of December 31, 2025, and December 31, 2024, and does not include derivatives, such as futures contracts. The Fund is actively managed. As a result, the composition of the Fund’s investments is subject to change at any time.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Fund performance (unaudited)

Net Asset Value
Average annual total returns1
Twelve Months Ended 12/31/25	10.57 %
Five Years Ended 12/31/25	6.05
Ten Years Ended 12/31/25	5.73
Cumulative total returns1
12/31/15 through 12/31/25	74.59 %

Market Price
Average annual total returns2
Twelve Months Ended 12/31/25	6.85 %
Five Years Ended 12/31/25	6.58
Ten Years Ended 12/31/25	4.80
Cumulative total returns2
12/31/15 through 12/31/25	59.79 %

All figures represent past performance and are not a guarantee of future results. Returns reflect the deduction of all Fund expenses, including management fees, operating expenses, and other Fund expenses. Returns do not reflect the deduction of brokerage commissions or taxes that investors may pay on distributions or the sale of shares. Performance figures may reflect compensating balance arrangements, fee waivers and/or expense reimbursements. In the absence of compensating balance arrangements, fee waivers and/or expense reimbursements, the total return would have been lower.

1	Assumes the reinvestment of all distributions, including returns of capital, if any, at net asset value.
2	Assumes the reinvestment of all distributions, including returns of capital, if any, in additional shares in accordance with the Fund’s Dividend Reinvestment Plan.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Fund performance (unaudited) (cont’d)

Historical performance

Value of $10,000 invested in

Western Asset Mortgage Opportunity Fund Inc. vs. ICE BofA U.S. Floating Rate Home Equity Loan Asset Backed Securities Index† — December 2015 - December 2025

†

Hypothetical illustration of $10,000 invested in Western Asset Mortgage Opportunity Fund Inc. on December 31, 2015, assuming the reinvestment of all distributions, including returns of capital, if any, at net asset value and also assuming the reinvestment of all distributions, including returns of capital, if any, in additional shares in accordance with the Fund’s Dividend Reinvestment Plan through December 31, 2025. The hypothetical illustration also assumes a $10,000 investment in the ICE BofA U.S. Floating Rate Home Equity Loan Asset Backed Securities Index. The ICE BofA U.S. Floating Rate Home Equity Loan Asset Backed Securities Index (the “Index”) is an unmanaged index composed of agency mortgage-backed pass-through securities, both fixed-rate and hybrid adjustable-rate mortgages, issued by the Government National Mortgage Association, Federal National Mortgage Association and Federal Home Loan Mortgage Corporation. The Index is unmanaged and is not subject to the same management and trading expenses as a mutual fund. Please note that an investor cannot invest directly in an index.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Schedule of investments

December 31, 2025

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Residential Mortgage-Backed Securities(a) — 112.7%
Adjustable Rate Mortgage Trust, 2005-5 1A1	3.727%	9/25/35	$70,331	$60,305 (b)
Adjustable Rate Mortgage Trust, 2005-7 2A21	4.611%	10/25/35	87,108	76,545 (b)
Adjustable Rate Mortgage Trust, 2005-12 5A1 (1 mo. Term SOFR + 0.614%)	4.346%	3/25/36	168,897	39,452 (b)
Aegis Asset-Backed Securities Trust, 2005-3 M3 (1 mo. Term SOFR + 0.849%)	4.581%	8/25/35	3,460,000	3,064,715 (b)(c)
Alternative Loan Trust, 2005-11CB 3A3, IO (-1.000 x 1 mo. Term SOFR + 4.886%)	1.154%	6/25/35	735,956	47,253 (b)
Alternative Loan Trust, 2005-14 3A1	3.477%	5/25/35	86,358	68,733 (b)
Alternative Loan Trust, 2005-36 4A1	4.242%	8/25/35	102,612	95,836 (b)
Alternative Loan Trust, 2005-J10 1A1 (1 mo. Term SOFR + 0.614%)	4.346%	10/25/35	358,801	202,206 (b)
Alternative Loan Trust, 2006-HY10 1A1	3.978%	5/25/36	104,667	94,965 (b)
Alternative Loan Trust, 2006-J8 A5	6.000%	2/25/37	70,645	26,296
Alternative Loan Trust, 2007-3T1 2A1	6.000%	3/25/27	13,037	13,049
Alternative Loan Trust, 2007-23CB A8 (-4.000 x 1 mo. Term SOFR + 27.942%)	13.015%	9/25/37	353,750	308,210 (b)(c)
Alternative Loan Trust, 2007-OA8 1A1 (1 mo. Term SOFR + 0.474%)	4.206%	6/25/47	530,157	483,654 (b)(c)
American Home Mortgage Assets Trust, 2005-2 2A1A	3.243%	1/25/36	516,036	321,862 (b)
American Home Mortgage Investment Trust, 2007-2 2A (1 mo. Term SOFR + 0.914%)	4.646%	3/25/47	12,735,445	81,015 (b)(c)
American Home Mortgage Investment Trust, 2007-A 4A (1 mo. Term SOFR + 1.014%)	4.746%	7/25/46	1,692,098	349,027 (b)(c)(d)
Anchor Mortgage Trust, 2025-RTL1 A2	6.358%	5/25/40	1,930,000	1,947,167 (c)(d)
Banc of America Funding Corp., 2015-R3 2A2	5.520%	2/27/37	2,120,593	1,946,857 (b)(c)(d)
Banc of America Funding Trust, 2004-C 3A1	4.717%	12/20/34	113,301	102,080 (b)
Banc of America Funding Trust, 2006-D 2A1	3.499%	5/20/36	25,483	23,818 (b)
Banc of America Funding Trust, 2006-F 1A1	6.045%	7/20/36	23,535	23,707 (b)
Banc of America Funding Trust, 2014-R5 1A2 (6 mo. Term SOFR + 1.928%)	3.848%	9/26/45	2,753,493	1,963,277 (b)(c)(d)
Bayview Financial Asset Trust, 2007-SR1A M2 (1 mo. Term SOFR + 1.014%)	4.746%	3/25/37	1,291,221	1,293,932 (b)(c)(d)
Bayview Financial Asset Trust, 2007-SR1A M3 (1 mo. Term SOFR + 1.264%)	4.996%	3/25/37	585,006	590,533 (b)(d)
Bear Stearns ALT-A Trust, 2005-9 25A1	4.368%	11/25/35	112,851	70,119 (b)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Schedule of investments (cont’d)

December 31, 2025

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Residential Mortgage-Backed Securities(a) — continued
Bear Stearns Asset-Backed Securities Trust, 2005-CL1 A1 (1 mo. Term SOFR + 0.614%)	2.461%	9/25/34	$7,585	$7,642 (b)
CAFL Issuer LLC, 2023-RTL1 A2	9.300%	12/28/30	1,770,000	1,770,000 (c)(d)
CAFL Issuer LLC, 2024-RTL1 A2	8.680%	11/28/31	1,460,000	1,495,392 (c)(d)
Chase Mortgage Finance Trust, 2006-S3 2A1	5.500%	11/1/36	122,368	10,067
ChaseFlex Trust, 2005-2 3A3, IO (-1.000 x 1 mo. Term SOFR + 5.386%)	1.654%	6/25/35	5,371,071	536,178 (b)(c)
Chevy Chase Funding LLC Mortgage-Backed Certificates, 2006-2A A1 (1 mo. Term SOFR + 0.244%)	4.199%	4/25/47	38,586	38,822 (b)(d)
CHL Mortgage Pass-Through Trust, 2005-18 A7 (-2.750 x 1 mo. Term SOFR + 19.210%)	8.948%	10/25/35	8,020	5,255 (b)
CHL Mortgage Pass-Through Trust, 2005- HY10 1A1	4.985%	2/20/36	2,664	2,445 (b)
CHL Mortgage Pass-Through Trust, 2005- HYB9 1A1 (12 mo. Term SOFR + 2.465%)	6.449%	2/20/36	59,192	55,920 (b)
CIM Trust, 2021-INV1 AXS, IO	0.190%	7/1/51	43,038,395	376,947 (b)(d)
Citicorp Mortgage Securities Trust, 2007-8 B1	5.899%	9/25/37	2,427,190	1,718,280 (b)(c)
Citigroup Mortgage Loan Trust, 2004-UST1 A2	5.592%	8/25/34	4,706	4,505 (b)
Citigroup Mortgage Loan Trust, 2006-AR5 2A1A	2.925%	7/25/36	131,796	74,864 (b)
Citigroup Mortgage Loan Trust, 2008-3 A3	6.100%	4/25/37	5,257,265	2,395,453 (c)(d)
Citigroup Mortgage Loan Trust, 2021-J2 A4I2, IO	0.180%	7/25/51	30,586,286	303,110 (b)(d)
Citigroup Mortgage Loan Trust, 2021-J2 AIOS, IO	0.080%	7/25/51	62,743,280	288,619 (b)(c)(d)
Countrywide Asset-Backed Certificates Trust, 2007-SEA1 1A1 (1 mo. Term SOFR + 1.214%)	4.946%	5/25/47	213,479	196,603 (b)(d)
Credit-Based Asset Servicing & Securitization LLC, 2006-SL1 A3 (1 mo. Term SOFR + 0.554%)	4.286%	9/25/36	3,367,724	111,673 (b)(d)
CSFB Mortgage-Backed Pass-Through Certificates, 2005-10 3A3	5.500%	11/25/35	178,102	90,399
CSMC Resecuritization Trust, 2006-1R 1A2 (-2.750 x 1 mo. Term SOFR + 19.210%)	8.960%	7/27/36	130,518	115,369 (b)(d)
CSMC Trust, 2014-11R 9A2 (1 mo. Term SOFR + 0.254%)	4.349%	10/27/36	2,320,889	1,840,752 (b)(c)(d)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Residential Mortgage-Backed Securities(a) — continued
CSMC Trust, 2015-2R 7A2	3.917%	8/27/36	$2,846,970	$2,419,549 (b)(c)(d)
CSMC Trust, 2017-RPL1 B4	2.974%	7/25/57	2,890,337	1,077,715 (b)(c)(d)
CSMC Trust, 2021-INV2 A3X, IO	0.500%	11/25/56	24,959,275	739,793 (b)(d)
CWABS Revolving Home Equity Loan Trust, 2004-L 2A (1 mo. Term SOFR + 0.394%)	4.145%	2/15/34	6,636	6,461 (b)
Deutsche Mortgage Securities Inc. Mortgage Loan Trust, 2006-PR1 2PO, PO	0.000%	4/15/36	9,960	4,336 (d)
Deutsche Mortgage Securities Inc. Mortgage Loan Trust, 2006-PR1 4AS1, IO	4.801%	4/15/36	26,511	2,371 (b)(d)
Deutsche Mortgage Securities Inc. Mortgage Loan Trust, 2006-PR1 4AS2, IO	7.374%	4/15/36	25,343	3,604 (b)(d)
Deutsche Mortgage Securities Inc. Mortgage Loan Trust, 2006-PR1 5AS1, IO	4.016%	4/15/36	34,425	5,143 (b)(d)
Deutsche Mortgage Securities Inc. Mortgage Loan Trust, 2006-PR1 5AS3, IO	3.916%	4/15/36	122,330	16,284 (b)(d)
DK Note Backed Trust, 2024-SPT1 A	7.086%	4/28/66	836,754	856,361 (c)(d)
Eagle RE Ltd., 2023-1 M2 (30 Day Average SOFR + 5.200%)	9.065%	9/26/33	1,290,000	1,367,021 (b)(c)(d)
Easy Street Mortgage Loan Trust, 2025- RTL1 A2	8.299%	5/25/40	1,010,000	1,023,083 (c)(d)
Easy Street Mortgage Loan Trust, 2025- RTL2 A2, Step Bond	7.164%	10/25/40	2,250,000	2,259,052 (c)(d)
FARM Mortgage Trust, 2021-1 B	3.227%	7/25/51	1,429,438	1,123,174 (b)(d)
FARM Mortgage Trust, 2024-2 B	5.584%	8/1/54	964,034	875,704 (b)(d)
Federal Home Loan Mortgage Corp. (FHLMC) REMIC, 5408 PI, IO, PAC	6.500%	3/25/54	709,152	137,846
Federal Home Loan Mortgage Corp. (FHLMC) REMIC, 5523 IQ, IO, PAC	6.500%	4/25/55	3,648,752	652,675
Federal Home Loan Mortgage Corp. (FHLMC) REMIC, Structured Agency Credit Risk Trust, 2020-DNA2 B2 (30 Day Average SOFR + 4.914%)	8.789%	2/25/50	1,166,729	1,288,341 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) REMIC, Structured Agency Credit Risk Trust, 2021-DNA5 B2 (30 Day Average SOFR + 5.500%)	9.374%	1/25/34	1,200,000	1,438,895 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) REMIC, Structured Agency Credit Risk Trust, 2021-DNA6 B2 (30 Day Average SOFR + 7.500%)	11.374%	10/25/41	1,640,000	1,713,022 (b)(c)(d)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Schedule of investments (cont’d)

December 31, 2025

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Residential Mortgage-Backed Securities(a) — continued
Federal Home Loan Mortgage Corp. (FHLMC) REMIC, Structured Agency Credit Risk Trust, 2021-HQA4 B2 (30 Day Average SOFR + 7.000%)	10.874%	12/25/41	$1,650,000	$1,729,951 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Seasoned Credit Risk Transfer Trust, 2016-1 B, PO	0.000%	9/25/55	11,958,075	1,812,813 (c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Seasoned Credit Risk Transfer Trust, 2016-1 BIO, IO	1.495%	9/25/55	19,126,454	2,243,692 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Seasoned Credit Risk Transfer Trust, 2016-1 XSIO, IO	0.075%	9/25/55	120,653,209	488,645 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Seasoned Credit Risk Transfer Trust, 2018-2 BX	1.638%	11/25/57	3,366,448	1,263,918 (b)(c)
Federal Home Loan Mortgage Corp. (FHLMC) Seasoned Credit Risk Transfer Trust, 2018-3 BX	2.186%	8/25/57	3,266,274	943,740 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Seasoned Credit Risk Transfer Trust, 2019-2 M	4.750%	8/25/58	644,342	629,643 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Seasoned Credit Risk Transfer Trust, 2020-1 BXS	4.470%	8/25/59	3,991,046	2,100,607 (b)(c)
Federal Home Loan Mortgage Corp. (FHLMC) Seasoned Credit Risk Transfer Trust, 2021-1 M	4.250%	9/25/60	1,222,525	1,184,791 (c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Seasoned Credit Risk Transfer Trust, 2021-3 BXS	7.763%	3/25/61	1,637,464	979,337 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Seasoned Credit Risk Transfer Trust, 2022-2 M	5.000%	4/25/62	1,337,000	1,235,292 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Seasoned Credit Risk Transfer Trust, 2024-1 M	5.000%	11/25/63	1,540,000	1,361,596 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Structured Agency Credit Risk Securitized Participation Interests Trust, 2017-SPI1 B	4.106%	9/25/47	736,970	539,150 (b)(c)(d)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Residential Mortgage-Backed Securities(a) — continued
Federal Home Loan Mortgage Corp. (FHLMC) Structured Agency Credit Risk Securitized Participation Interests Trust, 2018-SPI4 B	4.511%	11/25/48	$3,661,152	$2,777,059 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Structured Agency Credit Risk Trust, 2018-DNA3 B2 (30 Day Average SOFR + 7.864%)	11.739%	9/25/48	2,000,000	2,291,975 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Structured Agency Credit Risk Trust, 2018-HQA2 B2 (30 Day Average SOFR + 11.114%)	14.989%	10/25/48	1,870,000	2,322,953 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Structured Agency Credit Risk Trust, 2018-HRP1 B2 (30 Day Average SOFR + 11.864%)	15.739%	5/25/43	5,357,402	6,359,392 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Structured Agency Credit Risk Trust, 2018-HRP2 B2 (30 Day Average SOFR + 10.614%)	14.489%	2/25/47	3,530,000	4,321,909 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Structured Agency Credit Risk Trust, 2019-FTR1 B2 (30 Day Average SOFR + 8.464%)	12.339%	1/25/48	1,855,000	2,202,001 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Structured Agency Credit Risk Trust, 2019-FTR2 B2 (30 Day Average SOFR + 7.514%)	11.389%	11/25/48	1,270,000	1,493,031 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Structured Agency Credit Risk Trust, 2019-FTR3 B2 (30 Day Average SOFR + 4.914%)	8.986%	9/25/47	1,200,000	1,308,779 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Structured Agency Credit Risk Trust, 2019-FTR4 B2 (30 Day Average SOFR + 5.114%)	8.989%	11/25/47	1,250,000	1,376,170 (b)(c)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Structured Agency Credit Risk Trust, 2019-HQA3 B2 (30 Day Average SOFR + 7.614%)	11.489%	9/25/49	1,680,000	1,881,830 (b)(c)(d)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Schedule of investments (cont’d)

December 31, 2025

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Residential Mortgage-Backed Securities(a) — continued
Federal Home Loan Mortgage Corp. (FHLMC) Whole Loan Securities Trust, 2015- SC01 B	3.861%	5/25/45	$2,169,099	$1,457,071 (b)(d)
Federal National Mortgage Association (FNMA) — CAS, 2016-C01 1B (30 Day Average SOFR + 11.864%)	15.739%	8/25/28	1,841,065	1,868,585 (b)(c)
Federal National Mortgage Association (FNMA) — CAS, 2016-C03 1B (30 Day Average SOFR + 11.864%)	15.739%	10/25/28	1,916,575	1,975,793 (b)(c)
Federal National Mortgage Association (FNMA) — CAS, 2016-C06 1B (30 Day Average SOFR + 9.364%)	13.239%	4/25/29	3,484,915	3,685,927 (b)(c)
Federal National Mortgage Association (FNMA) — CAS, 2020-R01 1B1 (30 Day Average SOFR + 3.364%)	7.239%	1/25/40	1,500,000	1,528,450 (b)(c)(d)
Federal National Mortgage Association (FNMA) — CAS, 2021-R01 1B2 (30 Day Average SOFR + 6.000%)	9.874%	10/25/41	1,320,000	1,363,567 (b)(c)(d)
Federal National Mortgage Association (FNMA) — CAS, 2021-R02 2B2 (30 Day Average SOFR + 6.200%)	10.074%	11/25/41	1,500,000	1,555,985 (b)(c)(d)
Federal National Mortgage Association (FNMA) REMIC, 2012-134 LS, IO (-1.000 x 30 Day Average SOFR + 6.036%)	2.161%	12/25/42	829,921	88,263 (b)
First Horizon Alternative Mortgage Securities Trust, 2005-AA6 3A1	4.572%	8/25/35	173,989	143,320 (b)
First Horizon Alternative Mortgage Securities Trust, 2006-FA6 2A1, PAC	6.250%	11/25/36	64,242	16,133
Government National Mortgage Association (GNMA), 2023-184 HI, IO	7.000%	12/20/53	1,311,929	276,635
Government National Mortgage Association (GNMA), 2024-151 KS, IO (-1.000 x 30 Day Average SOFR + 6.050%)	2.132%	9/20/54	2,874,692	262,000 (b)
Government National Mortgage Association (GNMA), 2025-108 SC, IO (-1.000 x 30 Day Average SOFR + 5.880%)	1.962%	6/20/55	2,881,480	247,419 (b)
Government National Mortgage Association (GNMA), 2025-114 WS, IO (-1.000 x 30 Day Average SOFR + 5.150%)	1.232%	7/20/55	5,727,351	265,911 (b)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Residential Mortgage-Backed Securities(a) — continued
Government National Mortgage Association (GNMA), 2025-141 SE, IO (-1.000 x 30 Day Average SOFR + 5.850%)	1.932%	8/20/55	$3,177,352	$283,081 (b)
GS Mortgage Securities Corp. Trust, 2000-1A A (1 mo. Term SOFR + 0.464%)	4.789%	3/20/26	7,068	718 (b)(d)
GS Mortgage-Backed Securities Trust, 2021-GR2 AIOS, IO	0.190%	2/25/52	62,875,735	692,834 (b)(c)(d)
GS Mortgage-Backed Securities Trust, 2021-PJ2 AIOS, IO	0.220%	7/25/51	58,140,710	770,353 (b)(c)(d)
GS Mortgage-Backed Securities Trust, 2022-NQM1 B4	4.079%	5/25/62	1,506,765	1,315,465 (b)(c)(d)
GSMPS Mortgage Loan Trust, 2006-RP1 1A2	7.500%	1/25/36	201,704	180,444 (d)
Home RE Ltd., 2023-1 M2 (30 Day Average SOFR + 6.000%)	9.865%	10/25/33	1,000,000	1,073,429 (b)(c)(d)
HSI Asset Loan Obligation Trust, 2007-AR1 4A1	4.984%	1/25/37	52,334	39,674 (b)
Impac CMB Trust, 2004-8 1A (1 mo. Term SOFR + 0.834%)	4.566%	10/25/34	17,061	16,956 (b)
IndyMac INDA Mortgage Loan Trust, 2005- AR2 1A1	3.665%	1/25/36	56,280	43,891 (b)
IndyMac INDX Mortgage Loan Trust, 2004- AR13 1A1	3.412%	1/25/35	20,802	19,137 (b)
IndyMac INDX Mortgage Loan Trust, 2005- AR15 A2	3.983%	9/25/35	29,460	23,912 (b)(c)
IndyMac INDX Mortgage Loan Trust, 2005- AR18 1A1 (1 mo. Term SOFR + 0.734%)	4.466%	10/25/36	1,492,763	605,522 (b)(c)
IndyMac INDX Mortgage Loan Trust, 2006- AR7 5A1	3.926%	5/25/36	91,849	85,783 (b)
IndyMac INDX Mortgage Loan Trust, 2006- AR9 3A3	3.396%	6/25/36	185,137	160,105 (b)
IndyMac INDX Mortgage Loan Trust, 2006- AR11 1A1	4.398%	6/25/36	192,731	148,089 (b)
JPMorgan Alternative Loan Trust, 2007-A1 3A1	4.154%	3/25/37	163,489	142,667 (b)
JPMorgan Mortgage Trust, 2007-S2 3A2	6.000%	6/25/37	17,019	16,738
JPMorgan Mortgage Trust, 2007-S2 3A3	6.500%	6/25/37	4,096	4,088
JPMorgan Mortgage Trust, 2024-3 AX1, IO	0.334%	5/25/54	19,608,381	395,378 (b)(d)
Legacy Mortgage Asset Trust, 2021-GS3 A2	7.250%	7/25/61	1,819,979	1,820,700 (c)(d)
Lehman Mortgage Trust, 2006-3 1A7, IO (-1.000 x 1 mo. Term SOFR + 5.286%)	1.554%	7/25/36	3,963,600	429,230 (b)(c)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Schedule of investments (cont’d)

December 31, 2025

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Residential Mortgage-Backed Securities(a) — continued
Lehman Mortgage Trust, 2007-5 2A3 (1 mo. Term SOFR + 0.444%)	4.176%	6/25/37	$2,577,502	$397,430 (b)
Lehman XS Trust, 2006-19 A4 (1 mo. Term SOFR + 0.454%)	4.186%	12/25/36	255,913	253,271 (b)(c)
LHOME Mortgage Trust, 2024-RTL1 A2	9.165%	1/25/29	1,100,000	1,114,031 (c)(d)
LHOME Mortgage Trust, 2024-RTL2 A2	8.897%	3/25/29	760,000	767,567 (c)(d)
LHOME Mortgage Trust, 2024-RTL5 M2	8.180%	9/25/39	1,500,000	1,519,099 (b)(c)(d)
MASTR Adjustable Rate Mortgages Trust, 2004-12 5A1	6.170%	10/25/34	2,377	2,333 (b)
MASTR Adjustable Rate Mortgages Trust, 2006-OA1 1A1 (1 mo. Term SOFR + 0.324%)	4.056%	4/25/46	82,127	77,326 (b)
MASTR Reperforming Loan Trust, 2005-1 1A4	7.500%	8/25/34	34,980	25,253 (d)
Merrill Lynch Mortgage Investors Trust, 2006-A1 2A1	4.312%	3/25/36	287,595	134,118 (b)
Morgan Stanley Mortgage Loan Trust, 2006- 8AR 1A2 (1 mo. Term SOFR + 0.254%)	3.986%	6/25/36	181,165	32,609 (b)
Morgan Stanley Mortgage Loan Trust, 2007- 5AX 2A3 (1 mo. Term SOFR + 0.574%)	4.306%	2/25/37	1,279,095	247,734 (b)
Morgan Stanley Mortgage Loan Trust, 2007- 15AR 4A1	3.551%	11/25/37	425,947	368,424 (b)
Morgan Stanley Re-REMIC Trust, 2015-R2 1B (12 mo. Moving Treasury Average + 0.710%)	4.020%	12/27/46	630,500	572,684 (b)(c)(d)
New Residential Mortgage Loan Trust, 2017-1A B6	5.311%	2/25/57	2,028,080	1,910,945 (b)(c)(d)
New Residential Mortgage Loan Trust, 2019-4A B6	4.493%	12/25/58	2,099,322	1,395,097 (b)(c)(d)
New Residential Mortgage Loan Trust, 2019-6A A1IB, IO	0.500%	9/25/59	14,034,162	195,092 (b)(c)(d)
New Residential Mortgage Loan Trust, 2019-NQM4 B2	5.107%	9/25/59	1,608,000	1,523,602 (b)(c)(d)
New Residential Mortgage Loan Trust, 2024-RTL1 M1	9.298%	3/25/39	380,000	382,160 (b)(c)(d)
New Residential Mortgage Loan Trust, 2024-RTL1 M2	9.298%	3/25/39	870,000	870,947 (b)(c)(d)
NYMT Loan Trust, 2024-BPL1 A2	8.617%	2/25/29	1,620,000	1,624,688 (c)(d)
PRKCM Trust, 2023-AFC1 M1	7.399%	2/25/58	1,480,000	1,479,999 (b)(c)(d)
PRKCM Trust, 2023-AFC3 B1	7.769%	9/25/58	1,220,000	1,233,042 (b)(c)(d)
PRKCM Trust, 2024-AFC1 B2	8.399%	3/25/59	1,450,000	1,465,347 (b)(c)(d)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Residential Mortgage-Backed Securities(a) — continued
Provident Home Equity Loan Trust, 2000-2 A1 (1 mo. Term SOFR + 0.654%)	4.386%	8/25/31	$406,196	$390,205 (b)
PRPM LLC, 2025-RCF3 M1B	5.250%	7/25/55	1,000,000	984,877 (b)(c)(d)
RAAC Trust, 2007-SP1 M3 (1 mo. Term SOFR + 1.614%)	5.346%	3/25/37	1,429,840	1,201,957 (b)(c)
RALI Trust, 2005-QA3 CB4	4.074%	3/25/35	686,075	317,435 (b)
RALI Trust, 2006-QA1 A11	5.071%	1/25/36	185,504	133,628 (b)
RALI Trust, 2006-QA4 A (1 mo. Term SOFR + 0.474%)	4.206%	5/25/36	102,969	95,243 (b)(c)
RALI Trust, 2006-QO2 A1 (1 mo. Term SOFR + 0.554%)	4.286%	2/25/46	165,246	27,446 (b)(c)
RAMP Trust, 2004-RS4 MII2 (1 mo. Term SOFR + 1.464%)	4.921%	4/25/34	757,981	694,469 (b)(c)
Redwood Funding Trust, 2025-2 A	7.112%	10/25/55	1,065,494	1,074,374 (d)
Redwood Funding Trust, 2025-3 A	6.231%	12/27/56	839,532	847,726 (d)
Redwood Funding Trust, 2025-3 B	7.749%	12/27/56	1,100,000	1,110,314 (d)
Renaissance Home Equity Loan Trust, 2006-1 AF5	6.166%	5/25/36	516,941	241,020 (c)
Renaissance Home Equity Loan Trust, 2007-3 AF3	7.238%	9/25/37	1,431,967	554,083 (c)
Residential Asset Securitization Trust, 2007-A2 1A1	6.000%	4/25/37	175,426	87,279 (c)
RFMSI Trust, 2006-S8 A12, IO (-1.000 x 1 mo. Term SOFR + 5.286%)	1.554%	9/25/36	1,563,716	114,005 (b)
Saluda Grade Alternative Mortgage Trust, 2024-RTL4 A2	7.500%	2/25/30	1,770,000	1,769,639 (c)(d)
Starwood Mortgage Residential Trust, 2020-3 B2	4.750%	4/25/65	1,490,000	1,313,848 (b)(c)(d)
Starwood Mortgage Residential Trust, 2021-4 B31	4.678%	8/25/56	2,700,000	1,932,090 (b)(c)(d)
Structured Adjustable Rate Mortgage Loan Trust, 2004-18 1A2	4.664%	12/25/34	113,492	102,514 (b)
Structured Adjustable Rate Mortgage Loan Trust, 2005-4 1A1	4.230%	3/25/35	81,101	68,225 (b)
Structured Adjustable Rate Mortgage Loan Trust, 2005-7 1A3	4.543%	4/25/35	25,082	22,581 (b)
Structured Asset Investment Loan Trust, 2004-8 M9 (1 mo. Term SOFR + 3.864%)	7.596%	9/25/34	297,405	234,179 (b)(c)
Toorak Mortgage Trust, 2024-RRTL1 B1	10.335%	2/25/39	800,000	807,130 (b)(c)(d)
Toorak Mortgage Trust, 2024-RRTL1 B2	10.335%	2/25/39	640,000	644,682 (b)(c)(d)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Schedule of investments (cont’d)

December 31, 2025

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Residential Mortgage-Backed Securities(a) — continued
UWM Mortgage Trust, 2021-1 AX4, IO	0.250%	6/25/51	$22,116,413	$257,021 (b)(d)
Verus Securitization Trust, 2023-3 B1	7.713%	3/25/68	1,200,000	1,203,896 (b)(c)(d)
Verus Securitization Trust, 2023-4 B1	8.017%	5/25/68	1,170,000	1,177,376 (b)(c)(d)
Verus Securitization Trust, 2023-5 B1	7.971%	6/25/68	1,200,000	1,210,386 (b)(c)(d)
Verus Securitization Trust, 2023-7 B1	7.899%	10/25/68	1,960,000	1,989,067 (b)(c)(d)
Verus Securitization Trust, 2024-8 B1	7.032%	10/25/69	1,750,000	1,770,854 (b)(c)(d)
Verus Securitization Trust, 2025-R1 B1	6.400%	5/25/65	1,450,000	1,447,995 (b)(c)(d)
Wachovia Mortgage Loan Trust LLC, 2005-B 2A2	6.710%	10/20/35	3,586	3,513 (b)
WaMu Mortgage Pass-Through Certificates Trust, 2005-8 1A6 (-3.667 x 1 mo. Term SOFR + 22.864%)	9.181%	10/25/35	84,334	86,772 (b)
WaMu Mortgage Pass-Through Certificates Trust, 2005-9 5A4 (-7.333 x 1 mo. Term SOFR + 35.094%)	7.728%	11/25/35	33,136	32,661 (b)(c)
WaMu Mortgage Pass-Through Certificates Trust, 2005-10 2A3 (1 mo. Term SOFR + 1.014%)	4.746%	11/25/35	57,244	52,127 (b)(c)
WaMu Mortgage Pass-Through Certificates Trust, 2005-AR2 B1 (1 mo. Term SOFR + 0.909%)	4.641%	1/25/45	1,188,001	1,085,708 (b)(c)
WaMu Mortgage Pass-Through Certificates Trust, 2005-AR13 A1C3 (1 mo. Term SOFR + 1.094%)	4.826%	10/25/45	52,707	51,070 (b)(c)
WaMu Mortgage Pass-Through Certificates Trust, 2006-AR10 A1 (1 mo. Term SOFR + 0.314%)	4.046%	12/25/36	219,382	110,789 (b)(c)

Total Residential Mortgage-Backed Securities (Cost — $143,499,317)				150,435,847
Commercial Mortgage-Backed Securities(a) — 49.3%
280 Park Avenue Mortgage Trust, 2017- 280P E (1 mo. Term SOFR + 2.419%)	6.197%	9/15/34	3,430,000	3,391,387 (b)(d)
280 Park Avenue Mortgage Trust, 2017- 280P F (1 mo. Term SOFR + 3.127%)	6.905%	9/15/34	320,000	312,570 (b)(d)
Atrium Hotel Portfolio Trust, 2017-ATRM E (1 mo. Term SOFR + 3.347%)	7.098%	12/15/36	1,388,311	1,283,494 (b)(d)
BANK, 2021-BN35 H	1.662%	6/15/64	1,860,000	739,803 (b)(d)
BANK, 2021-BN35 K	1.662%	6/15/64	4,703,147	1,750,021 (b)(d)
BANK, 2022-BNK43 E	3.000%	8/15/55	1,500,000	1,035,126 (d)
BANK, 2022-BNK44 D	4.000%	11/15/32	948,000	749,063 (b)(d)
Benchmark Mortgage Trust, 2023-V3 D	4.000%	7/15/56	1,100,000	988,200 (d)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Commercial Mortgage-Backed Securities(a) — continued
BF Mortgage Trust, 2019-NYT E (1 mo. Term SOFR + 2.797%)	6.548%	12/15/35	$1,440,000	$1,314,152 (b)(d)
BFLD Commercial Mortgage Trust, 2024- UNIV E (1 mo. Term SOFR + 3.640%)	7.390%	11/15/41	1,170,000	1,175,280 (b)(d)
BPR Trust, 2021-TY F (1 mo. Term SOFR + 4.314%)	8.065%	9/15/38	1,000,000	991,762 (b)(d)
BRES Commercial Mortgage Trust, 2025- ATCAP F (1 mo. Term SOFR + 5.189%)	8.939%	11/15/42	2,000,000	2,015,162 (b)(d)
BSREP Commercial Mortgage Trust, 2021-DC HRR (1 mo. Term SOFR + 5.614%)	9.365%	8/15/38	3,013,097	590,302 (b)(d)
BWAY Mortgage Trust, 2013-1515 F	3.927%	3/10/33	1,500,000	1,278,464 (b)(d)
BX Commercial Mortgage Trust, 2019-IMC F (1 mo. Term SOFR + 2.946%)	6.696%	4/15/34	2,000,000	1,957,544 (b)(d)
BX Commercial Mortgage Trust, 2021-XL2 J (1 mo. Term SOFR + 4.004%)	7.754%	10/15/38	1,750,000	1,757,998 (b)(d)
BX Commercial Mortgage Trust, 2022-LP2 G (1 mo. Term SOFR + 4.106%)	7.856%	2/15/39	805,000	806,005 (b)(d)
BX Commercial Mortgage Trust, 2024-KING E (1 mo. Term SOFR + 3.688%)	7.438%	5/15/34	1,174,537	1,181,955 (b)(d)
BX Commercial Mortgage Trust, 2025-SPOT E (1 mo. Term SOFR + 3.690%)	7.440%	4/15/40	1,133,303	1,142,523 (b)(d)
CSMC Trust, 2017-CHOP F (PRIME + 1.294%)	8.044%	7/15/32	1,620,000	1,612,513 (b)(d)
CSMC Trust, 2017-CHOP H (PRIME + 4.294%)	11.044%	7/15/32	1,509,000	1,451,055 (b)(d)
CSMC Trust, 2021-ADV G (1 mo. Term SOFR + 6.364%)	10.115%	7/15/38	1,500,000	141 (b)(d)
Extended Stay America Trust, 2025-ESH D (1 mo. Term SOFR + 2.600%)	6.350%	10/15/42	330,000	332,891 (b)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Multifamily Structured Credit Risk Trust, 2023-MN7 B1 (30 Day Average SOFR + 8.850%)	12.724%	9/25/43	2,200,000	2,516,891 (b)(d)
Federal Home Loan Mortgage Corp. (FHLMC) Multifamily Structured Credit Risk Trust, 2021-MN1 B1 (30 Day Average SOFR + 7.750%)	11.624%	1/25/51	950,000	1,050,349 (b)(d)
FREMF Mortgage Trust, 2021-F117 CS (30 Day Average SOFR + 6.400%)	10.409%	7/25/31	539,301	497,323 (b)(d)
FRESB Mortgage Trust, 2018-SB48 B	4.354%	2/25/38	1,028,071	612,340 (b)(d)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Schedule of investments (cont’d)

December 31, 2025

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Commercial Mortgage-Backed Securities(a) — continued
Government National Mortgage Association (GNMA), 2020-89 IA, IO	1.169%	4/16/62	$5,725,883	$463,421 (b)
Greystone CRE Notes, 2024-HC3 D (1 mo. Term SOFR + 5.333%)	9.083%	3/15/41	610,000	614,419 (b)(d)
Greystone CRE Notes LLC, 2025-HC4 D (1 mo. Term SOFR + 3.940%)	7.690%	10/15/42	2,000,000	1,992,798 (b)(d)
GS Mortgage Securities Corp., 2024-70P HRR	10.000%	3/10/41	4,420,000	4,466,534 (b)(d)
GS Mortgage Securities Corp. Trust, 2018- LUAU G (1 mo. Term SOFR + 4.747%)	8.497%	11/15/32	2,500,000	2,475,455 (b)(d)
GS Mortgage Securities Trust, 2015-GC32 D	3.345%	7/10/48	13,134	12,879
HIH Trust, 2024-61P F (1 mo. Term SOFR + 5.437%)	9.187%	10/15/41	1,477,881	1,491,182 (b)(d)
HIT Trust, 2022-HI32 G (1 mo. Term SOFR + 7.228%)	10.978%	7/15/39	1,600,000	1,620,657 (b)(d)
KIND Trust, 2021-KIND F (1 mo. Term SOFR + 4.064%)	7.820%	8/15/38	1,299,330	1,288,945 (b)(d)
MF1 Ltd., 2021-FL7 E (1 mo. Term SOFR + 2.914%)	6.649%	10/16/36	2,000,000	1,969,967 (b)(d)
Multifamily CAS Trust, 2019-1 CE (30 Day Average SOFR + 8.864%)	12.739%	10/25/49	2,500,000	2,569,781 (b)(d)
Multifamily CAS Trust, 2020-1 CE (30 Day Average SOFR + 7.614%)	11.489%	3/25/50	1,500,000	1,558,577 (b)(d)
Natixis Commercial Mortgage Securities Trust, 2019-FAME D	4.398%	8/15/36	500,000	330,583 (b)(d)
Natixis Commercial Mortgage Securities Trust, 2019-FAME E	4.398%	8/15/36	950,000	366,478 (b)(d)
Natixis Commercial Mortgage Securities Trust, 2022-JERI G (1 mo. Term SOFR + 7.608%)	11.358%	1/15/39	3,500,000	2,307,077 (b)(d)
Natixis Commercial Mortgage Securities Trust, 2022-RRI E (1 mo. Term SOFR + 5.193%)	8.943%	3/15/35	1,272,750	1,266,739 (b)(d)
NYC Commercial Mortgage Trust, 2025-28L F	8.130%	11/5/38	600,000	606,346 (b)(d)
NYC Commercial Mortgage Trust, 2025-28L G	9.321%	11/5/38	1,400,000	1,397,827 (b)(d)
ROCK Trust, 2024-CNTR E	8.819%	11/13/41	1,600,000	1,706,950 (d)
SMR Mortgage Trust, 2022-IND G (1 mo. Term SOFR + 7.500%)	11.250%	2/15/39	1,831,354	1,682,859 (b)(d)
Soho Trust, 2021-SOHO D	2.697%	8/10/38	1,000,000	725,550 (b)(d)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value
Commercial Mortgage-Backed Securities(a) — continued
Wells Fargo Commercial Mortgage Trust, 2017-C42 D	2.800%	12/15/50	$1,000,000	$660,178 (b)(d)
Wells Fargo Commercial Mortgage Trust, 2022-JS2 G	3.454%	12/15/39	2,200,000	1,649,549 (b)(d)

Total Commercial Mortgage-Backed Securities (Cost — $71,610,405)				65,759,065
			Face Amount/ Units
Asset-Backed Securities — 19.6%
Apex Credit CLO Ltd., 2019-2A D1NR (3 mo. Term SOFR + 3.500%)	7.358%	1/25/38	$560,000	561,709 (b)(c)(d)
Avis Budget Rental Car Funding AESOP LLC, 2023-6A D	7.370%	12/20/29	670,000	689,162 (d)
Balboa Bay Loan Funding Ltd., 2023-1A ERR (3 mo. Term SOFR + 5.400%)	9.284%	4/20/36	640,000	635,684 (b)(c)(d)
Balboa Bay Loan Funding Ltd., 2024-2A E (3 mo. Term SOFR + 5.750%)	9.634%	1/20/38	290,000	292,855 (b)(c)(d)
Bayview Opportunity Master Fund LLC, 2024-CAR1 E (30 Day Average SOFR + 3.600%)	7.474%	12/26/31	590,190	596,967 (b)(d)
Bear Mountain Park CLO Ltd., 2022-1A ER (3 mo. Term SOFR + 5.950%)	9.855%	7/15/37	500,000	502,101 (b)(c)(d)
Black Diamond CLO Ltd., 2021-1A CR (3 mo. Term SOFR + 3.900%)	7.757%	11/22/34	510,000	512,506 (b)(c)(d)
Clover CLO LLC, 2021-3A ER (3 mo. Term SOFR + 4.900%)	8.758%	1/25/35	720,000	702,078 (b)(c)(d)
Columbia Cent CLO Ltd., 2025-35A D1A (3 mo. Term SOFR + 3.500%)	7.822%	7/25/36	500,000	502,763 (b)(c)(d)
Conseco Finance Corp., 1999-4 A8	7.700%	5/1/31	4,595,673	1,231,999 (b)
Conseco Finance Corp., 1999-4 A9	7.020%	5/1/31	10,216,241	2,534,550 (b)
DRB Prime Student Loan Trust, 2017-A R	30.679%	5/27/42	429	747,401 (d)(e)
Elevation CLO Ltd., 2016-5A ERR (3 mo. Term SOFR + 7.580%)	11.438%	1/25/38	500,000	504,329 (b)(c)(d)
Golub Capital Partners CLO Ltd., 2024-77A E (3 mo. Term SOFR + 4.850%)	8.708%	1/25/38	850,000	854,760 (b)(c)(d)
Hartwick Park CLO Ltd., 2023-1A ER (3 mo. Term SOFR + 4.850%)	8.734%	1/20/37	630,000	624,616 (b)(c)(d)
Home Partners of America Trust, 2021-2 F	3.799%	12/17/26	1,429,649	1,401,969 (c)(d)
Huntington Bank Auto Credit-Linked Notes, 2025-2 D (30 Day Average SOFR + 3.250%)	7.168%	9/20/33	591,589	594,396 (b)(d)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Schedule of investments (cont’d)

December 31, 2025

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount/ Units	Value
Asset-Backed Securities — continued
Jamestown CLO Ltd., 2021-17A DR (3 mo. Term SOFR + 3.500%)	7.358%	1/25/35	$280,000	$280,975 (b)(c)(d)
Loanpal Solar Loan Ltd., 2020-3GS C	3.500%	12/20/47	593,508	323,000 (d)
Loanpal Solar Loan Ltd., 2021-1GS C	3.500%	1/20/48	615,053	393,978 (d)
Lunar Structured Aircraft Portfolio Notes, 2021-1 C	5.682%	10/15/46	891,999	864,955 (d)
Magnetite Ltd., 2023-39A E1R (3 mo. Term SOFR + 4.900%)	8.758%	1/25/37	280,000	279,208 (b)(c)(d)
MetroNet Infrastructure Issuer LLC, 2025-2A C	7.830%	8/20/55	670,000	689,644 (d)
MidOcean Credit CLO LLC, 2025-18A E (3 mo. Term SOFR + 5.400%)	9.718%	10/18/35	600,000	598,358 (b)(c)(d)
National Collegiate Class A-3L Commutation Trust, 2007-4VI O (1 mo. USD LIBOR + 0.850%)	5.810%	3/29/38	5,942,187	466,973 (b)(d)
National Collegiate Student Loan Trust, 2006-3 B (1 mo. Term SOFR + 0.474%)	4.206%	1/26/32	1,547,064	1,457,299 (b)
Nelnet Student Loan Trust, 2021-DA D	4.380%	4/20/62	1,200,000	1,056,070 (d)
New Mountain CLO Ltd., 5A D1R (3 mo. Term SOFR + 3.150%)	7.034%	7/20/36	260,000	261,216 (b)(c)(d)
NRM Excess LLC, 2024-FNT1 A	7.398%	11/25/31	695,598	708,610 (d)
Ocean Trails CLO Ltd., 2023-14A ER (3 mo. Term SOFR + 6.340%)	10.224%	1/20/38	600,000	605,895 (b)(c)(d)
RBS Acceptance Inc., 1995-BA1 B2	9.000%	12/10/26	2,191,561	22
Renew Financial, 2024-2A B	8.223%	11/20/60	828,638	833,322 (d)
RR Ltd., 2021-18A DR (3 mo. Term SOFR + 4.900%)	8.805%	7/15/40	520,000	525,139 (b)(c)(d)
SEB Funding LLC, 2024-1A A2	7.386%	4/30/54	1,020,000	1,044,438 (d)
Sierra Timeshare Receivables Funding LLC, 2024-1A D	8.020%	1/20/43	296,920	303,974 (d)
Stonepeak, 2021-1A B	3.821%	2/28/33	534,738	524,149 (d)
Sunnova Hellios II Issuer LLC, 2018-1A B	7.710%	7/20/48	810,165	718,206 (d)
Whitebox CLO Ltd., 2025-5A E (3 mo. Term SOFR + 5.250%)	9.504%	7/20/38	690,000	696,727 (b)(c)(d)

Total Asset-Backed Securities (Cost — $27,705,335)				26,122,003

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate		Shares	Value
Preferred Stocks — 3.9%
Financials — 3.9%
Mortgage Real Estate Investment Trusts (REITs) — 3.9%
AGNC Investment Corp., Non Voting Shares (3 mo. Term SOFR + 4.959%)	8.863%		52,953	$1,299,467 (b)
Arbor Realty Trust Inc., Non Voting Shares (6.250% to 10/12/26 then 3 mo. Term SOFR + 5.440%)	6.250%		44,004	957,527 (b)
Chimera Investment Corp., Non Voting Shares	8.000%		31,752	693,464
Chimera Investment Corp., Non Voting Shares (3 mo. Term SOFR + 5.005%)	8.690%		31,276	667,117 (b)
MFA Financial Inc., Non Voting Shares (3 mo. Term SOFR + 5.607%)	9.258%		70,049	1,598,518 (b)

Total Preferred Stocks (Cost — $5,196,873)				5,216,093
		Maturity Date	Face Amount
Corporate Bonds & Notes — 3.1%
Consumer Discretionary — 0.7%
Hotels, Restaurants & Leisure — 0.7%
Full House Resorts Inc., Senior Secured Notes	8.250%	2/15/28	$1,050,000	916,125 (d)

Financials — 1.9%
Insurance — 0.6%
Allianz SE, Junior Subordinated Notes (3.200% to 4/30/28 then 5 year Treasury Constant Maturity Rate + 2.165%)	3.200%	10/30/27	800,000	757,207 (b)(d)(f)
Mortgage Real Estate Investment Trusts (REITs) — 1.3%
Arbor Realty SR Inc., Senior Notes	8.500%	12/15/28	400,000	398,531 (d)
Arbor Realty SR Inc., Senior Notes	7.875%	7/15/30	1,430,000	1,368,229 (d)
Total Mortgage Real Estate Investment Trusts (REITs)				1,766,760

Total Financials				2,523,967
Health Care — 0.4%
Health Care Providers & Services — 0.4%
CHS/Community Health Systems Inc., Secured Notes	6.875%	4/15/29	710,000	632,574 (d)

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Schedule of investments (cont’d)

December 31, 2025

Western Asset Mortgage Opportunity Fund Inc.

(Percentages shown based on Fund net assets)

Security	Rate	Maturity Date	Face Amount	Value

Real Estate — 0.1%
Real Estate Management & Development — 0.1%
Cushman & Wakefield US Borrower LLC, Senior Secured Notes	8.875%	9/1/31	$130,000	$139,186 (d)

Total Corporate Bonds & Notes (Cost — $4,149,557)				4,211,852
Senior Loans — 1.0%
Financials — 0.7%
Financial Services — 0.7%
Greystone Select Holdings LLC, Term Loan B (3 mo. Term SOFR + 5.262%)	9.119%	6/16/28	968,354	961,092 (b)(g)(h)(i)

Real Estate — 0.3%
Real Estate Management & Development — 0.3%
Cushman & Wakefield US Borrower LLC, 2025 Term Loan (1 mo. Term SOFR + 2.750%)	6.466%	1/31/30	423,750	426,811 (b)(g)(h)

Total Senior Loans (Cost — $1,379,329)				1,387,903
Total Investments before Short-Term Investments (Cost — $253,540,816)				253,132,763
			Shares
Short-Term Investments — 0.6%
Western Asset Premier Institutional Government Reserves, Premium Shares (Cost — $828,977)	3.739%		828,977	828,977 (j)(k)
Total Investments — 190.2% (Cost — $254,369,793)				253,961,740
Liabilities in Excess of Other Assets — (90.2)%				(120,468,582 )
Total Net Assets — 100.0%				$133,493,158

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Western Asset Mortgage Opportunity Fund Inc.

(a)	Collateralized mortgage obligations are secured by an underlying pool of mortgages or mortgage pass-through certificates that are structured to direct payments on underlying collateral to different series or classes of the obligations. The interest rate may change positively or inversely in relation to one or more interest rates, financial indices or other financial indicators and may be subject to an upper and/or lower limit.
(b)	Variable rate security. Interest rate disclosed is as of the most recent information available. Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions. These securities do not indicate a reference rate and spread in their description above.
(c)	All or a portion of this security is held by the counterparty as collateral for open reverse repurchase agreements.
(d)	Security is exempt from registration under Rule 144A of the Securities Act of 1933. This security may be resold in transactions that are exempt from registration, normally to qualified institutional buyers. This security has been deemed liquid pursuant to guidelines approved by the Board of Directors.
(e)	Rate shown is the current yield based on income received over the trailing twelve months.
(f)	Security has no maturity date. The date shown represents the next call date.
(g)	Interest rates disclosed represent the effective rates on senior loans. Ranges in interest rates are attributable to multiple contracts under the same loan.
(h)	Senior loans may be considered restricted in that the Fund ordinarily is contractually obligated to receive approval from the agent bank and/or borrower prior to the disposition of a senior loan.
(i)	Security is valued using significant unobservable inputs (Note 1).
(j)	Rate shown is one-day yield as of the end of the reporting period.
(k)	In this instance, as defined in the Investment Company Act of 1940, an “Affiliated Company” represents Fund ownership of at least 5% of the outstanding voting securities of an issuer, or a company which is under common ownership or control with the Fund. At December 31, 2025, the total market value of investments in Affiliated Companies was $828,977 and the cost was $828,977 (Note 8).

Abbreviation(s) used in this schedule:
CAS	—	Connecticut Avenue Securities
CLO	—	Collateralized Loan Obligation
IO	—	Interest Only
LIBOR	—	London Interbank Offered Rate
PAC	—	Planned Amortization Class
PO	—	Principal Only
REMIC	—	Real Estate Mortgage Investment Conduit
Re-REMIC	—	Resecuritization of Real Estate Mortgage Investment Conduit
SOFR	—	Secured Overnight Financing Rate
USD	—	United States Dollar

At December 31, 2025, the Fund had the following open reverse repurchase agreements:

Counterparty	Rate	Effective Date	Maturity Date	Face Amount of Reverse Repurchase Agreements	Asset Class of Collateral*	Collateral Value**
Nomura Securities Inc.	5.749%	12/8/2025	2/20/2026	$1,198,000	Asset-Backed Securities	$1,399,202

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Schedule of investments (cont’d)

December 31, 2025

Western Asset Mortgage Opportunity Fund Inc.

Counterparty	Rate	Effective Date	Maturity Date	Face Amount of Reverse Repurchase Agreements	Asset Class of Collateral*	Collateral Value**
Nomura Securities Inc.	5.901%	11/4/2025	2/20/2026	$2,000,000	Residential Mortgage- Backed Securities Asset-Backed Securities	$195,872 2,184,978
Nomura Securities Inc.	5.912%	11/5/2025	2/20/2026	1,969,000	Residential Mortgage- Backed Securities	2,261,738
Nomura Securities Inc.	5.916%	10/15/2025	2/20/2026	118,029,000	Residential Mortgage- Backed Securities Asset-Backed Securities	131,558,712 6,959,794
				$123,196,000		$144,560,296

*	Refer to the Schedule of Investments for positions held at the counterparty as collateral for reverse repurchase agreements.
**	Including accrued interest.

At December 31, 2025, the Fund had the following open futures contracts:

	Number of Contracts	Expiration Date	Notional Amount	Market Value	Unrealized Appreciation
Contracts to Sell:
U.S. Treasury Long-Term Bonds	44	3/26	$5,140,705	$5,086,125	$54,580
U.S. Treasury Ultra 10-Year Notes	79	3/26	9,113,058	9,086,235	26,823
U.S. Treasury Ultra Long-Term Bonds	20	3/26	2,390,591	2,360,000	30,591
Net unrealized appreciation on open futures contracts					$111,994

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Statement of assets and liabilities

December 31, 2025

Assets:
Investments in unaffiliated securities, at value (Cost — $253,540,816)	$253,132,763
Investments in affiliated securities, at value (Cost — $828,977)	828,977
Cash	2,546,901
Interest receivable	1,496,446
Deposits with brokers for open futures contracts	505,669
Receivable from brokers — net variation margin on open futures contracts	31,938
Dividends receivable from affiliated investments	1,158
Prepaid expenses	129,496
Total Assets	258,673,348
Liabilities:
Payable for open reverse repurchase agreements (Note 3)	123,196,000
Interest and commitment fees payable	1,559,186
Investment management fee payable	218,451
Directors’ fees payable	294
Accrued expenses	206,259
Total Liabilities	125,180,190
Total Net Assets	$133,493,158
Net Assets:
Par value ($0.001 par value; 11,427,128 shares issued and outstanding; 100,000,000 shares authorized)	$11,427
Paid-in capital in excess of par value	192,028,245
Total distributable earnings (loss)	(58,546,514 )
Total Net Assets	$133,493,158
Shares Outstanding	11,427,128
Net Asset Value	$11.68

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Statement of operations

For the Year Ended December 31, 2025

Investment Income:
Interest	$22,280,758
Dividends from unaffiliated investments	430,447
Dividends from affiliated investments	120,151
Total Investment Income	22,831,356
Expenses:
Interest expense (Note 3)	7,530,514
Investment management fee (Note 2)	2,556,837
Legal fees	254,283
Audit and tax fees	98,871
Transfer agent fees	70,974
Shareholder reports	62,494
Commitment fees	55,013
Directors’ fees	44,411
Fund accounting fees	22,181
Stock exchange listing fees	12,500
Insurance	1,672
Custody fees	842
Miscellaneous expenses	45,867
Total Expenses	10,756,459
Less: Fee waivers and/or expense reimbursements (Note 2)	(55,928 )
Net Expenses	10,700,531
Net Investment Income	12,130,825
Realized and Unrealized Gain (Loss) on Investments, Futures Contracts, Written Options and Swap Contracts (Notes 1, 3 and 4):
Net Realized Gain (Loss) From:
Investment transactions in unaffiliated securities	(6,195,773 )
Futures contracts	(270,244 )
Written options	24,120
Swap contracts	(328,430 )
Net Realized Loss	(6,770,327 )
Change in Net Unrealized Appreciation (Depreciation) From:
Investments in unaffiliated securities	8,532,465
Futures contracts	(195,570 )
Change in Net Unrealized Appreciation (Depreciation)	8,336,895
Net Gain on Investments, Futures Contracts, Written Options and Swap Contracts	1,566,568
Increase in Net Assets From Operations	$13,697,393

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Statements of changes in net assets

For the Years Ended December 31,	2025	2024
Operations:
Net investment income	$12,130,825	$13,168,718
Net realized loss	(6,770,327 )	(11,368,993 )
Change in net unrealized appreciation (depreciation)	8,336,895	15,337,161
Increase in Net Assets From Operations	13,697,393	17,136,886
Distributions to Shareholders From (Note 1):
Total distributable earnings	(13,360,788 )	(15,517,236 )
Return of capital	(4,303,244 )	(1,843,358 )
Decrease in Net Assets From Distributions to Shareholders	(17,664,032 )	(17,360,594 )
Fund Share Transactions:
Net proceeds from sale of shares (31,986 and 0 shares issued, respectively) (Note 7)	379,235 †	—
Reinvestment of distributions (8,931 and 2,670 shares issued, respectively)	106,079	32,441
Increase in Net Assets From Fund Share Transactions	485,314	32,441
Decrease in Net Assets	(3,481,325 )	(191,267 )
Net Assets:
Beginning of year	136,974,483	137,165,750
End of year	$133,493,158	$136,974,483

†	Net of sales charges of $3,837 and shelf registration offering costs of $644 (Note 7).

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Statement of cash flows

For the Year Ended December 31, 2025

Increase (Decrease) in Cash:
Cash Flows from Operating Activities:
Net increase in net assets resulting from operations	$13,697,393
Adjustments to reconcile net increase in net assets resulting from operations to net cash provided (used) by operating activities:
Purchases of portfolio securities	(51,252,500 )
Sales of portfolio securities	53,828,509
Net purchases, sales and maturities of short-term investments	(283,146 )
Net amortization of premium (accretion of discount)	455,982
Increase in interest receivable	(113,287 )
Increase in prepaid expenses	(55,260 )
Decrease in dividends receivable from affiliated investments	5,428
Decrease in principal paydown receivable	97,317
Decrease in receivable from brokers — net variation margin on open futures contracts	7,562
Decrease in payable for securities purchased	(2,164,000 )
Increase in investment management fee payable	14,332
Decrease in Directors’ fees payable	(4,695 )
Decrease in interest expense payable	(125,257 )
Increase in accrued expenses	92,500
Net realized loss on investments	6,195,773
Change in net unrealized appreciation (depreciation) of investments	(8,532,465 )
Net Cash Provided in Operating Activities*	11,864,186
Cash Flows from Financing Activities:
Distributions paid on common stock (net of distributions payable)	(17,557,953 )
Increase in payable for open reverse repurchase agreements	7,842,000
Net proceeds from sale of shares	379,235
Net Cash Used by Financing Activities	(9,336,718 )
Net Increase in Cash and Restricted Cash	2,527,468
Cash and restricted cash at beginning of year	525,102
Cash and restricted cash at end of year	$3,052,570

*	Included in operating expenses is $7,710,775 paid for interest on borrowings.

The following table provides a reconciliation of cash and restricted cash reported within the Statement of Assets

and Liabilities that sums to the total of such amounts shown on the Statement of Cash Flows.

	December 31, 2025
Cash	$2,546,901
Restricted cash	505,669
Total cash and restricted cash shown in the Statement of Cash Flows	$3,052,570

Restricted cash consists of cash that has been segregated to cover the Fund’s collateral or margin obligations under derivative contracts. It is separately reported on the Statement of Assets and Liabilities as Deposits with

brokers.

Non-Cash Financing Activities:
Proceeds from reinvestment of distributions	$106,079

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Financial highlights

For a share of capital stock outstanding throughout each year ended December 31:
	20251	20241	20231	20221	20211	20201,2
Net asset value, beginning of year	$12.03	$12.05	$12.12	$15.40	$14.96	$19.48
Income (loss) from operations:
Net investment income	1.06	1.16	1.07	0.95	0.89	1.23
Net realized and unrealized gain (loss)	0.14	0.35	0.14	(3.00 )	0.90	(4.20 )
Total income (loss) from operations	1.20	1.51	1.21	(2.05)	1.79	(2.97)
Less distributions from:
Net investment income	(1.17 )	(1.37 )	(1.28 )	(1.23 )	(1.16 )	(1.13 )
Net realized gains	—	—	—	—	—	—
Return of capital	(0.38 )	(0.16 )	—	(0.01 )	(0.19 )	(0.42 )
Total distributions	(1.55 )	(1.53 )	(1.28 )	(1.24 )	(1.35 )	(1.55 )
Anti-dilutive impact of repurchase plan	—	—	0.00 3,4	0.01 4	—	—
Net asset value, end of year	$11.68	$12.03	$12.05	$12.12	$15.40	$14.96
Market price, end of year	$11.06	$11.80	$11.17	$10.77	$15.21	$14.18
Total return, based on NAV5,6	10.57 %	13.16 %	10.51 %	(13.69 )%	12.38 %	(14.67 )%
Total return, based on Market Price7	6.85 %	20.06 %	16.68 %	(21.64 )%	17.24 %	(22.13 )%
Net assets, end of year (millions)	$133	$137	$137	$138	$177	$165
Ratios to average net assets:
Gross expenses	7.91 %	8.07 %	7.28 %	3.80 %	2.38 %	2.82 %
Net expenses8	7.87 9	7.95 9	7.14 9	3.72 9	2.10 9	2.53 9
Net investment income	8.92	9.49	8.87	6.96	5.82	8.18
Portfolio turnover rate	20 %	28 %	24 %	24 %10	14 %	11 %
Loan Outstanding, End of Year (000s)	—	—	—	—	—	$45,000
Asset Coverage Ratio for Loan Outstanding11	—	—	—	—	—	467 %
Asset Coverage, per $1,000 Principal Amount of Loan Outstanding11	—	—	—	—	—	$4,667
Weighted Average Loan (000s)	—	—	—	—	$45,000	$62,369
Weighted Average Interest Rate on Loan	—	—	—	—	1.84 %	2.14 %

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Financial highlights (cont’d)

For a share of capital stock outstanding throughout each year ended December 31:
	20191,2	20181,2	20171,2	20161,2
Net asset value, beginning of year	$19.28	$21.27	$20.70	$22.76
Income (loss) from operations:
Net investment income	1.51	1.65	1.57	1.47
Net realized and unrealized gain (loss)	0.65	0.22	2.28	(0.53 )
Total income (loss) from operations	2.16	1.87	3.85	0.94
Less distributions from:
Net investment income	(1.45 )	(3.03 )	(2.69 )	(2.95 )
Net realized gains	—	(0.83 )	(0.59 )	(0.05 )
Return of capital	(0.51 )	—	—	—
Total distributions	(1.96 )	(3.86 )	(3.28 )	(3.00 )
Anti-dilutive impact of repurchase plan	—	—	—	—
Net asset value, end of year	$19.48	$19.28	$21.27	$20.70
Market price, end of year	$20.30	$20.39	$24.67	$22.79
Total return, based on NAV5,6	11.65 %	9.26 %	19.70 %	4.47 %
Total return, based on Market Price7	9.71 %	(1.16 )%	24.20 %	10.80 %
Net assets, end of year (millions)	$205	$202	$222	$216
Ratios to average net assets:
Gross expenses	3.56 %	3.15 %	2.68 %	2.97 %
Net expenses8	3.56	3.15	2.68	2.97
Net investment income	7.73	7.78	7.29	6.78
Portfolio turnover rate	17 %	33 %	35 %	24 %10
Loan Outstanding, End of Year (000s)	$98,000	$99,250	$101,750	$101,750
Asset Coverage Ratio for Loan Outstanding11	309 %	303 %	319 %	312 %
Asset Coverage, per $1,000 Principal Amount of Loan Outstanding11	$3,089	$3,035	$3,185	$3,124
Weighted Average Loan (000s)	$98,072	$101,743	$101,750	$90,984
Weighted Average Interest Rate on Loan	3.46 %	3.06 %	2.06 %	1.50 %

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

1	Per share amounts have been calculated using the average shares method.
2	Not covered by the current report of the independent registered public accounting firm.
3	Amount represents less than $0.005 or greater than $(0.005) per share.
4	The repurchase plan was completed at an average repurchase price of $10.21 for 13,982 shares and $142,726 for the year ended December 31, 2023, and $11.16 for 67,728 shares and $755,559 for the year ended December 31, 2022.
5	Performance figures may reflect compensating balance arrangements, fee waivers and/or expense reimbursements. In the absence of compensating balance arrangements, fee waivers and/or expense reimbursements, the total return would have been lower. Past performance is no guarantee of future results.
6	The total return calculation assumes that distributions are reinvested at NAV. Past performance is no guarantee of future results.
7	The total return calculation assumes that distributions are reinvested in accordance with the Fund’s dividend reinvestment plan. Past performance is no guarantee of future results.
8	The manager has agreed to waive the Fund’s management fee to an extent sufficient to offset the net management fee payable in connection with any investment in an affiliated money market fund.
9	Reflects fee waivers and/or expense reimbursements.
10	Including mortgage dollar roll transactions. If mortgage dollar roll transactions had been excluded, the portfolio turnover rates for the respective year/period presented would have been 22% and 23%.
11	Represents value of net assets plus the loan outstanding at the end of the period divided by the loan outstanding at the end of the period.

See Notes to Financial Statements.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Notes to financial statements

1. Organization and significant accounting policies

Western Asset Mortgage Opportunity Fund Inc. (the “Fund”) was incorporated in Maryland on December 11, 2009, and is registered as a diversified, closed-end management investment company under the Investment Company Act of 1940, as amended (the “1940 Act”). The Fund’s primary investment objective is to provide current income. As a secondary investment objective, the Fund will seek capital appreciation. The Fund seeks to achieve its investment objectives by investing primarily in a diverse portfolio of mortgage-backed securities (“MBS”) and mortgage whole loans. Investments in MBS consist primarily of non-agency residential mortgage-backed securities (“RMBS”) and commercial mortgage-backed securities (“CMBS”).

The Fund follows the accounting and reporting guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification Topic 946, Financial Services – Investment Companies (“ASC 946”). The following are significant accounting policies consistently followed by the Fund and are in conformity with U.S. generally accepted accounting principles (“GAAP”), including, but not limited to, ASC 946. Estimates and assumptions are required to be made regarding assets, liabilities and changes in net assets resulting from operations when financial statements are prepared. Changes in the economic environment, financial markets and any other parameters used in determining these estimates could cause actual results to differ. Subsequent events have been evaluated through the date the financial statements were issued.

(a) Investment valuation. The valuations for fixed income securities (which may include, but are not limited to, corporate, government, municipal, mortgage-backed, collateralized mortgage obligations and asset-backed securities) and certain derivative instruments are typically the prices supplied by independent third party pricing services, which may use market prices or broker/dealer quotations or a variety of valuation techniques and methodologies. The independent third party pricing services typically use inputs that are observable such as issuer details, interest rates, yield curves, prepayment speeds, credit risks/spreads, default rates and quoted prices for similar securities. Investments in open-end funds are valued at the closing net asset value per share of each fund on the day of valuation. Futures contracts are valued daily at the settlement price established by the board of trade or exchange on which they are traded. Equity securities for which market quotations are available are valued at the last reported sales price or official closing price on the primary market or exchange on which they trade. When the Fund holds securities or other assets that are denominated in a foreign currency, the Fund will normally use the currency exchange rates as of 4:00 p.m. (Eastern Time). If independent third party pricing services are unable to supply prices for a portfolio investment, or if the prices supplied are deemed by the manager to be unreliable, the market price may be determined by the manager using quotations from one or more broker/dealers or at the transaction price if the security has recently been purchased and no value has yet been obtained from a pricing service or pricing broker. When reliable prices are not readily available, such as when the value of a security has been significantly affected by events after the close of the exchange or market on which the security is principally traded, but before the Fund calculates its net

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

asset value, the Fund values these securities as determined in accordance with procedures approved by the Fund’s Board of Directors (the “Board”).

Pursuant to policies adopted by the Board, the Fund’s manager has been designated as the valuation designee and is responsible for the oversight of the daily valuation process. The Fund’s manager is assisted by the Global Fund Valuation Committee (the “Valuation Committee”). The Valuation Committee is responsible for making fair value determinations, evaluating the effectiveness of the Fund’s pricing policies, and reporting to the Fund’s manager and the Board. When determining the reliability of third party pricing information for investments owned by the Fund, the Valuation Committee, among other things, conducts due diligence reviews of pricing vendors, monitors the daily change in prices and reviews transactions among market participants.

The Valuation Committee will consider pricing methodologies it deems relevant and appropriate when making fair value determinations. Examples of possible methodologies include, but are not limited to, multiple of earnings; discount from market of a similar freely traded security; discounted cash-flow analysis; book value or a multiple thereof; risk premium/yield analysis; yield to maturity; and/or fundamental investment analysis. The Valuation Committee will also consider factors it deems relevant and appropriate in light of the facts and circumstances. Examples of possible factors include, but are not limited to, the type of security; the issuer’s financial statements; the purchase price of the security; the discount from market value of unrestricted securities of the same class at the time of purchase; analysts’ research and observations from financial institutions; information regarding any transactions or offers with respect to the security; the existence of merger proposals or tender offers affecting the security; the price and extent of public trading in similar securities of the issuer or comparable companies; and the existence of a shelf registration for restricted securities.

For each portfolio security that has been fair valued pursuant to the policies adopted by the Board, the fair value price is compared against the last available and next available market quotations. The Valuation Committee reviews the results of such back testing monthly and fair valuation occurrences are reported to the Board quarterly.

The Fund uses valuation techniques to measure fair value that are consistent with the market approach and/or income approach, depending on the type of security and the particular circumstance. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable securities. The income approach uses valuation techniques to discount estimated future cash flows to present value.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Notes to financial statements (cont’d)

GAAP establishes a disclosure hierarchy that categorizes the inputs to valuation techniques used to value assets and liabilities at measurement date. These inputs are summarized in the three broad levels listed below:

•

Level 1 — unadjusted quoted prices in active markets for identical investments

•

Level 2 — other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.)

•

Level 3 — significant unobservable inputs (including the Fund’s own assumptions in determining the fair value of investments)

The inputs or methodologies used to value securities are not necessarily an indication of the risk associated with investing in those securities.

The following is a summary of the inputs used in valuing the Fund’s assets carried at fair value:

ASSETS
Description	Quoted Prices (Level 1)	Other Significant Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)	Total
Long-Term Investments†:
Residential Mortgage-Backed Securities	—	$150,435,847	—	$150,435,847
Commercial Mortgage-Backed Securities	—	65,759,065	—	65,759,065
Asset-Backed Securities	—	26,122,003	—	26,122,003
Preferred Stocks	$5,216,093	—	—	5,216,093
Corporate Bonds & Notes	—	4,211,852	—	4,211,852
Senior Loans:
Financials	—	—	$961,092	961,092
Real Estate	—	426,811	—	426,811
Total Long-Term Investments	5,216,093	246,955,578	961,092	253,132,763
Short-Term Investments†	828,977	—	—	828,977
Total Investments	$6,045,070	$246,955,578	$961,092	$253,961,740
Other Financial Instruments:
Futures Contracts††	$111,994	—	—	$111,994
Total	$6,157,064	$246,955,578	$961,092	$254,073,734

†	See Schedule of Investments for additional detailed categorizations.
††	Reflects the unrealized appreciation (depreciation) of the instruments.

(b) Written options. The Fund may write option contracts generally to gain or reduce exposure to certain types of investments or market factors or as a means of attempting to enhance returns. When the Fund writes an option, an amount equal to the premium received by the Fund is recorded as a liability, the value of which is marked-to-market daily to reflect the current market value of the option written. If the option expires, the premium received is recorded as a realized gain. When a written call option is exercised, the

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

difference between the premium received plus the option exercise price and the Fund’s basis in the underlying security (in the case of a covered written call option), or the cost to purchase the underlying security (in the case of an uncovered written call option), including brokerage commission, is recognized as a realized gain or loss. When a written put option is exercised, the amount of the premium received is subtracted from the cost of the security purchased by the Fund from the exercise of the written put option to form the Fund’s basis in the underlying security purchased. The writer or buyer of an option traded on an exchange can liquidate the position before the exercise of the option by entering into a closing transaction. The cost of a closing transaction is deducted from the original premium received resulting in a realized gain or loss to the Fund.

The risk in writing a covered call option is that the Fund may forego the opportunity of profit if the market price of the underlying security increases and the option is exercised. The risk in writing a put option is that the Fund may incur a loss if the market price of the underlying security decreases and the option is exercised. The risk in writing an uncovered call option is that the Fund is exposed to the risk of loss if the market price of the underlying security increases. In addition, there is the risk that the Fund may not be able to enter into a closing transaction because of an illiquid secondary market.

(c) Futures contracts. The Fund uses futures contracts generally to gain exposure to, or hedge against, changes in interest rates or gain exposure to, or hedge against, changes in certain asset classes. A futures contract represents a commitment for the future purchase or sale of an asset at a specified price on a specified date.

Upon entering into a futures contract, the Fund is required to deposit cash or securities with a broker in an amount equal to a certain percentage of the contract amount. This is known as the ‘‘initial margin’’ and subsequent payments (‘‘variation margin’’) are made or received by the Fund each day, depending on the daily fluctuation in the value of the contract. For certain futures, including foreign denominated futures, variation margin is not settled daily, but is recorded as a net variation margin payable or receivable. The daily changes in contract value are recorded as unrealized appreciation or depreciation in the Statement of Operations and the Fund recognizes a realized gain or loss when the contract is closed.

Futures contracts involve, to varying degrees, risk of loss in excess of the amounts reflected in the financial statements. In addition, there is the risk that the Fund may not be able to enter into a closing transaction because of an illiquid secondary market.

(d) Swap agreements. The Fund invests in swaps for the purpose of managing its exposure to interest rate, credit or market risk, or for other purposes. The use of swaps involves risks that are different from those associated with other portfolio transactions. Swap agreements are privately negotiated in the over-the-counter market and may be entered into as a bilateral contract (“OTC Swaps”) or centrally cleared (“Centrally Cleared Swaps”). Unlike Centrally Cleared Swaps, the Fund has credit exposure to the counterparties of OTC Swaps.

In a Centrally Cleared Swap, immediately following execution of the swap, the swap agreement is submitted to a clearinghouse or central counterparty (the “CCP”) and the CCP

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Notes to financial statements (cont’d)

becomes the ultimate counterparty of the swap agreement. The Fund is required to interface with the CCP through a broker, acting in an agency capacity. All payments are settled with the CCP through the broker. Upon entering into a Centrally Cleared Swap, the Fund is required to deposit initial margin with the broker in the form of cash or securities.

Swap contracts are marked-to-market daily and changes in value are recorded as unrealized appreciation (depreciation). The daily change in valuation of Centrally Cleared Swaps, if any, is recorded as a net receivable or payable for variation margin on the Statement of Assets and Liabilities. Gains or losses are realized upon termination of the swap agreement. Collateral, in the form of restricted cash or securities, may be required to be held in segregated accounts with the Fund’s custodian in compliance with the terms of the swap contracts. Securities posted as collateral for swap contracts are identified in the Schedule of Investments and restricted cash, if any, is identified on the Statement of Assets and Liabilities. Risks may exceed amounts recorded in the Statement of Assets and Liabilities. These risks include changes in the returns of the underlying instruments, failure of the counterparties to perform under the contracts’ terms, and the possible lack of liquidity with respect to the swap agreements.

OTC Swap payments received or made at the beginning of the measurement period are reflected as a premium or deposit, respectively, on the Statement of Assets and Liabilities. These upfront payments are amortized over the life of the swap and are recognized as realized gain or loss in the Statement of Operations. Net periodic payments received or paid by the Fund are recognized as a realized gain or loss in the Statement of Operations.

The Fund’s maximum exposure in the event of a defined credit event on a credit default swap to sell protection is the notional amount. As of December 31, 2025, the Fund did not hold any credit default swaps to sell protection.

For average notional amounts of swaps held during the year ended December 31, 2025, see Note 4.

Credit default swaps

The Fund enters into credit default swap (“CDS”) contracts for investment purposes, to manage its credit risk or to add leverage. CDS agreements involve one party making a stream of payments to another party in exchange for the right to receive a specified return in the event of a default by a third party, typically corporate or sovereign issuers, on a specified obligation, or in the event of a write-down, principal shortfall, interest shortfall or default of all or part of the referenced entities comprising a credit index. The Fund may use a CDS to provide protection against defaults of the issuers (i.e., to reduce risk where the Fund has exposure to an issuer) or to take an active long or short position with respect to the likelihood of a particular issuer’s default. As a seller of protection, the Fund generally receives an upfront payment or a stream of payments throughout the term of the swap, provided that there is no credit event. If the Fund is a seller of protection and a credit event occurs, as defined under the terms of that particular swap agreement, the maximum potential amount of future payments (undiscounted) that the Fund could be required to make under a CDS agreement would be an amount equal to the notional amount of the

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

agreement. These amounts of potential payments will be partially offset by any recovery of values from the respective referenced obligations. As a seller of protection, the Fund effectively adds leverage to its portfolio because, in addition to its total net assets, the Fund is subject to investment exposure on the notional amount of the swap. As a buyer of protection, the Fund generally receives an amount up to the notional value of the swap if a credit event occurs.

Implied spreads are the theoretical prices a lender receives for credit default protection. When spreads rise, market perceived credit risk rises and when spreads fall, market perceived credit risk falls. The implied credit spread of a particular referenced entity reflects the cost of buying/selling protection and may include upfront payments required to enter into the agreement. Wider credit spreads and decreasing market values, when compared to the notional amount of the swap, represent a deterioration of the referenced entity’s credit soundness and a greater likelihood or risk of default or other credit event occurring as defined under the terms of the agreement. Credit spreads utilized in determining the period end market value of CDS agreements on corporate or sovereign issues are disclosed in the Schedule of Investments and serve as an indicator of the current status of the payment/performance risk and represent the likelihood or risk of default for credit derivatives. For CDS agreements on asset-backed securities and credit indices, the quoted market prices and resulting values, particularly in relation to the notional amount of the contract as well as the annual payment rate, serve as an indication of the current status of the payment/performance risk.

The Fund’s maximum risk of loss from counterparty risk, as the protection buyer, is the fair value of the contract (this risk is mitigated by the posting of collateral by the counterparty to the Fund to cover the Fund’s exposure to the counterparty). As the protection seller, the Fund’s maximum risk is the notional amount of the contract. CDS are considered to have credit risk-related contingent features since they require payment by the protection seller to the protection buyer upon the occurrence of a defined credit event.

Entering into a CDS agreement involves, to varying degrees, elements of credit, market and documentation risk in excess of the related amounts recognized on the Statement of Assets and Liabilities. Such risks involve the possibility that there will be no liquid market for these agreements, that the counterparty to the agreement may default on its obligation to perform or disagree as to the meaning of the contractual terms in the agreement, and that there will be unfavorable changes in net interest rates.

(e) Loan participations. The Fund may invest in loans arranged through private negotiation between one or more financial institutions. The Fund’s investment in any such loan may be in the form of a participation in or an assignment of the loan. In connection with purchasing participations, the Fund generally will have no right to enforce compliance by the borrower with the terms of the loan agreement related to the loan, or any rights of offset against the borrower and the Fund may not benefit directly from any collateral supporting the loan in which it has purchased the participation.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Notes to financial statements (cont’d)

The Fund assumes the credit risk of the borrower, the lender that is selling the participation and any other persons interpositioned between the Fund and the borrower. In the event of the insolvency of the lender selling the participation, the Fund may be treated as a general creditor of the lender and may not benefit from any offset between the lender and the borrower.

(f) Stripped securities. The Fund may invest in ‘‘Stripped Securities,’’ a term used collectively for components, or strips, of fixed income securities. Stripped Securities can be principal only securities (“PO”), which are debt obligations that have been stripped of unmatured interest coupons, or interest only securities (“IO”), which are unmatured interest coupons that have been stripped from debt obligations. The market value of Stripped Securities will fluctuate in response to changes in economic conditions, rates of pre-payment, interest rates and the market’s perception of the securities. However, fluctuations in response to interest rates may be greater in Stripped Securities than for debt obligations of comparable maturities that pay interest currently. The amount of fluctuation may increase with a longer period of maturity.

The yield to maturity on IO’s is sensitive to the rate of principal repayments (including prepayments) on the related underlying debt obligation and principal payments may have a material effect on yield to maturity. If the underlying debt obligation experiences greater than anticipated prepayments of principal, the Fund may not fully recoup its initial investment in IO’s.

(g) Reverse repurchase agreements. The Fund may enter into reverse repurchase agreements. Under the terms of a typical reverse repurchase agreement, a fund sells a security subject to an obligation to repurchase the security from the buyer at an agreed upon time and price. In the event the buyer of securities under a reverse repurchase agreement files for bankruptcy or becomes insolvent, the Fund’s use of the proceeds of the agreement may be restricted pending a determination by the counterparty, or its trustee or receiver, whether to enforce the Fund’s obligation to repurchase the securities. In entering into reverse repurchase agreements, the Fund will pledge cash, U.S. government securities or other liquid debt obligations at least equal in value to its obligations with respect to reverse repurchase agreements or will take other actions permitted by law to cover its obligations. If the market value of the collateral declines during the period, the Fund may be required to post additional collateral to cover its obligation. Cash collateral that has been pledged to cover obligations of the Fund under reverse repurchase agreements, if any, will be reported separately in the Statement of Assets and Liabilities. Securities pledged as collateral are noted in the Schedule of Investments. Interest payments made on reverse repurchase agreements are recognized as a component of “Interest expense” on the Statement of Operations. In periods of increased demand for the security, the Fund may receive a fee for use of the security by the counterparty, which may result in interest income to the Fund.

(h) Mortgage-backed securities. Mortgage-Backed Securities (“MBS”) include CMBS and RMBS. These securities depend on payments (except for rights or other assets designed to assure the servicing or timely distribution of proceeds to holders of such

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

securities) primarily from the cash flow from secured commercial or residential mortgage loans made to borrowers. Such loans are secured (on a first priority basis or second priority basis, subject to permitted liens, easements and other encumbrances) by commercial or residential real estate, the proceeds of which are used to purchase and or to construct commercial or residential real estate. The value of some mortgage-backed securities may be particularly sensitive to changes in prevailing interest rates. The value of these securities may fluctuate in response to the market’s perception of the creditworthiness of the issuers. Additionally, although certain mortgage-related securities are supported by some form of government or private guarantee and/or insurance, there is no assurance that private guarantors or insurers will meet their obligations.

(i) Leverage. The Fund may seek to enhance the level of its current distributions to holders of common stock through the use of leverage. The Fund may use leverage directly at the Fund level through borrowings, including loans from certain financial institutions or through a qualified government sponsored program, the use of reverse repurchase agreements and/or the issuance of debt securities (collectively, “Borrowings”), and through the issuance of preferred stock (“Preferred Stock”), in an aggregate amount of up to approximately 33 1/3% of the Fund’s Total Assets immediately after such Borrowings and/or issuances of Preferred Stock. “Total Assets” for this purpose means the Fund’s total assets less all liabilities and indebtedness not represented by senior securities. In addition, the Fund may enter into additional reverse repurchase agreements and/or use similar investment management techniques that may provide leverage, but which are not subject to the foregoing 33 1/3% limitation to the extent that the Fund elects to treat such repurchase agreements and similar financing transactions as “derivative transactions” under Rule 18f-4 of the 1940 Act.

(j) Cash flow information. The Fund invests in securities and distributes dividends from net investment income and net realized gains, which are paid in cash and may be reinvested at the discretion of shareholders. These activities are reported in the Statements of Changes in Net Assets and additional information on cash receipts and cash payments is presented in the Statement of Cash Flows.

(k) Credit and market risk. Investments in securities that are collateralized by real estate mortgages are subject to certain credit and liquidity risks. When market conditions result in an increase in default rates of the underlying mortgages and the foreclosure values of underlying real estate properties are materially below the outstanding amount of these underlying mortgages, collection of the full amount of accrued interest and principal on these investments may be doubtful. Such market conditions may significantly impair the value and liquidity of these investments and may result in a lack of correlation between their credit ratings and values.

(l) Foreign investment risks. The Fund’s investments in foreign securities may involve risks not present in domestic investments. Since securities may be denominated in foreign currencies, may require settlement in foreign currencies or may pay interest or dividends in foreign currencies, changes in the relationship of these foreign currencies to the U.S. dollar can significantly affect the value of the investments and earnings of the Fund. Foreign

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Notes to financial statements (cont’d)

investments may also subject the Fund to foreign government exchange restrictions, expropriation, taxation or other political, social or economic developments, all of which affect the market and/or credit risk of the investments.

(m) Counterparty risk and credit-risk-related contingent features of derivative instruments. The Fund may invest in certain securities or engage in other transactions where the Fund is exposed to counterparty credit risk in addition to broader market risks. The Fund may invest in securities of issuers, which may also be considered counterparties as trading partners in other transactions. This may increase the risk of loss in the event of default or bankruptcy by the counterparty or if the counterparty otherwise fails to meet its contractual obligations. The Fund’s subadviser attempts to mitigate counterparty risk by (i) periodically assessing the creditworthiness of its trading partners, (ii) monitoring and/or limiting the amount of its net exposure to each individual counterparty based on its assessment and (iii) requiring collateral from the counterparty for certain transactions. Market events and changes in overall economic conditions may impact the assessment of such counterparty risk by the subadviser. In addition, declines in the values of underlying collateral received may expose the Fund to increased risk of loss.

With exchange traded and centrally cleared derivatives, there is less counterparty risk to the Fund since the exchange or clearinghouse, as counterparty to such instruments, guarantees against a possible default. The clearinghouse stands between the buyer and the seller of the contract; therefore, the credit risk is limited to failure of the clearinghouse. While offset rights may exist under applicable law, the Fund does not have a contractual right of offset against a clearing broker or clearinghouse in the event of a default of the clearing broker or clearinghouse.

The Fund has entered into master agreements, such as an International Swaps and Derivatives Association, Inc. Master Agreement (“ISDA Master Agreement”) or similar agreement, with certain of its derivative counterparties that govern over-the-counter (“OTC”) derivatives and provide for general obligations, representations, agreements, collateral posting terms, netting provisions in the event of default or termination and credit related contingent features. The credit related contingent features include, but are not limited to, a percentage decrease in the Fund’s net assets or net asset value per share over a specified period of time. If these credit related contingent features were triggered, the derivatives counterparty could terminate the positions and demand payment or require additional collateral.

Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative financial instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. However, absent an event of default by the counterparty or a termination of the agreement, the terms of the ISDA Master Agreements do not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the Fund and the applicable counterparty. The enforceability of the right to offset may vary by jurisdiction.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Collateral requirements differ by type of derivative. Collateral or margin requirements are set by the broker or exchange clearinghouse for exchange traded derivatives while collateral terms are contract specific for OTC traded derivatives. Cash collateral that has been pledged to cover obligations of the Fund under derivative contracts, if any, will be reported separately in the Statement of Assets and Liabilities. Securities pledged as collateral, if any, for the same purpose are noted in the Schedule of Investments.

As of December 31, 2025, the Fund did not have any open OTC derivative transactions with credit related contingent features in a net liability position.

(n) Security transactions and investment income. Security transactions are accounted for on a trade date basis. Interest income (including interest income from payment-in-kind securities) is recorded on the accrual basis. Amortization of premiums and accretion of discounts on debt securities are recorded to interest income over the lives of the respective securities, except for premiums on certain callable debt securities, which are amortized to the earliest call date. The Fund accretes market discounts and amortizes market premiums on debt securities using the effective yield method. Accretion of market discounts and amortization of market premiums requires the application of several assumptions including, but not limited to, prepayment assumptions and default rate assumptions, which are reevaluated not less than semi-annually and require the use of a significant amount of judgment. Principal write-offs are generally treated as realized losses. The Fund’s accretion of discounts and amortization of premiums for U.S. federal and other tax purposes is likely to differ from the financial accounting treatment under GAAP of these items as described above. Dividend income is recorded on the ex-dividend date for dividends received in cash and/or securities. The cost of investments sold is determined by use of the specific identification method. To the extent any issuer defaults or a credit event occurs that impacts the issuer, the Fund may halt any additional interest income accruals and consider the realizability of interest accrued up to the date of default or credit event.

(o) Partnership accounting policy. The Fund records its pro rata share of the income (loss) and capital gains (losses), to the extent of distributions it has received, allocated from the underlying partnerships and accordingly adjusts the cost basis of the underlying partnerships for return of capital. These amounts are included in the Fund’s Statement of Operations.

(p) Distributions to shareholders. Distributions from net investment income of the Fund, if any, are declared quarterly and paid on a monthly basis. Distributions of net realized gains, if any, are declared at least annually. The actual source of the Fund’s monthly distributions may be from net investment income, realized capital gains, return of capital or a combination thereof. Distributions to shareholders of the Fund are recorded on the ex-dividend date and are determined in accordance with income tax regulations, which may differ from GAAP.

(q) Compensating balance arrangements. The Fund had an arrangement with its custodian bank whereby a portion of the custodian’s fees was paid indirectly by credits earned on the Fund’s cash on deposit with the bank. Effective April 1, 2025, any cash on

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Notes to financial statements (cont’d)

deposit with the bank will earn interest and be recognized as interest income on the Statement of Operations.

(r) Federal and other taxes. It is the Fund’s policy to comply with the federal income and excise tax requirements of the Internal Revenue Code of 1986 (the “Code”), as amended, applicable to regulated investment companies. Accordingly, the Fund intends to distribute its taxable income and net realized gains, if any, to shareholders in accordance with timing requirements imposed by the Code. Therefore, no federal or state income tax provision is required in the Fund’s financial statements.

Management has analyzed the Fund’s tax positions taken on income tax returns for all open tax years and has concluded that as of December 31, 2025, no provision for income tax is required in the Fund’s financial statements. The Fund’s federal and state income and federal excise tax returns for the prior three fiscal years are subject to examination by the Internal Revenue Service and state departments of revenue.

(s) Reclassification. GAAP requires that certain components of net assets be reclassified to reflect permanent differences between financial and tax reporting. These reclassifications have no effect on net assets or net asset value per share. During the current year, the following reclassifications have been made:

	Total Distributable Earnings (Loss)	Paid-in Capital
(a)	$62,858	$(62,858)

(a)

Reclassifications are due to prior year true up.

2. Investment management agreement and other transactions with affiliates

Franklin Templeton Fund Adviser, LLC (“FTFA”) is the Fund’s investment manager. Western Asset Management Company, LLC (“Western Asset”) and Western Asset Management Company Limited (“Western Asset London”) are the Fund’s subadvisers. FTFA, Western Asset and Western Asset London are indirect, wholly-owned subsidiaries of Franklin Resources, Inc. (“Franklin Resources”).

Under the investment management agreement, the Fund pays an investment management fee, calculated daily and paid monthly, at an annual rate of 1.00% of the Fund’s average daily managed assets. Managed assets are net assets plus the proceeds of any outstanding borrowings used for leverage and assets attributable to preferred stock that may be outstanding.

FTFA provides administrative and certain oversight services to the Fund. FTFA delegates to Western Asset the day-to-day portfolio management of the Fund. Western Asset London provides certain subadvisory services to the Fund relating to currency transactions and investments in non-U.S. dollar denominated debt securities. For its services, FTFA pays Western Asset a fee monthly, at an annual rate equal to 70% of the net management fee it receives from the Fund. In turn, Western Asset pays Western Asset London a monthly subadvisory fee in an amount equal to 100% of the management fee paid to Western Asset on the assets that Western Asset allocates to Western Asset London to manage.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

During periods in which the Fund utilizes financial leverage, the fees paid to FTFA will be higher than if the Fund did not utilize leverage because the fees are calculated as a percentage of the Fund’s assets, including those investments purchased with leverage.

The manager has agreed to waive the Fund’s management fee to an extent sufficient to offset the net management fee payable in connection with any investment in an affiliated money market fund (the “affiliated money market fund waiver”).

FTFA implemented an investment management fee waiver of 0.20% that terminated on January 2, 2022. Effective January 3, 2022, FTFA implemented an investment management fee waiver of 0.05% that expired on May 31, 2023. Effective June 1, 2023, FTFA implemented an investment management fee waiver of 0.10% that continued until May 31, 2024. Effective June 1, 2024, FTFA implemented an investment management fee waiver of 0.05% that expired on May 31, 2025.

During the year ended December 31, 2025, fees waived and/or expenses reimbursed amounted to $55,928, which included an affiliated money market fund waiver of $2,947.

All officers and one Director of the Fund are employees of Franklin Resources or its affiliates and do not receive compensation from the Fund.

3. Investments

During the year ended December 31, 2025, the aggregate cost of purchases and proceeds from sales of investments (excluding short-term investments) and U.S. Government & Agency Obligations were as follows:

	Investments	U.S. Government & Agency Obligations
Purchases	$45,718,251	$5,534,249
Sales	45,395,928	8,432,581

At December 31, 2025, the aggregate cost of investments and the aggregate gross unrealized appreciation and depreciation of investments for federal income tax purposes were as follows:

	Cost	Gross Unrealized Appreciation	Gross Unrealized Depreciation	Net Unrealized Appreciation (Depreciation)
Securities	$258,617,901	$13,687,242	$(18,343,403)	$(4,656,161)
Futures contracts	—	111,994	—	111,994

Transactions in reverse repurchase agreements for the Fund during the year ended December 31, 2025, were as follows:

Average Daily Balance*	Weighted Average Interest Rate*	Maximum Amount Outstanding
$119,331,479	6.224%	$123,998,000

* Averages based on the number of days that the Fund had reverse repurchase agreements outstanding.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Notes to financial statements (cont’d)

Interest rates on reverse repurchase agreements ranged from 5.749% to 6.816% during the year ended December 31, 2025. Interest expense incurred on reverse repurchase agreements totaled $7,530,514.

4. Derivative instruments and hedging activities

Below is a table, grouped by derivative type, that provides information about the fair value and the location of derivatives within the Statement of Assets and Liabilities at December 31, 2025.

ASSET DERIVATIVES1
	Interest Rate Risk
Futures contracts2	$111,994

1	Generally, the balance sheet location for asset derivatives is receivables/net unrealized appreciation and for liability derivatives is payables/net unrealized depreciation.
2	Includes cumulative unrealized appreciation (depreciation) of futures contracts as reported in the Schedule of Investments. Only net variation margin is reported within the receivables and/or payables on the Statement of Assets and Liabilities.

The following tables provide information about the effect of derivatives and hedging activities on the Fund’s Statement of Operations for the year ended December 31, 2025. The first table provides additional detail about the amounts and sources of gains (losses) realized on derivatives during the period. The second table provides additional information about the change in net unrealized appreciation (depreciation) resulting from the Fund’s derivatives and hedging activities during the period.

AMOUNT OF NET REALIZED GAIN (LOSS) ON DERIVATIVES RECOGNIZED
	Interest Rate Risk	Credit Risk	Total
Purchased options1	—	$(60,300 )	$(60,300 )
Futures contracts	$(270,244 )	—	(270,244 )
Written options	—	24,120	24,120
Swap contracts	—	(328,430 )	(328,430 )
Total	$(270,244 )	$(364,610 )	$(634,854 )

1	Net realized gain (loss) from purchased options is reported in Net Realized Gain (Loss) From Investment transactions in unaffiliated securities in the Statement of Operations.

CHANGE IN NET UNREALIZED APPRECIATION (DEPRECIATION) ON DERIVATIVES RECOGNIZED
	Interest Rate Risk
Futures contracts	$(195,570 )

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

During the year ended December 31, 2025, the volume of derivative activity for the Fund was as follows:

	Average Market Value*
Purchased options†	$2,695
Written options†	820
Futures contracts (to sell)	16,484,548
	Average Notional Balance**
Credit default swap contracts (buy protection)†	$769,231

*	Based on the average of the market values at each month-end during the period.
†	At December 31, 2025, there were no open positions held in this derivative.
**	Based on the average of the notional amounts at each month-end during the period.

5. Distributions subsequent to December 31, 2025

The following distributions have been declared by the Board and are payable subsequent to the period end of this report:

Record Date	Payable Date	Amount
12/31/2025	12/23/2025	$0.1200
1/23/2026	1/30/2026	$0.1200
2/20/2026	2/27/2026	$0.1200
3/24/2026	3/31/2026	$0.1200
4/23/2026	4/30/2026	$0.1200
5/21/2026	5/29/2026	$0.1200

6. Stock repurchase program

On November 16, 2015, the Fund announced that the Board had authorized the Fund to repurchase in the open market up to approximately 10% of the Fund’s outstanding common stock when the Fund’s shares are trading at a discount to net asset value. The Board has directed management of the Fund to repurchase shares of common stock at such times and in such amounts as management reasonably believes may enhance stockholder value. The Fund is under no obligation to purchase shares at any specific discount levels or in any specific amounts.

During the year ended December 31, 2025, and the year ended December 31, 2024, the Fund did not repurchase any shares under this repurchase program.

Since the commencement of the stock repurchase program through December 31, 2025, the Fund repurchased 81,710 shares or 0.71% of its common shares outstanding for a total amount of $898,285.

7. Capital shares

The Fund filed a registration statement with the Securities and Exchange Commission, effective May 4, 2021, authorizing the Fund to offer and sell shares of common stock having an aggregate offering price of up to $43,283,467. The Fund renewed its shelf registration

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Notes to financial statements (cont’d)

with an authorization to offer and sell an additional $75 million. This registration statement became effective on August 28, 2024. Under the equity shelf offering program, the Fund, subject to market conditions, may raise additional equity capital from time to time in varying amounts and offering methods at a net price at or above the Fund’s then-current net asset value per common share. Costs incurred by the Fund in connection with the shelf offering are recorded as a prepaid expense. These costs are amortized on a pro-rata basis as shares are sold and are presented as a reduction to the Net proceeds from sale of shares on the Statement of Changes in Net Assets. Any deferred charges remaining at the end of the life of the shelf offering period will be expensed. For the year ended December 31, 2025, the Fund sold 31,986 shares of common stock and the proceeds from such sales were $379,235, net of offering costs and sales charges of $644 and $3,837, respectively.

8. Transactions with affiliated company

As defined by the 1940 Act, an affiliated company is one in which the Fund owns 5% or more of the outstanding voting securities, or a company which is under common ownership or control with the Fund. The following company was considered an affiliated company for all or some portion of the year ended December 31, 2025. The following transactions were effected in such company for the year ended December 31, 2025.

	Affiliate Value at December 31, 2024	Purchased		Sold
	Affiliate Value at December 31, 2024	Cost	Shares	Proceeds	Shares
Western Asset Premier Institutional Government Reserves, Premium Shares	$595,663	$65,293,871	65,293,871	$65,060,557	65,060,557

(cont’d)	Realized Gain (Loss)	Dividend Income	Net Increase (Decrease) in Unrealized Appreciation (Depreciation)	Affiliate Value at December 31, 2025
Western Asset Premier Institutional Government Reserves, Premium Shares	—	$120,151	—	$828,977

9. Income tax information and distributions to shareholders

The tax character of distributions paid during the fiscal years ended December 31, was as follows:

	2025	2024
Distributions paid from:
Ordinary income	$13,360,788	$15,517,236
Tax return of capital	4,303,244	1,843,358
Total distributions paid	$17,664,032	$17,360,594

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

As of December 31, 2025, the components of distributable earnings (loss) on a tax basis were as follows:

Deferred capital losses*	$(53,890,355)
Other book/tax temporary differences(a)	(111,994)
Unrealized appreciation (depreciation)(b)	(4,544,165)
Total distributable earnings (loss) — net	$(58,546,514)

*	These capital losses have been deferred in the current year as either short-term or long-term losses. The losses will be deemed to occur on the first day of the next taxable year in the same character as they were originally deferred and will be available to offset future taxable capital gains.
(a)	Other book/tax temporary differences are attributable to the realization for tax purposes of unrealized gains (losses) on futures and book/tax differences in the timing of the deductibility of various expenses.
(b)	The difference between book-basis and tax-basis unrealized appreciation (depreciation) is attributable to the tax deferral of losses on wash sales and other book/tax basis adjustments.

10. Operating segments

The Fund operates as a single operating segment, which is an investment portfolio. A management group assigned to the Fund within the Fund’s investment manager serves as the Chief Operating Decision Maker (“CODM”) and is responsible for evaluating the Fund’s operating results and allocating resources in accordance with the Fund’s investment strategy. Internal reporting provided to the CODM aligns with the accounting policies and measurement principles used in the financial statements.

For information regarding segment assets, segment profit or loss, and significant expenses, refer to the Statement of Assets and Liabilities and the Statement of Operations, along with the related Notes to Financial Statements. The Fund’s Schedule of Investments provides details of the Fund’s investments that generate returns such as interest, dividends, and realized and unrealized gains or losses. Performance metrics, including portfolio turnover and expense ratios, are disclosed in the Financial Highlights.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Report of independent registered public accounting firm

To the Board of Directors and Shareholders of Western Asset Mortgage Opportunity Fund Inc.

Opinion on the Financial Statements

We have audited the accompanying statement of assets and liabilities, including the schedule of investments, of Western Asset Mortgage Opportunity Fund Inc. (the “Fund”) as of December 31, 2025, the related statements of operations and cash flows for the year ended December 31, 2025, the statement of changes in net assets for each of the two years in the period ended December 31, 2025, including the related notes, and the financial highlights for each of the five years in the period ended December 31, 2025 (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of December 31, 2025, the results of its operations and its cash flows for the year then ended, the changes in its net assets for each of the two years in the period ended December 31, 2025 and the financial highlights for each of the five years in the period ended December 31, 2025 in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of December 31, 2025 by correspondence with the custodian, agent banks and brokers. We believe that our audits provide a reasonable basis for our opinion.

/s/ PricewaterhouseCoopers LLP

Baltimore, Maryland
February 20, 2026

We have served as the auditor of one or more investment companies in the Franklin Templeton Group of Funds since 1948.

Western Asset Mortgage Opportunity Fund Inc. 2025 Annual Report

Additional shareholder information (unaudited)

Results of annual meeting of shareholders

The Annual Meeting of Shareholders of Western Asset Mortgage Opportunity Fund Inc. was held on October 17, 2025 for the purpose of considering and voting upon the proposals presented at the Meeting. The following table provides information concerning the matters voted upon at the Meeting:

Election of directors

Nominees	FOR	WITHHELD	ABSTAIN
Robert D. Agdern	6,860,287	668,060	75,564
Eileen A. Kamerick	6,897,778	649,745	56,388
Peter Mason	6,840,932	687,181	75,798

At the Meeting, Messrs. Agdern and Mason and Ms. Kamerick were each duly elected by the shareholders to serve as Class III Directors of the Fund until the 2028 Annual Meeting of Shareholders, or until their successors have been duly elected and qualified or until their resignation or are otherwise removed.

At December 31, 2025, in addition to Messrs. Agdern and Mason and Ms. Kamerick, the other Directors of the Fund were as follows:

Carol L. Colman
Anthony Grillo
Nisha Kumar
Hillary A. Sale
Jane Trust

Ratification of Selection of Independent Registered Public Accountants

To ratify the selection of PricewaterhouseCoopers LLP (“PwC”) as independent registered public accountants of the Fund for the fiscal year ended December 31, 2025.

FOR	AGAINST	ABSTAIN	BROKER NON-VOTES
7,504,294	65,232	34,385	N/A

Western Asset Mortgage Opportunity Fund Inc.

Additional information (unaudited)

Information about Directors and Officers

The business and affairs of Western Asset Mortgage Opportunity Fund Inc. (the “Fund”) are conducted by management under the supervision and subject to the direction of its Board of Directors. The business address of each Director is c/o Jane Trust, Franklin Templeton, One Madison Avenue, 17th Floor, New York, NY 10010.

Information pertaining to the Directors and officers of the Fund is set forth below. The Fund’s annual proxy statement includes additional information about Directors and is

available, without charge, upon request by calling the Fund at 1-888-777-0102.

Independent Directors†
Robert D. Agdern
Year of birth	1950
Position(s) held with Fund1	Director and Member of Nominating, Audit, Compensation and Pricing and Valuation Committees, and Compliance Liaison, Class III
Term of office1 and year service began	Since 2015
Principal occupation(s) during the past five years	Member of the Advisory Committee of the Dispute Resolution Research Center at the Kellogg Graduate School of Business, Northwestern University (2002 to 2016); formerly, Deputy General Counsel responsible for western hemisphere matters for BP PLC (1999 to 2001); Associate General Counsel at Amoco Corporation responsible for corporate, chemical, and refining and marketing matters and special assignments (1993 to 1998) (Amoco merged with British Petroleum in 1998 forming BP PLC)
Number of portfolios in fund complex2 overseen by Director (including the Fund)	21
Other board memberships held by Director during the past five years	None
Carol L. Colman
Year of birth	1946
Position(s) held with Fund1	Director and Member of Nominating, Audit and Compensation Committees, and Chair of Pricing and Valuation Committee, Class I
Term of office1 and year service began	Since 2010
Principal occupation(s) during the past five years	President, Colman Consulting Company (consulting)
Number of portfolios in fund complex2 overseen by Director (including the Fund)	21
Other board memberships held by Director during the past five years	None

Western Asset Mortgage Opportunity Fund Inc.

Independent Directors† (cont’d)
Anthony Grillo
Year of birth	1955
Position(s) held with Fund1	Director and Member of Nominating, Audit, Compensation and Pricing and Valuation Committees, Class I
Term of office1 and year service began	Since 2024
Principal occupation(s) during the past five years	Retired; Founder, Managing Director and Partner of American Securities Opportunity Funds (private equity and credit firm) (2006 to 2018); formerly, Senior Managing Director of Evercore Partners Inc. (investment banking) (2001 to 2004); Senior Managing Director of Joseph Littlejohn & Levy, Inc. (private equity firm) (1999 to 2001); Senior Managing Director of The Blackstone Group L.P. (private equity and credit firm) (1991 to 1999)
Number of portfolios in fund complex2 overseen by Director (including the Fund)	21
Other board memberships held by Director during the past five years	Director of Littelfuse, Inc. (electronics manufacturing) (since 1991); formerly, Director of Oaktree Acquisition Corp. II (2020 to 2022); Director of Oaktree Acquisition Corp. (2019 to 2021)
Eileen A. Kamerick
Year of birth	1958
Position(s) held with Fund1	Chair (since November 15, 2024) and Member of Nominating, Compensation, Pricing and Valuation and Audit Committees, Class III
Term of office1 and year service began	Since 2013
Principal occupation(s) during the past five years	Chief Executive Officer, The Governance Partners, LLC (consulting firm) (since 2015); National Association of Corporate Directors Board Leadership Fellow (since 2016, with Directorship Certification since 2019) and NACD 2022 Directorship 100 honoree; Adjunct Professor, Georgetown University Law Center (since 2021); Adjunct Professor, The University of Chicago Law School (since 2018); Adjunct Professor, University of Iowa College of Law (since 2007); formerly, Chief Financial Officer, Press Ganey Associates (health care informatics company) (2012 to 2014); Managing Director and Chief Financial Officer, Houlihan Lokey (international investment bank) and President, Houlihan Lokey Foundation (2010 to 2012)
Number of portfolios in fund complex2 overseen by Director (including the Fund)	21
Other board memberships held by Director during the past five years	Director, VALIC Company I (since October 2022); Director of ACV Auctions Inc. (since 2021); Director of Associated Banc-Corp (financial services company) (since 2007); formerly, Director of Hochschild Mining plc (precious metals company) (2016 to 2023); formerly Trustee of AIG Funds and Anchor Series Trust (2018 to 2021)

Western Asset Mortgage Opportunity Fund Inc.

Additional information (unaudited) (cont’d)

Information about Directors and Officers

Independent Directors† (cont’d)
Nisha Kumar
Year of birth	1970
Position(s) held with Fund1	Director and Member of Nominating, Compensation and Pricing and Valuation Committees, and Chair of Audit Committee, Class II
Term of office1 and year service began	Since 2019
Principal occupation(s) during the past five years	Formerly, Managing Director and the Chief Financial Officer and Chief Compliance Officer of Greenbriar Equity Group, LP (2011 to 2021); formerly, Chief Financial Officer and Chief Administrative Officer of Rent the Runway, Inc. (2011); Executive Vice President and Chief Financial Officer of AOL LLC, a subsidiary of Time Warner Inc. (2007 to 2009); Member of the Council on Foreign Relations
Number of portfolios in fund complex2 overseen by Director (including the Fund)	21
Other board memberships held by Director during the past five years	Director of Stonepeak-Plus Infrastructure Fund LP (since 2025); Director of Birkenstock Holding plc (since 2023); Director of The India Fund, Inc. (since 2016); formerly, Director of Aberdeen Income Credit Strategies Fund (2017 to 2018); and Director of The Asia Tigers Fund, Inc. (2016 to 2018)
Peter Mason
Year of birth	1959
Position(s) held with Fund1	Director and Member of Audit, Nominating and Pricing and Valuation Committees, and Chair of Compensation Committee, Class III
Term of office1 and year service began	Since 2024
Principal occupation(s) during the past five years	Arbitrator and Mediator (self-employed) (since 2021); formerly, Global General Counsel of UNICEF (intergovernmental organization) (1998 to 2021)
Number of portfolios in fund complex2 overseen by Director (including the Fund)	21
Other board memberships held by Director during the past five years	Chairman of University of Sydney USA Foundation (since 2020); Director of the Radio Workshop US, Inc. (since 2023)

Western Asset Mortgage Opportunity Fund Inc.

Independent Directors† (cont’d)
Hillary A. Sale
Year of birth	1961
Position(s) held with Fund1	Director and Member of Audit, Compensation and Pricing and Valuation Committees, and Chair of Nominating Committee, Class II
Term of office1 and year service began	Since 2024
Principal occupation(s) during the past five years	Agnes Williams Sesquicentennial Professor of Leadership and Corporate Governance, Georgetown Law; and Professor of Management, McDonough School of Business (since 2018); formerly, Associate Dean for Strategy, Georgetown Law (2020 to 2023); National Association of Corporate Directors Board Faculty Member (since 2021); formerly, a Member of the Board of Governors of FINRA (2016 to 2022)
Number of portfolios in fund complex2 overseen by Director (including the Fund)	21
Other board memberships held by Director during the past five years	Director of CBOE U.S. Securities Exchanges, CBOE Futures Exchange, and CBOE SEF, Director (since 2022); Advisory Board Member of Foundation Press (academic book publisher) (since 2019); Chair of DirectWomen Board Institute (since 2019); formerly, Member of DirectWomen Board (nonprofit) (2007 to 2022)

Interested Director and Officer
Jane Trust, CFA3
Year of birth	1962
Position(s) held with Fund1	Director, President and Chief Executive Officer, Class II
Term of office1 and year service began	Since 2015
Principal occupation(s) during the past five years	Senior Vice President, Fund Board Management, Franklin Templeton (since 2020); Officer and/or Trustee/Director of 118 funds associated with FTFA or its affiliates (since 2015); Trustee of Putnam Family of Funds consisting of 105 portfolios; President and Chief Executive Officer of FTFA (since 2015); formerly, Senior Managing Director (2018 to 2020) and Managing Director (2016 to 2018) of Legg Mason & Co., LLC (“Legg Mason & Co.”); and Senior Vice President of FTFA (2015)
Number of portfolios in fund complex2 overseen by Director (including the Fund)	Trustee/Director of Franklin Templeton funds consisting of 118 portfolios; Trustee of Putnam Family of Funds consisting of 105 portfolios
Other board memberships held by Director during the past five years	None

Western Asset Mortgage Opportunity Fund Inc.

Additional information (unaudited) (cont’d)

Information about Directors and Officers

Additional Officers
Fred Jensen
Franklin Templeton One Madison Avenue, 17th Floor, New York, NY 10010
Year of birth	1963
Position(s) held with Fund1	Chief Compliance Officer
Term of office1 and year service began	Since 2020
Principal occupation(s) during the past five years	Director - Global Compliance of Franklin Templeton (since 2020); Managing Director of Legg Mason & Co. (2006 to 2020); Director of Compliance, Legg Mason Office of the Chief Compliance Officer (2006 to 2020); formerly, Chief Compliance Officer of Legg Mason Global Asset Allocation (prior to 2014); Chief Compliance Officer of Legg Mason Private Portfolio Group (prior to 2013); formerly, Chief Compliance Officer of The Reserve Funds (investment adviser, funds and broker-dealer) (2004) and Ambac Financial Group (investment adviser, funds and broker- dealer) (2000 to 2003)
Marc A. De Oliveira
Franklin Templeton 100 First Stamford Place, 6th Floor, Stamford, CT 06902
Year of birth	1971
Position(s) held with Fund1	Secretary and Chief Legal Officer
Term of office1 and year service began	Since 2023
Principal occupation(s) during the past five years	Associate General Counsel of Franklin Templeton (since 2020); Secretary and Chief Legal Officer (since 2020) and Assistant Secretary of certain funds in the Franklin Templeton fund complex (since 2006); formerly, Managing Director (2016 to 2020) and Associate General Counsel of Legg Mason & Co. (2005 to 2020)
Thomas C. Mandia
Franklin Templeton 100 First Stamford Place, 6th Floor, Stamford, CT 06902
Year of birth	1962
Position(s) held with Fund1	Senior Vice President
Term of office1 and year service began	Since 2022
Principal occupation(s) during the past five years	Senior Associate General Counsel to Franklin Templeton (since 2020); Senior Vice President (since 2020) and Assistant Secretary of certain funds in the Franklin Templeton fund complex (since 2006); Secretary of FTFA (since 2006); Secretary of LMAS (since 2002) and LMFAM (formerly registered investment advisers) (since 2013); formerly, Managing Director and Deputy General Counsel of Legg Mason & Co. (2005 to 2020)

Western Asset Mortgage Opportunity Fund Inc.

Additional Officers (cont’d)
Christopher Berarducci
Franklin Templeton One Madison Avenue, 17th Floor, New York, NY 10010
Year of birth	1974
Position(s) held with Fund1	Treasurer and Principal Financial Officer
Term of office1 and year service began	Since 2019
Principal occupation(s) during the past five years	Vice President, Fund Administration and Reporting, Franklin Templeton (since 2020); Treasurer (since 2010) and Principal Financial Officer (since 2019) of certain funds associated with Legg Mason & Co. or its affiliates; formerly, Managing Director (2020), Director (2015 to 2020), and Vice President (2011 to 2015) of Legg Mason & Co.
Jeanne M. Kelly
Franklin Templeton One Madison Avenue, 17th Floor, New York, NY 10010
Year of birth	1951
Position(s) held with Fund1	Senior Vice President
Term of office1 and year service began	Since 2010
Principal occupation(s) during the past five years	U.S. Fund Board Team Manager, Franklin Templeton (since 2020); Senior Vice President of certain funds associated with Legg Mason & Co. or its affiliates (since 2007); Senior Vice President of FTFA (since 2006); President and Chief Executive Officer of LMAS and LMFAM (since 2015); formerly, Managing Director of Legg Mason & Co. (2005 to 2020); and Senior Vice President of LMFAM (2013 to 2015)

†Directors who are not “interested persons” of the Fund within the meaning of Section 2(a)(19) of the 1940 Act.

1The Fund’s Board of Directors is divided into three classes: Class I, Class II and Class III. The terms of office of the Class I, II and III Directors expire at the Annual Meetings of Stockholders in the year 2026, year 2027 and year 2028, respectively, or thereafter in each case when their respective successors are duly elected and qualified. The Fund’s executive officers are chosen each year, to hold office until their successors are duly elected and qualified.

2The term “fund complex” means two or more registered investment companies that:

(a) hold themselves out to investors as related companies for purposes of investment and investor services; or

(b) have a common investment adviser or have an investment adviser that is an affiliated person of the investment adviser of any of the other registered investment companies.

3Ms. Trust is an “interested person” of the Fund as defined in the 1940 Act because Ms. Trust is an officer of FTFA and certain of its affiliates.

Western Asset Mortgage Opportunity Fund Inc.

Annual chief executive officer and

principal financial officer certifications (unaudited)

The Fund’s Chief Executive Officer (“CEO”) has submitted to the NYSE the required annual certification and the Fund also has included the Certifications of the Fund’s CEO and Principal Financial Officer required by Section 302 of the Sarbanes-Oxley Act in the Fund’s Form N-CSR filed with the SEC for the period of this report.

Western Asset Mortgage Opportunity Fund Inc.

Other shareholder communications regarding accounting matters (unaudited)

The Fund’s Audit Committee has established guidelines and procedures regarding the receipt, retention and treatment of complaints regarding accounting, internal accounting controls or auditing matters (collectively, “Accounting Matters”). Persons with complaints or concerns regarding Accounting Matters may submit their complaints to the Chief Compliance Officer (“CCO”). Persons who are uncomfortable submitting complaints to the CCO, including complaints involving the CCO, may submit complaints directly to the Fund’s Audit Committee Chair. Complaints may be submitted on an anonymous basis.

The CCO may be contacted at:
Franklin Resources Inc.
Compliance Department
One Madison Avenue, 17th Floor
New York, NY 10010

Complaints may also be submitted by telephone at 1-800-742-5274. Complaints submitted through this number will be received by the CCO.

Western Asset Mortgage Opportunity Fund Inc.

Important information to shareholders (unaudited)

UPDATED DISCLOSURES FOR THE FUND

The following additional information is provided for the Fund as of the fiscal year ended December 31, 2025.

Summary of Fund Expenses

Sales Load (as a percentage of offering price)(1)	1.00 %
Offering Expense (as a percentage of offering price)(2)	0.09 %
Dividend Reinvestment Plan Fees(3)	$5.00

Annual Operating Expenses

	Percentage of Net Assets Attributable to Common Shares
Management Fees(4)	1.88%
Interest Payments on Borrowed Funds(5)	5.54%
Other Expenses(6)	0.49%
Total Annual Fund Operating Expenses	7.91%

(1) Represents the estimated commission with respect to the Common Stock being sold in at-the-market offerings. JonesTrading will be entitled to compensation of up to 1.00% of the gross proceeds of the sale of any Common Stock under the Sales Agreement, with the exact amount of such compensation to be mutually agreed upon in writing by the Fund and JonesTrading from time to time.

(2) Costs incurred by the Fund in connection with the shelf offering are recorded as a prepaid expense. These costs are amortized on a pro-rata basis as shares are sold and are presented as a reduction to the net proceeds from sale of shares. Any deferred charges remaining at the end of the life of the shelf offering period will be expensed.

(3) Common Stockholders will pay brokerage charges if they direct the Plan Agent to sell Common Stock held in a dividend reinvestment account. There are no fees charged to stockholders for participating in the Fund’s dividend reinvestment plan. However, stockholders participating in the Plan that elect to sell their shares obtained pursuant to the plan would pay $5.00 per transaction to sell shares.

(4) The Investment Manager receives an annual fee, payable monthly, in an amount equal to 1.00% of the Fund’s average daily Managed Assets. “Managed Assets” means net assets plus the amount of any outstanding borrowings used for leverage and assets attributable to any preferred stock that may be outstanding. If the Fund were to use leverage, the amount of management fees paid to the Investment Manager will be higher than if the Fund does not use leverage because the fees paid are calculated on the Funds Managed Assets.

(5) The Fund enters into reverse repurchase agreements. The expenses and rates associated with leverage may vary as and when Borrowings or issuances of Preferred Stock are made. “Interest Payments on Borrowed Funds” reflects an annualized interest charge based on the interest rate and borrowings in effect on December 31, 2025.

(6) Expenses based on amounts incurred in the fiscal year ended December 31, 2025.

Examples

An investor would pay the following expenses (including a sales load of $10.00 and offering costs of $0.90) on a $1,000 investment in the Fund, assuming a 5% annual return:

One Year	Three Years	Five Years	Ten Years
$88	$236	$376	$691

The above table and example are intended to assist investors in understanding the various costs and expenses directly or indirectly associated with investing in Shares of the Fund. The “Example” assumes that all dividends and other distributions are reinvested at net

Western Asset Mortgage Opportunity Fund Inc.

asset value and that the percentage amounts listed in the table above under Total Annual Operating Expenses remain the same in the years shown. The above table and example and the assumption in the example of a 5% annual return are required by regulations of the SEC that are applicable to all investment companies; the assumed 5% annual return is not a prediction of, and does not represent, the projected or actual performance of the Fund’s Common Shares.

The example should not be considered a representation of past or future expenses, and the Fund’s actual expenses may be greater than or less than those shown. The Fund’s actual rate of return may be greater or less than the hypothetical 5% return shown in the example.

Market Price and Net Asset Valuation (NAV) Information

The Fund’s Common Stock is traded on the NYSE under the symbol “DMO”. The below table details for the period indicated the high and low closing market prices, the NAV, and premium to or discount from NAV, on the date of each of the high and low market prices.

	Quarterly Closing Market Price		Quarterly Closing NAV Price per Common share on Date of Market Price		Quarterly Closing Premium/(Discount) on Date of Market Price
	High	Low	High	Low	High	Low
Fiscal Year 2025:
March 31, 2025	$12.06	$11.41	$12.25	$12.04	(1.55)%	(5.23)%
June 30, 2025	$11.98	$10.85	$11.99	$11.93	(0.08)%	(9.05)%
September 30, 2025	$12.10	$11.68	$11.94	$11.81	1.34%	(1.10)%
December 31, 2025	$12.06	$11.00	$11.91	$11.71	1.26%	(6.06)%
Fiscal Year 2024:
March 31, 2024	$11.72	$10.97	$12.31	$12.19	(4.79)%	(10.01)%
June 30, 2024	$12.07	$11.22	$12.24	$12.11	(1.39)%	(7.35)%
September 30, 2024	$12.27	$11.86	$12.24	$12.24	0.25%	(3.15)%
December 31, 2024	$12.29	$11.77	$12.23	$12.03	0.45%	(2.16)%

Source of market prices: NYSE.

The NAV per Common Share on December 31, 2025 was $11.68 and the market price per Common Stock at the close of business on December 31, 2025 was $11.06, representing a (5.31)% discount from such net asset value. As of December 31, 2025, the Fund has 11,427,128 outstanding shares of Common Stock.

Shares of a closed-end investment company may frequently trade at prices lower than NAV. The Fund’s Common Stock has traded in the market below, at and above net asset value since the commencement of the Fund’s operations. However, it has recently been the case that the Fund’s Common Stock has traded at a discount from NAV. The Fund cannot determine the reasons why the Fund’s Common Stock trades at a premium to or discount from NAV, nor can the Fund predict whether its Stock will trade in the future at a premium to or discount from NAV, or the level of any premium or discount. The Board regularly

Western Asset Mortgage Opportunity Fund Inc.

Important information to shareholders (unaudited) (cont’d)

monitors the relationship between the market price and NAV of the Common Stock. If the Common Stock were to trade at a substantial discount to NAV for an extended period of time, the Board may consider the repurchase of the Fund’s Common Stock on the open market, the making of a tender offer for such shares or other programs intended to reduce the discount. The Fund cannot assure you that its Board will decide to take or propose any of these actions, or that share repurchases or tender offers will actually reduce market discount.

Senior Securities Table

The Fund engaged in senior securities during the prior ten years as follows:

Fiscal Year Ended	Total Amount Outstanding	Asset Coverage per 1,000	Average Market Value Per Unit**
Revolving Credit Facility:
December 31, 2025*	N/A	N/A	N/A
December 31, 2024*	N/A	N/A	N/A
December 31, 2023*	N/A	N/A	N/A
December 31, 2022*	N/A	N/A	N/A
December 31, 2021*	N/A	N/A	N/A
December 31, 2020	$45,000,000	$4,667	N/A
December 31, 2019	$98,000,000	$3,089	N/A
December 31, 2018	$99,250,000	$3,035	N/A
December 31, 2017	$101,750,000	$3,185	N/A
December 31, 2016	$101,750,000	$3,124	N/A

* The Fund had open reverse repurchase agreements at December 31, 2025, 2024, 2023, 2022 and 2021.

** Not applicable, as these senior securities were not registered for public trading.

UNRESOLVED STAFF COMMENTS

The Fund believes that there are no material unresolved written comments, received 180 days or more before December 31, 2025, from the Staff of the Securities and Exchange Commission regarding any of its periodic or current reports under the Securities Exchange Act of 1934 or the 1940 Act, or its registration statement.

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited)

Investment Objectives

The Fund’s primary investment objective is to provide current income. As a secondary investment objective, the Fund will seek capital appreciation.

Principal Investment Policies and Strategies

The Fund seeks to achieve its investment objectives by investing primarily in a diverse portfolio of mortgage-backed securities (“MBS”) and mortgage whole loans. Investments in mortgage-backed securities consist primarily of non-agency residential mortgage-backed securities (“RMBS”) and commercial mortgage-backed securities (“CMBS”). The Fund’s investments in mortgage whole loans under normal circumstances will not exceed 20% of its Managed Assets. “Managed Assets” means the net assets of the Fund plus the amount of any Borrowings and assets attributable to Preferred Stock that may be outstanding. A mortgage whole loan is a single mortgage loan issued to a particular borrower and is not securitized. Mortgage whole loans include loans on residential properties such as one to four family dwellings and on commercial properties such as office buildings, shopping centers and other retail properties, hotels and apartment buildings. MBS represent interests in diversified pools of residential or commercial mortgage loans, and typically take the form of pass-through securities or collateralized mortgage obligations (“CMOs”). MBS include, but are not limited to, the following: non-agency RMBS; CMBS; U.S. agency mortgage-backed pass-through securities issued by Government National Mortgage Association, the Federal National Mortgage Association (“Fannie Mae”), the Federal Home Loan Mortgage Corporation (“Freddie Mac”), and other federal agencies, or issues guaranteed by them; delegated underwriting and servicing bonds, including pools of multi-family housing loans issued by Fannie Mae and Freddie Mac; CMOs, including interest only (“IO”), principal only (“PO”) and other mortgage securities backed by U.S. agency or non-agency pass-through securities; mortgage-related asset-backed securities (“ABS”), such as home equity loan-backed securities; MBS credit default swaps (including on the CMBX, TRX and ABX indices) and other derivative instruments related to MBS; inverse floating rate securities, which are derivative interests in MBS; RMBS denominated in currencies other than the U.S. dollar; and repurchase agreements supported by agency MBS; and junior and equity tranches of MBS. The Fund may invest in MBS of any type and of any credit quality, without limitation. The Fund may invest in senior loans, including assignments and participations.

Under normal circumstances, the Fund will invest at least 80% of its Managed Assets in MBS and mortgage whole loans. Derivatives counted towards the Fund’s 80% policy are valued based on market value. The Fund also may invest up to 20% of its Managed Assets in other permitted investments, including cash and cash equivalents; Treasury securities; non-mortgage related ABS (such as collateralized bond obligations, collateralized loan obligations and collateralized debt obligations) backed by various asset classes including, but not limited to, small balance commercial mortgages, aircrafts, automobiles, credit cards, equipment, manufactured housing, franchises, recreational vehicles and student

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

loans; and investment grade and below investment grade fixed income securities including bonds, debentures, notes, commercial paper and other similar types of debt instruments including hybrid securities. The Fund also may invest in any newly developed mortgage-related derivatives that may hereafter become available for mortgage investing.

The Fund may invest in derivative instruments, such as options contracts, futures contracts, options on futures contracts, indexed securities, credit linked notes, credit default swaps and other swap agreements for investment, hedging and risk management purposes; provided that the Fund’s use of derivative instruments, as measured by the total notional amount of all such instruments, will not exceed 20% of its Managed Assets. With respect to this limitation, the Fund may net derivatives with opposite exposure to the same underlying instrument.

Notwithstanding the foregoing, the Fund may invest without limitation in Treasury futures, Eurodollar futures, interest rate swaps, swaptions or similar instruments and combinations thereof. To the extent that the security or index underlying the derivative or synthetic instrument is or is composed of MBS, the Fund will include such derivative and synthetic instruments for the purposes of the Fund’s policy to invest at least 80% of its Managed Assets in MBS and mortgage whole loans. The Fund may sell certain equities or fixed income securities short including, but not limited to, Treasury securities, for investing or hedging purposes.

The Fund may invest in debt investments of any maturity and duration. The Fund may invest a substantial portion of its assets in MBS that were originally rated AAA, but subsequently have been downgraded to below investment grade. The Fund is not limited in its ability to invest in below investment grade or illiquid securities. Below investment grade fixed income securities are rated below “BBB-” by Standard & Poor’s Ratings Services, a division of The McGraw Hill Companies, Inc. or Fitch Ratings, Inc., below “Baa3” by Moody’s Investors Service, Inc. or comparably rated by another nationally recognized statistical rating organization (“NRSRO”) or, if unrated, determined by Western Asset to be of comparable quality. Below investment grade fixed income securities are commonly referred to as “high yield” or “junk” securities and are regarded as having predominantly speculative characteristics with respect to the issuer’s capacity to pay interest and repay principal. In the event that a security receives different ratings from different NRSROs, the Fund will treat the security as being rated in the highest rating category received from an NRSRO. “Illiquid securities” are securities which cannot be sold within seven days in the ordinary course of business at approximately the value at which the Fund has valued the securities. Western Asset does not rely solely on credit ratings, and develops its own analysis of issuer credit quality. The Fund may purchase unrated securities if Western Asset determines that the securities are of comparable quality to rated securities that the Fund may purchase.

Western Asset Mortgage Opportunity Fund Inc.

The Fund may enter into repurchase agreements, in which the Fund purchases a security from a bank or broker-dealer and the bank or broker-dealer agrees to repurchase the security at the Fund’s cost plus interest within a specified time. The Fund may enter into reverse repurchase agreements, under which the Fund will effectively pledge its assets as collateral to secure a short-term loan. The Fund may use leverage through borrowings, including loans from certain financial institutions and/or the issuance of debt securities, and possibly through the issuance of preferred stock. The Fund may use leverage through borrowings in an aggregate amount of up to approximately 50% of the Fund’s total assets less all liabilities and indebtedness not represented by senior securities (for these purposes, “total net assets”) immediately after such borrowings. Furthermore, the Fund may use leverage through the issuance of preferred stock in an aggregate amount of liquidation preference attributable to the preferred stock combined with the aggregate amount of any borrowings of up to approximately 33 1/3% of the Fund’s total net assets immediately after such issuance. Currently, the Fund has no intention to issue notes or debt securities or preferred stock. In addition, the Fund may enter into additional reverse repurchase agreements and/or use similar investment management techniques that may provide leverage, subject to the requirements of Rule 18f-4 under the 1940 Act. Under Rule 18f-4(d), the Fund may enter into reverse repurchase agreements or similar financing transactions in reliance on the rule if the Fund either (i) complies with the asset coverage requirements of Section 18 of the 1940 Act, and combines the aggregate amount of indebtedness associated with all reverse repurchase agreements or similar financing transactions with the aggregate amount of any other senior securities representing indebtedness when calculating its asset coverage ratio; or (ii) treats all reverse repurchase agreements or similar financing transactions as derivatives transactions for all purposes under the rule.

The Fund may purchase securities on a when-issued or delayed delivery basis.

The Fund may invest in securities of other investment companies to the extent that these investments are consistent with the Fund’s investment objective, strategies and policies and permissible under the 1940 Act. The Fund may also invest in securities of private funds that rely on exceptions from the definition of investment company under Sections 3(c)(1) or 3(c)(7) of the 1940 Act, structured finance vehicles or other entities not traditionally considered pooled investment vehicles, and companies that rely on the exceptions from the definition of investment company under Section 3(c)(5)(A) or (B) of the 1940 Act. The Fund may invest in portfolio affiliates of the Fund within the meaning of, and in reliance on, Rules 17a-6 and 17d-1(d)(5) under the 1940 Act. The Fund may invest in other investment companies to gain broad market or sector exposure, including during periods when it has large amounts of uninvested cash or when Western Asset believes that share prices of other investment companies offer attractive values. In general, under the 1940 Act, an investment company may not (i) own more than 3% of the outstanding voting securities of any one registered investment company, (ii) invest more than 5% of its total assets in the

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

securities of any single registered investment company or (iii) invest more than 10% of its total assets in securities of other registered investment companies (the “3-5-10% Limitations”). The Fund may rely on certain exemptions to exceed the 3-5-10% Limitations when investing in another registered investment company (including money market funds) or business development company. To the extent that the Fund invests in another investment company, because other investment companies pay advisory, administrative and service fees that are borne indirectly by investors, such as the Fund, there may be duplication of investment management and other fees.

Principal Risk Factors

The Fund is a diversified, closed-end management investment company designed primarily as a long-term investment and not as a trading vehicle. In accordance with the requirements of the 1940 Act, the Fund reclassified its diversification status from non-diversified to diversified. The Fund is not intended to be a complete investment program and, due to the uncertainty inherent in all investments, there can be no assurance that the Fund will achieve its investment objectives. The Fund’s performance and the value of its investments will vary in response to changes in interest rates, inflation, the financial condition of a security’s issuer, ratings on a security and other market factors. Your securities at any point in time may be worth less than you invested, even after taking into account the reinvestment of Fund dividends and distributions. Below are the principal risks associated with an investment in the Fund.

Investment Risk and Market Risk. An investment in the Fund is subject to investment risk, including the possible loss of the entire amount that you invest. Your investment in the Common Stock represents an indirect investment in the securities owned by the Fund, most of which could be purchased directly. The value of the Fund’s portfolio securities may move up or down, sometimes rapidly and unpredictably. At any point in time, your Common Stock may be worth less than your original investment, even after taking into account the reinvestment of Fund dividends and distributions.

Market Price Discount from Net Asset Value. Shares of closed-end investment companies frequently trade at a discount from their net asset value. This risk is separate and distinct from the risk that the Fund’s net asset value could decrease as a result of its investment activities and may be a greater risk to investors expecting to sell their Common Stock in a relatively short period following completion of this offering. Whether investors will realize gains or losses upon the sale of the Common Stock will depend not upon the Fund’s net asset value but upon whether the market price of the Common Stock at the time of sale is above or below the investor’s purchase price for the Common Stock. Because the market price of the Fund’s Common Stock is affected by factors such as net asset value, dividend or distribution levels (which are dependent, in part, on expenses), supply of and demand for the Fund’s Common Stock, stability of distributions, trading volume of the Fund’s Common

Western Asset Mortgage Opportunity Fund Inc.

Stock, general market and economic conditions, and other factors beyond our control, the Fund cannot predict whether the Common Stock will trade at, below or above net asset value or at, below or above the offering price. The Fund’s Common Stock is designed primarily for long-term investors and you should not view the Fund as a vehicle for trading purposes.

Risks Related to Investments in MBS. Investing in MBS entails various risks: credit risks, liquidity risks, interest rate risks, market risks, operations risks, structural risks, geographical concentration risks, basis risks and legal risks. Most MBS are subject to the significant credit risks inherent in the underlying collateral and to the risk that the servicer fails to perform. MBS are subject to risks associated with their structure and execution, including the process by which principal and interest payments are allocated and distributed to investors, how credit losses affect the issuing vehicle and the return to investors in such MBS, whether the collateral represents a fixed set of specific assets or accounts, whether the underlying collateral assets are revolving or closed-end, under what terms (including maturity of the MBS) any remaining balance in the accounts may revert to the issuing entity and the extent to which the entity that is the actual source of the collateral assets is obligated to provide support to the issuing vehicle or to the investors in such MBS. In addition, concentrations of MBS of a particular type, as well as concentrations of MBS issued or guaranteed by affiliated obligors, serviced by the same servicer or backed by underlying collateral located in a specific geographic region, may subject the MBS to additional risk.

The risks associated with MBS include: (1) credit risk associated with the performance of the underlying mortgage properties and of the borrowers owning these properties; (2) adverse changes in economic conditions and circumstances, which are more likely to have an adverse impact on MBS secured by loans on certain types of commercial properties than on those secured by loans on residential properties; (3) prepayment risk, which can lead to significant fluctuations in value of the MBS; (4) loss of all or part of the premium, if any, paid; and (5) decline in the market value of the security, whether resulting from changes in interest rates, prepayments on the underlying mortgage collateral or perceptions of the credit risk associated with the underlying mortgage collateral. The Fund substantially invests in non-agency RMBS and CMBS each of which are subject to certain specific risks as further described below. Within non-agency RMBS, the fund invests in new-issue non-agency RMBS, legacy non-agency RMBS and CRT. Within non-agency CMBS, the fund invests in single asset single borrower (backed by hotel, industrial, mixed-use, multi-family, office, retail and other), conduit, CRE CLO and agency CMBS subordinate securities.

MBS represent an interest in a pool of mortgages. When market interest rates decline, more mortgages are refinanced and the securities are paid off earlier than expected. Prepayments may also occur on a scheduled basis or due to foreclosure. When market

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

interest rates increase, the market values of MBS decline. At the same time, however, mortgage refinancings and prepayments slow, lengthening the effective maturities of these securities. As a result, the negative effect of the rate increase on the market value of MBS is usually more pronounced than it is for other types of debt securities. In addition, due to increased instability in the credit markets, the market for some MBS has experienced reduced liquidity and greater volatility with respect to the value of such securities, making it more difficult to value such securities.

Moreover, the relationship between borrower prepayments and changes in interest rates may mean some high-yielding mortgage-related and asset-backed securities have less potential for increases in value if market interest rates were to fall than conventional bonds with comparable maturities. In addition, in periods of falling interest rates, the rate of prepayments tends to increase. During such periods, the reinvestment of prepayment proceeds by the Fund will generally be at lower rates than the rates that were carried by the obligations that have been prepaid. Because of these and other reasons, mortgage-related and asset-backed security’s total return and maturity may be difficult to predict precisely. To the extent that the Fund purchases mortgage-related securities at a premium, prepayments (which may be made without penalty) may result in loss of the Fund’s principal investment to the extent of premium paid.

The Fund’s success depends on the Western Asset’s ability to analyze the relationship of changing interest rates on prepayments of the mortgage loans that underlie the Fund’s MBS. Changes in interest rates and prepayments affect the market price of the target assets that the Fund intends to purchase and any target assets that the Fund holds at a given time. As part of the Fund’s overall portfolio risk management, Western Asset will analyze interest rate changes and prepayment trends separately and collectively to assess their effects on the Fund’s investment portfolio. In conducting its analysis, Western Asset will depend on certain assumptions based upon historical trends with respect to the relationship between interest rates and prepayments under normal market conditions. If the recent dislocations in the mortgage market or other developments change the way that prepayment trends have historically responded to interest rate changes, Western Asset’s ability to (1) assess the market value of the Fund’s investment portfolio, (2) implement any hedging strategies and (3) implement techniques to reduce prepayment rate volatility would be significantly affected, which could materially adversely affect the Fund’s financial position and results of operations.

In general, losses on a mortgaged property securing a mortgage loan included in a securitization will be borne first by the equity holder of the property, then by a cash reserve fund or letter of credit, if any, then by the holder of a mezzanine loan or B-Note, if any, then by the “first loss” subordinated security holder (generally, the “B-Piece” buyer) and then by the holder of a higher-rated security. In the event of default and the exhaustion of any

Western Asset Mortgage Opportunity Fund Inc.

equity support, reserve fund, letter of credit, mezzanine loans or B-Notes, and any classes of securities junior to those in which the Fund invests, the Fund will not be able to recover all of its investment in the MBS it purchases. MBS in which the Fund invests may not contain reserve funds, letters of credit, mezzanine loans and/or junior classes of securities. The prices of lower credit quality securities are generally less sensitive to interest rate changes than more highly rated investments, but more sensitive to adverse economic downturns or individual issuer developments.

MBS generally are classified as either CMBS or RMBS, each of which are subject to certain specific risks as further described below. See “—Non-Agency RMBS Risk” and “—CMBS Risk.”

Non-Agency RMBS Risk. Non-agency RMBS are securities issued by non-governmental issuers, the payments on which depend (except for rights or other assets designed to assure the servicing or timely distribution of proceeds to holders of such securities) primarily on the cash flow from residential mortgage loans made to borrowers that are secured (on a first priority basis or second priority basis, subject to permitted liens, easements and other encumbrances) by residential real estate (one- to four- family properties) the proceeds of which are used to purchase real estate and purchase or construct dwellings thereon (or to refinance indebtedness previously so used). Non-agency RMBS have no direct or indirect government guarantees of payment and are subject to various risks as described herein.

Credit-Related Risk Associated with Borrowers on Non-Agency RMBS. Credit-related risk on non-agency RMBS arises from losses due to delinquencies and defaults by the borrowers in payments on the underlying mortgage loans and breaches by originators and servicers of their obligations under the underlying documentation pursuant to which the non-agency RMBS are issued. Residential mortgage loans are obligations of the borrowers thereunder only and are not typically insured or guaranteed by any other person or entity. The rate of delinquencies and defaults on residential mortgage loans and the aggregate amount of the resulting losses will be affected by a number of factors, including general economic conditions, particularly those in the area where the related mortgaged property is located, the level of the borrower’s equity in the mortgaged property and the individual financial circumstances of the borrower. If a residential mortgage loan is in default, foreclosure on the related residential property may be a lengthy and difficult process involving significant legal and other expenses. The net proceeds obtained by the holder on a residential mortgage loan following the foreclosure on the related property may be less than the total amount that remains due on the loan. The prospect of incurring a loss upon the foreclosure of the related property may lead the holder of the residential mortgage loan to restructure the residential mortgage loan or otherwise delay the foreclosure process.

Impact of Real Estate and Mortgage Loan Markets on Non-Agency RMBS. In addition to the foregoing considerations, the market for defaulted residential mortgage loans and

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

foreclosed real estate properties may be very limited. In particular, the economic conditions that lead to a higher rate of delinquencies and defaults on a portfolio of real estate mortgage loans may also lead to a reduction in the value of the related real estate properties, which in turn will result in greater losses upon a foreclosure of the real estate properties. At any one time, a portfolio of non-agency RMBS may be backed by residential mortgage loans that are highly concentrated in only a few states or regions. As a result, the performance of such residential mortgage loans may be more susceptible to a downturn in the economy, including in particular industries that are highly represented in such states or regions, natural calamities and other adverse conditions affecting such areas. In addition, the residential mortgage loans underlying non-agency RMBS may include so-called “jumbo” residential mortgage loans, having original principal balances that are significantly higher than is generally the case for residential mortgage loans. If the portfolio of residential mortgage loans underlying a non-agency RMBS includes a high concentration of “jumbo” residential mortgage loans, the performance of the non-agency RMBS will be more susceptible to the performance of individual borrowers and adverse economic conditions in general than would otherwise be the case.

Another factor that may contribute to, and may in the future result in, higher delinquency and default rates is the increase in monthly payments on adjustable-rate mortgage loans. Any increase in prevailing market interest rates may result in increased payments for borrowers who have adjustable-rate mortgage loans. Moreover, with respect to hybrid mortgage loans after their initial fixed-rate period or other so-called adjustable-rate mortgage loans, interest-only products or products having a lower rate, and with respect to mortgage loans with a negative amortization feature which reach their negative amortization cap, borrowers may experience a substantial increase in their monthly payment even without an increase in prevailing market interest rates. Increases in payments for borrowers may result in increased rates of delinquencies and defaults on residential mortgage loans underlying the non-agency RMBS. The past performance of the market for non-agency RMBS is not a reliable indicator of future performance because of the unprecedented and unpredictable performance of the residential mortgage loan market.

As a result of rising concerns about increases in delinquencies and defaults on residential mortgage loans (particularly on subprime and adjustable-rate mortgage loans) and as a result of increasing concerns about the financial strength of originators and servicers and their ability to perform their obligations with respect to non-agency RMBS, there may be an adverse change in the market sentiments of investors about the market values and volatility and the degree of risk of non-agency RMBS generally. Some or all of the underlying residential mortgage loans in an issue of non-agency RMBS may have balloon payments due on their respective maturity dates. Balloon residential mortgage loans involve a greater risk to a lender than fully amortizing loans, because the ability of a borrower to pay such amount will normally depend on its ability to obtain refinancing of the related mortgage

Western Asset Mortgage Opportunity Fund Inc.

loan or sell the related mortgaged property at a price sufficient to permit the borrower to make the balloon payment, which will depend on a number of factors prevailing at the time such refinancing or sale is required, including, without limitation, the strength of the local or national residential real estate markets, interest rates and general economic conditions and the financial condition of the borrower. If borrowers are unable to make such balloon payments, the related issue of non-agency RMBS may experience losses.

Prepayment Risk Associated with Non-Agency RMBS. Non-agency RMBS are susceptible to prepayment risks. Except in the case of certain types of non-agency RMBS, the mortgage loans underlying non-agency RMBS generally do not contain prepayment penalties and a reduction in market interest rates will increase the likelihood of prepayments on the related non-agency RMBS, resulting in a reduction in yield to maturity for most holders of such securities. In the case of certain home equity loan securities and certain types of non-agency RMBS, even though the underlying mortgage loans often contain prepayment premiums, such prepayment premiums may not be sufficient to discourage borrowers from prepaying their mortgage loans in the event of a reduction in market interest rates, resulting in a reduction in the yield to maturity for holders of the related non-agency RMBS. In addition to reductions in the level of market interest rates and the prepayment provisions of the mortgage loans, repayments on the residential mortgage loans underlying an issue of non-agency RMBS may also be affected by a variety of economic, geographic and other factors, including the size difference between the interest rates on the underlying residential mortgage loans (giving consideration to the cost of refinancing) and prevailing mortgage rates and the availability of refinancing. In general, if prevailing interest rates fall significantly below the interest rates on the related residential mortgage loans, the rate of prepayment on the underlying residential mortgage loans would be expected to increase. Conversely, if prevailing interest rates rise to a level significantly above the interest rates on the related mortgage loans, the rate of prepayment would be expected to decrease. Prepayments could reduce the yield received on the related issue of non-agency RMBS.

Non-agency RMBS typically contain provisions that require repurchase of mortgage loans by the originator or other seller in the event of a breach of a representation or warranty regarding loan quality and characteristics of such loan. Any repurchase of a mortgage loan as a result of a breach has the same effect on the yield received on the related issue of non-agency RMBS as a prepayment of such mortgage loan. Any increase in breaches of representations and the consequent repurchases of mortgage loans that result from inadequate underwriting procedures and policies and protections against fraud will have the same effect on the yield on the related non-agency RMBS as an increase in prepayment rates. CMBS are also subject to prepayment risk, as described above. Risk of prepayment may be reduced for commercial real estate property loans containing significant prepayment penalties or prohibitions on principal payments for a period of time following origination.

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

The Fund may also invest in MBS which are IO securities and PO securities. An IO security receives some or all of the interest portion of the underlying collateral and little or no principal. A reference principal value called a notional value is used to calculate the amount of interest due. IO securities are sold at a deep discount to their notional principal amount. A PO security does not receive any interest, is priced at a deep discount to its redemption value and ultimately receives the redemption value. Generally speaking, when interest rates are falling and prepayment rates are increasing, the value of a PO security will rise and the value of an IO security will fall. Conversely, when interest rates are rising and prepayment rates are decreasing, generally the value of a PO security will fall and the value of an IO security will rise.

Legal Risks Associated with Non-Agency RMBS. Legal risks can arise as a result of the procedures followed in connection with the origination of the mortgage loans or the servicing thereof which may be subject to various federal and state laws (including, without limitation, predatory lending laws), public policies and principles of equity regulating interest rates and other charges, require certain disclosures, require licensing of originators, prohibit discriminatory lending practices, regulate the use of consumer credit information and debt collection practices and may limit the servicer’s ability to collect all or part of the principal of or interest on a residential mortgage loan, entitle the borrower to a refund of amounts previously paid by it or subject the servicer to damages and sanctions. Specifically, provisions of federal predatory lending laws, such as the federal Truth-in-Lending Act (as supplemented by the Home Ownership and Equity Protection Act of 1994) and Regulation Z, and various enacted state predatory lending laws provide that a purchaser or assignee of specified types of residential mortgage loans (including an issuer of non-agency RMBS) may be held liable for violations by the originator of such mortgage loans. Under such assignee liability provisions, a borrower is generally given the right to assert against a purchaser of its mortgage loan any affirmative claims and defenses to payment such borrower could assert against the originator of the loan or, where applicable, the home improvement contractor that arranged the loan. Liability under such assignee liability provisions could, therefore, result in a disruption of cash flows allocated to the holders of non-agency RMBS where either the issuer of such non-agency RMBS is liable in damages or is unable to enforce payment by the borrower. In most but not all cases, the amount recoverable against a purchaser or assignee under such assignee liability provisions is limited to amounts previously paid and still owed by the borrower. Moreover, sellers of residential mortgage loans to an issuer of non-agency RMBS typically represent that the loans have been originated in accordance with all applicable laws and in the event such representation is breached, the seller typically must repurchase the offending loan.

Notwithstanding these protections, an issuer of non-agency RMBS may be exposed to an unquantifiable amount of potential assignee liability because, first, the amount of potential assignee liability under certain predatory lending laws is unclear and has yet to be litigated,

Western Asset Mortgage Opportunity Fund Inc.

and, second, in the event a predatory lending law does not prohibit class action lawsuits, it is possible that an issuer of non-agency RMBS could be liable in damages for more than the original principal amount of the offending loans held by it. In such circumstances the issuer of non-agency RMBS may be forced to seek contribution from other parties, who may no longer exist or have adequate funds available to fund such contribution.

In addition, structural and legal risks of non-agency RMBS include the possibility that, in a bankruptcy or similar proceeding involving the originator or the servicer (often the same entity or affiliates), the assets of the issuer could be treated as never having been truly sold by the originator to the issuer and could be substantively consolidated with those of the originator, or the transfer of such assets to the issuer could be voided as a fraudulent transfer. Challenges based on such doctrines could result also in cash flow delays and losses on the related issue of non-agency RMBS.

In some cases, servicers of non-agency RMBS have been the subject of legal proceedings involving the origination and/or servicing practices of such servicers. Large groups of private litigants and states attorneys general have brought such proceedings. Because of the large volume of mortgage loans originated and serviced by such servicers, such litigation can cause heightened financial strain on servicers. In other cases, origination and servicing practices may cause or contribute to such strain, because of representation and warranty repurchase liability arising in MBS and mortgage loan sale transactions. Any such financial strain could cause servicers to service below required standards, causing delinquencies and losses in any related MBS transaction to rise, and in extreme cases could cause the servicer to seek the protection of any applicable bankruptcy or insolvency law. In any such proceeding, it is unclear whether the fees that the servicer charges in such transactions would be sufficient to permit that servicer or a successor servicer to service the mortgage loans in such transaction adequately. If such fees had to be increased, it is likely that the most subordinated security holders in such transactions would be effectively required to pay such increased fees. Finally, these entities may be the subject of future laws designed to protect consumers from defaulting on their mortgage loans. Such laws may have an adverse effect on the cash flows paid under such non-agency RMBS.

In the past year, a number of lenders specializing in residential mortgages have sought bankruptcy protection, shut down or been refused further financings from their lenders. In addition, certain lenders who service and/or issue non-agency RMBS have announced that they are being investigated by or have received information requests from U.S. federal and/or state authorities, including the Securities and Exchange Commission. As a result of such investigations and other similar investigations and general concerns about the adequacy or accuracy of disclosure of risks to borrowers and their understanding of such risks, U.S. financial regulators have indicated that they may propose new guidelines for the mortgage industry. Guidelines, if introduced, together with the other factors described

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

herein, may make it more difficult for borrowers with weaker credit to refinance, which may lead to further increases in delinquencies, extensions in duration and losses in mortgage-related assets. Furthermore, because some mortgage loans have high recoveries, and as property values decline, increasing loan-to-value ratios, recoveries on some defaulted mortgage loans are more likely to be less than the amounts owed under such mortgage loans, resulting in higher net losses than would have been the case had property values remained the same or increased.

CMBS Risk. CMBS are, generally, securities backed by obligations (including certificates of participation in obligations) that are principally secured by mortgages on real property or interests therein having a multifamily or commercial use, such as regional malls, other retail space, office buildings, industrial or warehouse properties, hotels, nursing homes and senior living centers. The market for CMBS developed more recently and, in terms of total outstanding principal amount of issues, is relatively small compared to the market for residential single-family mortgage-related securities. CMBS are subject to particular risks, including lack of standardized terms, shorter maturities than residential mortgage loans and payment of all or substantially all of the principal only at maturity rather than regular amortization of principal. Additional risks may be presented by the type and use of a particular commercial property. Special risks are presented by hospitals, nursing homes, hospitality properties and certain other property types. Commercial property values and net operating income are subject to volatility, which may result in net operating income becoming insufficient to cover debt service on the related mortgage loan. The repayment of loans secured by income-producing properties is typically dependent upon the successful operation of the related real estate project rather than upon the liquidation value of the underlying real estate. Furthermore, the net operating income from and value of any commercial property is subject to various risks, including changes in general or local economic conditions and/or specific industry segments; the solvency of the related tenants; declines in real estate values; declines in rental or occupancy rates; increases in interest rates, real estate tax rates and other operating expenses; changes in governmental rules, regulations and fiscal policies; acts of God; terrorist threats and attacks and social unrest and civil disturbances. Consequently, adverse changes in economic conditions and circumstances are more likely to have an adverse impact on mortgage-related securities secured by loans on commercial properties than on those secured by loans on residential properties. In addition, commercial lending generally is viewed as exposing the lender to a greater risk of loss than one- to four- family residential lending. Commercial lending, for example, typically involves larger loans to single borrowers or groups of related borrowers than residential one- to four- family mortgage loans. In addition, the repayment of loans secured by income producing properties typically is dependent upon the successful operation of the related real estate project and the cash flow generated therefrom.

Western Asset Mortgage Opportunity Fund Inc.

The exercise of remedies and successful realization of liquidation proceeds relating to CMBS is also highly dependent on the performance of the servicer or special servicer. In many cases, overall control over the special servicing of related underlying mortgage loans will be held by a “directing certificateholder” or a “controlling class representative,” which is appointed by the holders of the most subordinate class of CMBS in such series. The Fund may not have the right to appoint the directing certificateholder. In connection with the servicing of the specially serviced mortgage loans, the related special servicer may, at the direction of the directing certificateholder, take actions with respect to the specially serviced mortgage loans that could adversely affect the Fund’s interests. There may be a limited number of special servicers available, particularly those that do not have conflicts of interest.

Western Asset will value the Fund’s potential CMBS investments based on loss-adjusted yields, taking into account estimated future losses on the mortgage loans included in the securitization’s pool of loans, and the estimated impact of these losses on expected future cash flows. Western Asset’s loss estimates may not prove accurate, as actual results may vary from estimates. In the event that Western Asset overestimates the pool level losses relative to the price the Fund pays for a particular CMBS investment, the Fund may experience losses with respect to such investment.

Interest Rate Risk Associated with Non-Agency RMBS and CMBS. The rate of interest payable on certain non-agency RMBS and CMBS may be set or effectively capped at the weighted average net coupon of the underlying mortgage loans themselves, often referred to as an “available funds cap.” As a result of this cap, the return to the holder of such non-agency RMBS and CMBS is dependent on the relative timing and rate of delinquencies and prepayments of mortgage loans bearing a higher rate of interest. In general, early prepayments will have a greater negative impact on the yield to the holder of such non-agency RMBS and CMBS.

The value of fixed rate debt securities can be expected to vary inversely with changes in prevailing interest rates. Fixed rate debt securities with longer maturities, which tend to produce higher yields, are subject to potentially greater capital appreciation and depreciation than securities with shorter maturities.

Structural Risks Associated with Non-Agency RMBS and CMBS. Because non-agency RMBS generally are ownership or participation interests in pools of mortgage loans secured by a pool of one- to four-family residential properties underlying the mortgage loan pool, the non-agency RMBS are entitled to payments provided for in the underlying agreement only when and if funds are generated by the underlying mortgage loan pool. This likelihood of the return of interest and principal may be assessed as a credit matter. However, the holders of non-agency RMBS do not have the legal status of secured creditors, and cannot accelerate a claim for payment on their securities, or force a sale of the mortgage loan pool

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

in the event that insufficient funds exist to pay such amounts on any date designated for such payment. The holders of non-agency RMBS do not typically have any right to remove a servicer solely as a result of a failure of the mortgage pool to perform as expected. A similar risk is associated with CMBS.

Subordination Risk Associated with Non-Agency RMBS and CMBS. The non-agency RMBS and CMBS may be subordinated to one or more other senior classes of securities of the same series for purposes of, among other things, offsetting losses and other shortfalls with respect to the related underlying mortgage loans. For example, in the case of certain non-agency RMBS and CMBS, no distributions of principal will generally be made with respect to any class until the aggregate principal balances of the corresponding senior classes of securities have been reduced to zero. As a result, non-agency RMBS and CMBS may be more sensitive to risk of loss, writedowns, the non-fulfillment of repurchase obligations, overadvancing on a pool of loans and the costs of transferring servicing than senior classes of securities.

Credit Risk and Counterparty Risk. If an issuer or guarantor of a security held by the Fund or a counterparty to a financial contract with the Fund defaults or its credit is downgraded, or is perceived to be less creditworthy, or if the value of the assets underlying a security declines, the value of your investment will typically decline. Changes in actual or perceived creditworthiness may occur quickly. The Fund could be delayed or hindered in its enforcement of rights against an issuer, guarantor or counterparty. Subordinated securities are more likely to suffer a credit loss than non-subordinated securities of the same issuer and will be disproportionately affected by a default, downgrade or perceived decline in creditworthiness.

Interest Rate Risk. The market price of the Fund’s investments will change in response to changes in interest rates and other factors. During periods of declining interest rates, the market price of fixed income securities generally rises. Conversely, during periods of rising interest rates, the market price of such securities generally declines. The magnitude of these fluctuations in the market price of fixed income securities is generally greater for securities with longer maturities. Additionally, such risk may be greater during the current period of historically low interest rates. Fluctuations in the market price of the Fund’s securities will not affect interest income derived from securities already owned by the Fund, but will be reflected in the Fund’s net asset value. The Fund may utilize certain strategies, including investments in structured notes or interest rate swap or cap transactions, for the purpose of reducing the interest rate sensitivity of the portfolio and decreasing the Fund’s exposure to interest rate risk, although there is no assurance that it will do so or that such strategies will be successful.

Leverage Risk. The Fund is authorized to use leverage. The value of your investment may be more volatile if the fund borrows or uses instruments, such as derivatives, that have a

Western Asset Mortgage Opportunity Fund Inc.

leveraging effect on the fund’s portfolio. Other risks described in the Prospectus also will be compounded because leverage generally magnifies the effect of a change in the value of an asset and creates a risk of loss of value on a larger pool of assets than the fund would otherwise have had. The fund may also have to sell assets at inopportune times to satisfy its obligations created by the use of leverage or derivatives. The use of leverage is considered to be a speculative investment practice and may result in the loss of a substantial amount, and possibly all, of the fund’s assets. In addition, the fund’s portfolio will be leveraged if it exercises its right to delay payment on a redemption, and losses will result if the value of the fund’s assets declines between the time a redemption request is deemed to be received by the fund and the time the fund liquidates assets to meet redemption requests.

ABS Risk. The Fund may invest up to 20% of its Managed Assets in non-mortgage related ABS. Investing in ABS entails various risks, including credit risks, liquidity risks, interest rate risks, market risks and legal risks. Credit risk is an important issue in ABS because of the significant credit risks inherent in the underlying collateral and because issuers are primarily private entities. The structure of an ABS and the terms of the investors’ interest in the collateral can vary widely depending on the type of collateral, the desires of investors and the use of credit enhancements. Although the basic elements of all ABS are similar, individual transactions can differ markedly in both structure and execution. Important determinants of the risk associated with issuing or holding the securities include the process by which principal and interest payments are allocated and distributed to investors, how credit losses affect the issuing vehicle and the return to investors in such ABS, whether collateral represents a fixed set of specific assets or accounts, whether the underlying collateral assets are revolving or closed-end, under what terms (including the maturity of the ABS itself) any remaining balance in the accounts may revert to the issuing entity and the extent to which the entity that is the actual source of the collateral assets is obligated to provide support to the issuing vehicle or to the investors in such ABS. The Fund may invest in ABS that are subordinate in right of payment and rank junior to other securities that are secured by or represent an ownership interest in the same pool of assets. In addition, many of the transactions in which such securities are issued have structural features that divert payments of interest and/or principal to more senior classes when the delinquency or loss experience of the pool exceeds certain levels. As a result, such securities have a higher risk of loss as a result of delinquencies or losses on the underlying assets.

Below Investment Grade (“High Yield” or “Junk”) Securities Risk. A significant portion of the Fund’s portfolio may consist of below investment grade securities (high yield securities). The Fund invests a substantial portion of its assets in MBS that were originally rated AAA, but subsequently have been downgraded to below investment grade. High yield debt securities are generally subject to greater credit risks than higher-grade debt securities,

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

including the risk of default on the payment of interest or principal. High yield debt securities are considered speculative, typically have lower liquidity and are more difficult to value than higher grade bonds. High yield debt securities tend to be volatile and more susceptible to adverse events, credit downgrades and negative sentiments and may be difficult to sell at a desired price, or at all, during periods of uncertainty or market turmoil.

Distressed Investments. The Fund invests in distressed securities, which are securities and obligations of companies that are experiencing financial or business difficulties. Distressed investments may result in significant returns to the Fund, but also involve a substantial degree of risk. Among the risks inherent in distressed situations is the fact that it frequently may be difficult to obtain information as to the true condition of the securities being purchased. The market prices of distressed securities are also subject to abrupt and erratic market movements and above average price volatility, and the spread between the bid and asked prices of such securities may be greater than normally experienced.

The Fund intends to invest in distressed investments including non-performing and sub-performing RMBS and CMBS, many of which are not publicly traded and which may involve a substantial degree of risk. In certain periods, there may be little or no liquidity in the markets for these securities or instruments. In addition, the prices of such securities or instruments may be subject to periods of abrupt and erratic market movements and above-average price volatility. It may be more difficult to value such securities and the spread between the bid and asked prices of such securities may be greater than normally expected. If the Western Asset’s evaluation of the risks and anticipated outcome of an investment in a distressed security should prove incorrect, the Fund may lose a substantial portion or all of its investment.

Furthermore, investments in assets operating in workout modes or under Chapter 11 of the United States Bankruptcy Code, as amended, and other comparable bankruptcy laws may, in certain circumstances, be subject to certain additional potential liabilities that may exceed the value of the Fund’s original investment. For example, under certain circumstances, lenders who have inappropriately exercised control of the management and policies of a debtor may have their claims subordinated or disallowed or counterclaims may be filed and lenders may be found liable for damages suffered by various parties as a result of such actions. In addition, under certain circumstances, payments to the Fund and distributions by the Fund to its investors may be reclaimed if any such payment or distribution is later determined to have been a fraudulent conveyance or a preferential payment.

The Fund is not limited in its ability to invest in distressed investments.

Credit Risk Associated with Originators and Servicers of Residential and Commercial Mortgage Loans. A number of originators and servicers of residential and commercial mortgage loans, including some of the largest originators and servicers in the residential

Western Asset Mortgage Opportunity Fund Inc.

and commercial mortgage loan market, have experienced serious financial difficulties, including some that are now subject to federal insolvency proceedings. These difficulties have resulted from many factors, including increased competition among originators for borrowers, decreased originations by such originators of mortgage loans and increased delinquencies and defaults on such mortgage loans, as well as from increases in claims for repurchases of mortgage loans previously sold by them under agreements that require repurchase in the event of breaches of representations regarding loan quality and characteristics. Such difficulties may affect the performance of non-agency RMBS and CMBS backed by mortgage loans. Furthermore, the inability of the originator to repurchase such mortgage loans in the event of loan representation breaches or the servicer to repurchase such mortgage loans upon a breach of its servicing obligations also may affect the performance of related non-agency RMBS and CMBS. Delinquencies and losses on, and, in some cases, claims for repurchase by the originator of, mortgage loans originated by some mortgage lenders have increased as a result of inadequate underwriting procedures and policies, including inadequate due diligence, failure to comply with predatory and other lending laws and, particularly in the case of any “no documentation” or “limited documentation” mortgage loans that may support non-agency RMBS, inadequate verification of income and employment history. Delinquencies and losses on, and claims for repurchase of, mortgage loans originated by some mortgage lenders have also resulted from fraudulent activities of borrowers, lenders, appraisers, and other residential mortgage industry participants such as mortgage brokers, including misstatements of income and employment history, identity theft and overstatements of the appraised value of mortgaged properties. Many of these originators and servicers are very highly leveraged. These difficulties may also increase the chances that these entities may default on their warehousing or other credit lines or become insolvent or bankrupt and thereby increase the likelihood that repurchase obligations will not be fulfilled and the potential for loss to holders of non-agency RMBS, CMBS and subordinated security holders.

The servicers of non-agency RMBS and CMBS are often the same entities as, or affiliates of, the originators of these mortgage loans. Accordingly, the financial risks relating to originators of non-agency RMBS and CMBS described immediately above also may affect the servicing of non-agency RMBS and CMBS. In the case of such servicers, and other servicers, financial difficulties may have a negative effect on the ability of servicers to pursue collection on mortgage loans that are experiencing increased delinquencies and defaults and to maximize recoveries on sale of underlying properties following foreclosure.

Non-agency RMBS and CMBS typically provide that the servicer is required to make advances in respect of delinquent mortgage loans. However, servicers experiencing financial difficulties may not be able to perform these obligations or obligations that they may have to other parties of transactions involving these securities. Like originators, these entities are typically very highly leveraged. Such difficulties may cause servicers to default

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

under their financing arrangements. In certain cases, such entities may be forced to seek bankruptcy protection. Due to the application of the provisions of bankruptcy law, servicers who have sought bankruptcy protection may not be required to advance such amounts. Even if a servicer were able to advance amounts in respect of delinquent mortgage loans, its obligation to make such advances may be limited to the extent that it does not expect to recover such advances due to the deteriorating credit of the delinquent mortgage loans or declining value of the related mortgaged properties. Moreover, servicers may overadvance against a particular mortgage loan or charge too many costs of resolution or foreclosure of a mortgage loan to a securitization, which could increase the potential losses to holders of non-agency RMBS and CMBS. In such transactions, a servicer’s obligation to make such advances may also be limited to the amount of its servicing fee. In addition, if an issue of non-agency RMBS and CMBS provides for interest on advances made by the servicer, in the event that foreclosure proceeds or payments by borrowers are not sufficient to cover such interest, such interest will be paid to the servicer from available collections or other mortgage income, thereby reducing distributions made on the non-agency RMBS and CMBS and, in the case of senior-subordinated non-agency RMBS and CMBS described below, first from distributions that would otherwise be made on the most subordinated non-agency RMBS and CMBS of such issue. Any such financial difficulties may increase the possibility of a servicer termination and the need for a transfer of servicing and any such liabilities or inability to assess such liabilities may increase the difficulties and costs in affecting such transfer and the potential loss, through the allocation of such increased cost of such transfer, to subordinated security holders.

There can be no assurance that originators and servicers of mortgage loans will not continue to experience serious financial difficulties or experience such difficulties in the future, including becoming subject to bankruptcy or insolvency proceedings, or that underwriting procedures and policies and protections against fraud will be sufficient in the future to prevent such financial difficulties or significant levels of default or delinquency on mortgage loans. Because the recent financial difficulties experienced by such originators and services is unprecedented and unpredictable, the past performance of the residential and commercial mortgage loans originated and serviced by them (and the corresponding performance of the related non-agency RMBS and CMBS) is not a reliable indicator of the future performance of such residential mortgage loans (or the related non-agency RMBS and CMBS).

Subprime Mortgage Market Risk. The residential mortgage market in the United States has experienced difficulties that may adversely affect the performance and market value of certain mortgages and mortgage-related securities. Delinquencies and losses on residential mortgage loans (especially subprime and second-line mortgage loans) generally have increased and may continue to increase, and a decline in or flattening of housing values (as has been experienced and may continue to be experienced in many housing markets) may

Western Asset Mortgage Opportunity Fund Inc.

exacerbate such delinquencies and losses. Borrowers with adjustable rate mortgage loans are more sensitive to changes in interest rates, which affect their monthly mortgage payments, and may be unable to secure replacement mortgages at comparably low interest rates. Also, a number of residential mortgage loan originators have experienced serious financial difficulties or bankruptcy. Largely due to the foregoing, reduced investor demand for mortgage loans and mortgage-related securities and increased investor yield requirements have caused limited liquidity in the secondary market for mortgage-related securities, which can adversely affect the market value of mortgage-related securities. It is possible that such limited liquidity in such secondary markets could continue or worsen.

The Fund may acquire non-agency RMBS backed by collateral pools of mortgage loans that have been originated using underwriting standards that are less restrictive than those used in underwriting “prime mortgage loans” and “Alt-A mortgage loans.” These lower standards include mortgage loans made to borrowers having imperfect or impaired credit histories, mortgage loans where the amount of the loan at origination is 80% or more of the value of the mortgage property, mortgage loans made to borrowers with low credit scores, mortgage loans made to borrowers who have other debt that represents a large portion of their income and mortgage loans made to borrowers whose income is not required to be disclosed or verified. Due to economic conditions, including increased interest rates and lower home prices, as well as aggressive lending practices, subprime mortgage loans have in recent periods experienced increased rates of delinquency, foreclosure, bankruptcy and loss, and they are likely to continue to experience delinquency, foreclosure, bankruptcy and loss rates that are higher, and that may be substantially higher, than those experienced by mortgage loans underwritten in a more traditional manner. Thus, because of the higher delinquency rates and losses associated with subprime mortgage loans, the performance of non-agency RMBS backed by subprime mortgage loans that the Fund may acquire could be correspondingly adversely affected, which could adversely impact the Fund’s results of operations, financial condition and business.

If the economy of the United States further deteriorates, the incidence of mortgage foreclosures, especially subprime mortgages, may continue to increase, which may adversely affect the value of any MBS owned by the Fund. The U.S. Congress and various government regulatory authorities have discussed the possibility of restructuring mortgages and imposing forbearance requirements on defaulted mortgages. Neither FTFA nor Western Asset can predict the form any such modifications, forbearance or related regulations might take, and these regulations may adversely affect the value of MBS owned by the Fund.

Risks Relating to Investments in Mortgage Whole Loans.

Credit Risk Associated With Investments in Mortgage Whole Loans. The holder of residential and commercial mortgages assumes the risk that the related borrowers may default on their obligations to make full and timely payments of principal and interest. In

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

general, these investments carry greater investment risk than agency MBS/CMBS because the former are not guaranteed as to principal or interest by the U.S. Government, any federal agency or any federally chartered corporation. As a result, a mortgage whole loan is directly exposed to losses resulting from default and foreclosure. Therefore, the value of the underlying property, the creditworthiness and financial position of the borrower, and the priority and enforceability of the lien are each of great importance. Whether or not Franklin Templeton, Western Asset or their affiliates have participated in the negotiation of the terms of any such mortgages, there can be no assurance as to the adequacy of the protection of the terms of the loan, including the validity or enforceability of the loan and the maintenance of the anticipated priority and perfection of the applicable security interests. Furthermore, claims may be asserted that might interfere with enforcement of the rights of the Fund. In the event of a foreclosure, the Fund may assume direct ownership of the underlying real estate. The liquidation proceeds upon sale of such real estate may not be sufficient to recover the Fund’s cost basis in the loan, resulting in a loss to the Fund. Any costs or delays involved in the effectuation of a foreclosure of the loan or a liquidation of the underlying property will further reduce the proceeds and thus increase the loss.

Higher-than-expected rates of default and/or higher-than-expected loss severities on these investments could adversely affect the value of these assets. Accordingly, defaults in the payment of principal and/or interest on the Fund’s residential and commercial whole loans would likely result in the Fund incurring losses of income from, and/or losses in market value relating to, these assets, which could materially adversely affect the Fund’s results of operations.

Holders of residential and commercial whole loans are subject to the risk that the related borrowers may default or have defaulted on their obligations to make full and timely payments of principal and interest. A number of factors impact a borrower’s ability to repay including, among other things, changes in employment status, changes in interest rates or the availability of credit, and changes in real estate values. In addition to the credit risk associated with these assets, residential and commercial whole loans are less liquid than certain of the Fund’s other credit sensitive assets, which may make them more difficult to dispose of if the need or desire arises. If actual results are different from the Fund’s assumptions in determining the prices paid to acquire such loans, particularly if the market value of the underlying properties decreases significantly subsequent to purchase, we may incur significant losses, which could materially adversely affect the Fund’s results.

Servicing-Related Risks of Mortgage Whole Loans. We rely on third-party servicers to service and manage the mortgages underlying the Fund’s loan portfolio. The ultimate returns generated by these investments may depend on the quality of the servicer. If a servicer is not vigilant in seeing that borrowers make their required monthly payments, borrowers may be less likely to make these payments, resulting in a higher frequency of

Western Asset Mortgage Opportunity Fund Inc.

default. If a servicer takes longer to liquidate non-performing mortgages, the Fund’s losses related to those loans may be higher than originally anticipated. Any failure by servicers to service these mortgages and/or to competently manage and dispose of REO properties could negatively impact the value of these investments and the Fund’s financial performance. In addition, while we have contracted with third-party servicers to carry out the actual servicing of the loans (including all direct interface with the borrowers), for loans that we purchase together with the related servicing rights, we are nevertheless ultimately responsible, vis-à-vis the borrowers and state and federal regulators, for ensuring that the loans are serviced in accordance with the terms of the related notes and mortgages and applicable law and regulation. In light of the current regulatory environment, such exposure could be significant even though we might have contractual claims against the Fund’s servicers for any failure to service the loans to the required standard.

The foreclosure process, especially in judicial foreclosure states such as New York, Florida and New Jersey, can be lengthy and expensive, and the delays and costs involved in completing a foreclosure, and then subsequently liquidating the REO property through sale, may materially increase any related loss. In addition, at such time as title is taken to a foreclosed property, it may require more extensive rehabilitation than we estimated at acquisition. Thus, a material amount of foreclosed residential mortgage loans, particularly in the states mentioned above, could result in significant losses in the Fund’s residential and commercial whole loan portfolio and could materially adversely affect the Fund’s results of operations.

Prepayment Risk Associated With Investments in Mortgage Whole Loans. The residential and commercial whole loans we acquire are backed by pools of residential and commercial mortgage loans. We receive payments, generally, from the payments that are made on these underlying residential and commercial mortgage loans. While commercial mortgages frequently include limitations on the ability of the borrower to prepay, Residential and Commercial mortgages generally do not. When borrowers prepay their residential and commercial mortgage loans at rates that are faster than expected, the net result is prepayments that are faster than expected on the residential and commercial whole loans. These faster than expected payments may adversely affect the Fund’s profitability.

We may purchase residential and commercial whole loans that have a higher interest rate than the then prevailing market interest rate. In exchange for this higher interest rate, we may pay a premium to par value to acquire the asset. In accordance with accounting rules, we amortize this premium over the expected term of the asset based on the Fund’s prepayment assumptions. If the asset is prepaid in whole or in part at a faster than expected rate, however, we must expense all or a part of the remaining unamortized portion of the premium that was paid at the time of the purchase, which will adversely affect the Fund’s profitability.

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

Prepayment rates generally increase when interest rates fall and decrease when interest rates rise, but changes in prepayment rates are difficult to predict. House price appreciation, while increasing the value of the collateral underlying the Fund’s residential and commercial whole loans, may increase prepayment rates as borrowers may be able to refinance at more favorable terms. Prepayments can also occur when borrowers default on their residential and commercial mortgages and the mortgages are prepaid from the proceeds of a foreclosure sale of the property (an involuntary prepayment), or when borrowers sell the property and use the sale proceeds to prepay the mortgage as part of a physical relocation. Prepayment rates also may be affected by conditions in the housing and financial markets, increasing defaults on Residential and Commercial mortgage loans, which could lead to an acceleration of the payment of the related principal, general economic conditions and the relative interest rates on fixed-rate mortgages and ARMs. While we seek to manage prepayment risk, in selecting residential and commercial whole loans investments we must balance prepayment risk against other risks, the potential returns of each investment and the cost of hedging the Fund’s risks. No strategy can completely insulate us from prepayment or other such risks, and we may deliberately retain exposure to prepayment or other risks.

In addition, a decrease in prepayment rates may adversely affect the Fund’s profitability. When borrowers prepay their residential and commercial mortgage loans at slower than expected rates, prepayments on the residential and commercial whole loans may be slower than expected. These slower than expected payments may adversely affect the Fund’s profitability. We may purchase residential and commercial whole loans that have a lower interest rate than the then prevailing market interest rate. In exchange for this lower interest rate, we may pay a discount to par value to acquire the asset. In accordance with accounting rules, we accrete this discount over the expected term of the asset based on the Fund’s prepayment assumptions. If the asset is prepaid at a slower than expected rate, however, we must accrete the remaining portion of the discount at a slower than expected rate. This will extend the expected life of the asset and result in a lower than expected yield on assets purchased at a discount to par.

Geographic Focus Risk Associated With Residential and Commercial Whole Loans. The Fund’s performance depends on the economic conditions in markets in which the properties securing the mortgage loans underlying the Fund’s investments are concentrated. A substantial portion of the Fund’s portfolio securities may have underlying properties concentrated in specific geographies, including California. The Fund’s financial condition, results of operations, the market price of the Fund’s common stock and the Fund’s ability to make distributions to the Fund’s stockholders could be materially and adversely affected by this geographic focus if market conditions, such as an oversupply of space or a reduction in demand for real estate in an area, deteriorate in California. Moreover, due to the geographic concentration of properties securing the mortgages underlying the Fund’s investments, the

Western Asset Mortgage Opportunity Fund Inc.

Fund may be disproportionately affected by general risks such as natural disasters, including major wildfires, floods and earthquakes, severe or inclement weather, and acts of terrorism should such developments occur in or near the markets in California in which such properties are located.

Other Risks Associated with Mortgage Whole Loans. Mortgage whole loans have risks above and beyond those discussed above. For example, mortgage whole loans are subject to “special hazard” risk (property damage caused by hazards, such as earthquakes or environmental hazards, not covered by standard property insurance policies) and to bankruptcy risk (reduction in a borrower’s mortgage debt by a bankruptcy court). In addition, claims may be assessed against the Fund on account of its position as mortgage holder or property owner, including responsibility for tax payments, environmental hazards and other liabilities.

Tax Risks. To qualify for the favorable U.S. federal income tax treatment generally accorded to regulated investment companies, among other things, the Fund must derive in each taxable year at least 90% of its gross income from certain prescribed sources and satisfy certain distribution and asset diversification requirements. If for any taxable year the Fund does not qualify for treatment as a regulated investment company, all of its taxable income (including its net capital gain) would be subject to U.S. federal income tax (and possible state income tax) at regular corporate rates without any deduction for distributions to stockholders, and such distributions would be taxable as ordinary dividends to the extent of the Fund’s current and accumulated earnings and profits.

Risk of Taxable Income in Excess of Economic Income. The Fund expects to acquire debt instruments in the secondary market for less than their stated redemption price at maturity (or, in the case of debt instruments issued with original issue discount, their revised issue price). The discount at which such debt instruments are acquired may reflect doubts about their ultimate collectability rather than current market interest rates. The amount of such discount will nevertheless generally be treated as “market discount” for U.S. federal income tax purposes, subject to a de minimis exception. Market discount on a debt instrument accrues ratably on a daily basis, unless an election is made to accrue market discount on the basis of the constant yield to maturity of the debt instrument, based generally on the assumption that all future payments on the debt instrument will be made. The Fund has made an election to accrue market discount on a current basis, and accrued market discount for a debt instrument will generally have to be included in income each year as if the debt instrument were assured of ultimately being collected in full.

Similarly, many of the debt instruments (including MBS) that the Fund purchases will likely have been issued with original issue discount (“OID”), which discount might reflect doubt as to whether the entire principal amount of such debt instruments will ultimately prove to be collectible. The Fund will be required to report such OID based on a constant yield method

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

and income will be accrued and be currently taxable based on the assumption that all future projected payments due on such debt instruments will be made.

Finally, in the event that any debt instruments (including MBS) acquired by the Fund are delinquent as to mandatory principal and interest payments, or in the event payments with respect to a particular debt instrument are not made when due, the Fund may nonetheless be required to continue to recognize the unpaid interest as taxable income as it accrues, despite doubt as to its ultimate collectability. Similarly, the Fund may be required to accrue interest income with respect to subordinate MBS at the stated rate regardless of whether corresponding cash payments are received or are ultimately collectible.

Risks Associated with the Fund’s Ability To Satisfy Regulated Investment Company Distribution Requirements. The Fund generally must distribute annually at least 90% of its taxable income, excluding any net capital gain, in order to maintain its treatment as a regulated investment company for U.S. federal income tax purposes. To the extent that the Fund satisfies this distribution requirement, but distributes less than 100% of its taxable income and net capital gain, the Fund will be subject to U.S. federal corporate income tax on the Fund’s undistributed taxable income. In addition, the Fund will be subject to a 4% nondeductible excise tax if the actual amount that the Fund distributes to its stockholders in a calendar year is less than a minimum amount specified under U.S. federal income tax laws. The Fund intends to make distributions to its stockholders to comply with the requirements of the Code and to avoid paying U.S. federal income taxes and, if practicable, excise taxes, on undistributed taxable income. However, differences in timing between the recognition of taxable income and the actual receipt of cash could require the Fund to sell assets (including (i) cash, (ii) bank deposits, (iii) Treasury securities with maturities of not more than 90 calendar days, (iv) money market mutual funds that (a) are registered with the SEC and regulated under Rule 2a-7 promulgated under the 1940 Act and (b) invest exclusively in direct obligations of the United States or obligations the prompt payment of the principal of and interest on which is unconditionally guaranteed by the United States, (v) repurchase agreements secured by Treasury securities (if permitted by the Treasury) and (vi) any other investment approved by the Treasury in writing (collectively, “Temporary Investments”)) or borrow funds on a short-term or long-term basis or issue cash-stock dividends (described below) to meet the distribution requirements of the Code.

The Fund may find it difficult or impossible to meet distribution requirements in certain circumstances. Due to the nature of the assets in which the Fund intends to invest, the Fund’s taxable income may exceed the Fund’s net income as determined based on generally accepted accounting principles (“GAAP”) because, for example, realized capital losses will be deducted in determining the Fund’s GAAP net income but may not be deductible in computing the Fund’s taxable income required to be distributed. In addition, the Fund may invest in assets, including debt instruments requiring the Fund to accrue OID, that generate

Western Asset Mortgage Opportunity Fund Inc.

taxable income (referred to as “phantom income”) in excess of economic income or in advance of the corresponding cash flow from the assets. In addition, if the debt instruments provide for “payment-in-kind” or PIK interest, the Fund may recognize OID for federal income tax purposes. Moreover, the Fund may acquire distressed debt investments that are subsequently modified by agreement with the borrower. If the amendments to the outstanding debt are “significant modifications” under the applicable Treasury regulations, the modified debt may be considered to have been reissued to the Fund in a debt-for-debt exchange with the borrower. In that event, if the debt is considered to be “publicly traded” for federal income tax purposes, the modified debt in the hands of the Fund may be considered to have been issued with OID to the extent the fair-market value of the modified debt is less than the principal amount of the outstanding debt. Also, certain previously modified debt that the Fund acquires in the secondary market may be considered to have been issued with OID at the time it was modified. In general, the Fund will be required to accrue OID on a debt instrument as taxable income in accordance with applicable federal income tax rules even though no cash payments may be received on such debt instrument. In the event a borrower with respect to a particular debt instrument encounters financial difficulty rendering it unable to pay stated interest as due, the Fund may nonetheless be required to continue to recognize the unpaid interest as taxable income. Similarly, the Fund may be required to accrue interest income with respect to subordinate MBS at the stated rate regardless of when their corresponding cash payments are received. Further, the Fund may invest in assets that accrue market discount income, which may result in the recognition of taxable income in excess of the Fund’s economic gain in certain situations or the deferral of a portion of the Fund’s interest deduction paid on debt incurred to acquire or carry such assets.

Due to each of these potential timing differences between income recognition or expense deduction and cash receipts or disbursements, there is a significant risk that the Fund may have substantial taxable income in excess of cash available for distribution. To satisfy its distribution requirements, the Fund may borrow on unfavorable terms or distribute amounts that would otherwise be invested in future acquisitions, capital expenditures or repayment of debt. In addition, the Fund may make distributions of its Common Stock to satisfy the distribution requirements necessary to maintain the Fund’s treatment as a regulated investment company for U.S. federal income tax purposes and to avoid U.S. federal income and excise taxes, but no assurances can be given in this regard. Moreover, if the Fund’s only feasible alternative were to make a taxable distribution of the Fund’s Common Stock to comply with the regulated investment company distribution requirements for any taxable year and the value of the Fund’s Common Stock was not sufficient at such time to make a distribution to its holders of Common Stock in an amount at least equal to the minimum amount required to comply with such regulated investment company distribution

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

requirements, the Fund would generally fail to qualify for treatment as a regulated investment company for such taxable year.

Despite undertaking the efforts mentioned in the previous paragraph, the Fund may not be able to distribute the amounts necessary to satisfy the distribution requirements necessary to maintain its regulated investment company treatment for U.S. federal income tax purposes and to avoid U.S. federal income and excise taxes. If the Fund were unable to satisfy the 90% distribution requirement or otherwise were to fail to qualify as a regulated investment company in any year, material adverse tax consequences would result to investors. The Fund would be taxed in the same manner as an ordinary corporation and distributions to the Fund’s holders of Common Stock would not be deductible by the Fund in computing its taxable income. To qualify again to be taxed as a regulated investment company in a subsequent year, the Fund would be required to distribute to its holders of Common Stock its earnings and profits attributable to non-regulated investment company years reduced by an interest charge on 50% of such earnings and profits payable by the Fund to the Internal Revenue Service (“IRS”). In addition, if the Fund failed to qualify as a regulated investment company for a period greater than two taxable years, then the Fund would be required to elect to recognize and pay tax on any net built-in gain (the excess of aggregate gain, including items of income, over aggregate loss that would have been realized if the Fund had been liquidated) or, alternatively, be subject to taxation on such built-in gain recognized for a period of 5 years, in order to qualify as a regulated investment company in a subsequent year.

Government Intervention in Financial Markets Risk. United States federal and state governments and foreign governments, their regulatory agencies or self-regulatory organizations may take actions designed to support certain financial institutions and segments of the financial markets that have experienced extreme volatility, and in some cases a lack of liquidity, that affect the regulation of the securities in which the Fund invests, or the issuers of such securities, in ways that are unforeseeable issuers of corporate fixed income securities might seek protection under the bankruptcy laws. Legislation or regulation may also change the way in which the Fund itself is regulated. Such legislation or regulation could limit or preclude the Fund’s ability to achieve its investment objectives. Western Asset monitors developments and seeks to manage the Fund’s portfolio in a manner consistent with achieving the Fund’s investment objective, but there can be no assurance that it will be successful in doing so.

Currency Risk. The value of investments in securities denominated in foreign currencies increases or decreases as the rates of exchange between those currencies and the U.S. dollar change. Currency conversion costs and currency fluctuations could erase investment gains or add to investment losses. Currency exchange rates can be volatile, and are affected by factors such as general economic conditions, the actions of the U.S. and foreign

Western Asset Mortgage Opportunity Fund Inc.

governments or central banks, the imposition of currency controls and speculation. The Fund may be unable or may choose not to hedge its foreign currency exposure.

Extension Risk. Extension, or slower prepayments of the underlying mortgage loans, would extend the time it would take to receive cash flows and would generally compress the yield on non-agency RMBS and CMBS. Rising interest rates can cause the average maturity of the Fund to lengthen due to a drop in mortgage prepayments. This will increase both the sensitivity to rising interest rates and the potential for price declines of the Fund.

“Widening” Risk. The prices of non-agency RMBS or CMBS may decline substantially, for reasons that may not be attributable to any of the other risks described in this prospectus. In particular, purchasing assets at what may appear to be “undervalued” levels is no guarantee that these assets will not be trading at even more “undervalued” levels at a time of valuation or at the time of sale. It may not be possible to predict, or to protect against, such “spread widening” risk.

Management Risk. The Fund is subject to management risk because it is an actively managed investment portfolio. Western Asset and each individual portfolio manager will apply investment techniques and risk analyses in making investment decisions for the Fund, but there can be no guarantee that these will produce the desired results.

Credit Crisis Liquidity and Volatility Risk. The markets for credit instruments, including MBS, have experienced periods of extreme illiquidity and volatility. General market uncertainty and consequent repricing risk have led to market imbalances of sellers and buyers, which in turn have resulted in significant valuation uncertainties in a variety of MBS. These conditions resulted, and in many cases continue to result in, greater volatility, less liquidity, widening credit spreads and a lack of price transparency, with many MBS remaining illiquid and of uncertain value. These market conditions may make valuation of some of the Fund’s MBS uncertain and/or result in sudden and significant valuation increases or declines in its holdings. A significant decline in the value of the Fund’s portfolio would likely result in a significant decline in the value of your investment in Common Stock.

The debt and equity capital markets in the United States have been negatively impacted by significant write-offs in the financial services sector relating to subprime mortgages and the re-pricing of credit risk in the broadly syndicated market, among other things. These events, along with the deterioration of the housing market and the failure of major financial institutions, have led to worsening general economic conditions, which have materially and adversely impacted the broader financial and credit markets and have reduced the availability of debt and equity capital for the market as a whole and financial firms in particular. These developments may increase the volatility of the value of securities owned by the Fund and also may make it more difficult for the Fund to accurately value securities or to sell securities on a timely basis. These developments have adversely affected the

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

broader economy, and may continue to do so, which in turn may adversely affect the ability of issuers of securities owned by the Fund to make payments of principal and interest when due, lead to lower credit ratings and increase defaults. Such developments could, in turn, reduce the value of securities owned by the Fund and adversely affect the net asset value of the Fund. In addition, the prolonged continuation or further deterioration of current market conditions could adversely impact the Fund’s portfolio.

Investment Focus. The Fund invests a substantial portion of its assets in MBS and mortgage whole loans. As a result, the Fund will be affected to a greater degree by events affecting the MBS and mortgage whole loan markets, than if it invested in a broader array of securities, and such impact could be considerably greater than if it did not focus its investments to such an extent, particularly as a result of the leveraged nature of its investments. Such restrictions on the type of securities in which the Fund may invest may adversely affect the Fund’s ability to achieve its investment objectives.

The Fund employs a variety of proprietary risk analytics and risk management tools in connection with making and monitoring portfolio investments. Prospective investors should be aware that no risk management or portfolio analytics system is fail-safe, and no assurance can be given that risk frameworks employed by either FTFA and/or Western Asset (e.g., stop-win, stop-loss, Sharpe Ratios, loss limits, value-at-risk or any other methodology now known or later developed) will achieve their objectives and prevent or otherwise limit substantial losses. No assurance can be given that the risk management systems and techniques or pricing models will accurately predict future trading patterns or the manner in which investments are priced in financial markets in the future. In addition, certain risk management tools may rely on certain assumptions (e.g., historical interest rates, anticipated rate trends) and such assumptions may prove incorrect.

Competition for Investment Opportunities. Identifying, completing and realizing attractive portfolio investments is competitive and involves a high degree of uncertainty. The Fund’s profitability depends, in large part, on its ability to acquire target assets at attractive prices. In acquiring its target assets, the Fund will compete with a variety of institutional investors, including specialty finance companies, public and private funds (including other funds managed by FTFA or Western Asset), commercial and investment banks, commercial finance and insurance companies and other financial institutions. Many of the Fund’s competitors are substantially larger and have considerably greater financial, technical, marketing and other resources than does the Fund. Some competitors may have a lower cost of funds and access to funding sources that may not be available to the Fund, such as funding from the U.S. government, if the Fund is not eligible to participate in certain programs established by the U.S. government. In addition, some of the Fund’s competitors may have higher risk tolerances or different risk assessments, which could allow them to consider a wider variety of investments and establish more relationships than the Fund.

Western Asset Mortgage Opportunity Fund Inc.

Furthermore, competition for investments in the Fund’s target assets may lead to the price of such assets increasing, which may further limit the Fund’s ability to generate desired returns. The Fund cannot assure you that the competitive pressures it faces will not have a material adverse effect on its business, financial condition and results of operations. Also, as a result of this competition, desirable investments in the Fund’s target assets may be limited in the future and the Fund may not be able to take advantage of attractive investment opportunities from time to time, as the Fund can provide no assurance that it will be able to identify and make investments that are consistent with its investment objectives. Additional third-party managed investment funds with similar objectives may be formed in the future. Given the foregoing, it is possible that competition for appropriate portfolio investments may increase, thus reducing the number of attractive portfolio investment opportunities available to the Fund and may adversely affect the terms upon which investments can be made. There can be no assurance that the Fund will be able to locate, consummate and exit investments that satisfy its investment objective, or that it will be able to invest the net proceeds from this offering in MBS to the extent necessary to achieve its investment objectives.

Inflation/Deflation Risk. Inflation risk is the risk that the value of certain assets or income from the Fund’s investments will be worth less in the future as inflation decreases the value of money. As inflation increases, the real value of the Common Stock and distributions on the Common Stock can decline. In addition, during any periods of rising inflation, the dividend rates or borrowing costs associated with the Fund’s use of leverage would likely increase, which would tend to further reduce returns to stockholders. Deflation risk is the risk that prices throughout the economy decline over time—the opposite of inflation. Deflation may have an adverse effect on the creditworthiness of issuers and may make issuer defaults more likely, which may result in a decline in the value of the Fund’s portfolio.

Reinvestment Risk. Reinvestment risk is the risk that income from the Fund’s portfolio will decline if and when the Fund invests the proceeds from matured, traded or called bonds at market interest rates that are below the portfolio’s current earnings rate. A decline in income could affect the market price of Common Stock or your overall returns.

Reverse Repurchase Agreements Risk. The Fund’s use of reverse repurchase agreements involves many of the same risks involved in the Fund’s use of leverage, as the proceeds from reverse repurchase agreements generally will be invested in additional securities. There is a risk that the market value of the securities acquired in the reverse repurchase agreement may decline below the price of the securities that the Fund has sold but remains obligated to repurchase. In addition, there is a risk that the market value of the securities retained by the Fund may decline. If the buyer of securities under a reverse repurchase agreement were to file for bankruptcy or experience insolvency, the Fund may be adversely affected. Also, in entering into reverse repurchase agreements, the Fund would bear the risk of loss to the

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

extent that the proceeds of the reverse repurchase agreement are less than the value of the underlying securities. In addition, due to the interest costs associated with reverse repurchase agreements transactions, the Fund’s net asset value will decline, and, in some cases, the Fund may be worse off than if it had not used such instruments.

Repurchase Agreements Risk. Subject to its investment objectives and policies, the Fund may invest in repurchase agreements for investment purposes. Repurchase agreements typically involve the acquisition by the Fund of debt securities from a selling financial institution such as a bank, savings and loan association or broker-dealer. The agreement provides that the Fund will sell the securities back to the institution at a fixed time in the future. The Fund does not bear the risk of a decline in the value of the underlying security unless the seller defaults under its repurchase obligation. In the event of the bankruptcy or other default of a seller of a repurchase agreement, the Fund could experience both delays in liquidating the underlying securities and losses, including (1) possible decline in the value of the underlying security during the period in which the Fund seeks to enforce its rights thereto; (2) possible lack of access to income on the underlying security during this period; and (3) expenses of enforcing its rights. While repurchase agreements involve certain risks not associated with direct investments in debt securities, the Fund follows procedures approved by the Fund’s Board of Directors that are designed to minimize such risks. These procedures include effecting repurchase transactions only with large, well-capitalized and well-established financial institutions whose financial condition will be continually monitored by Western Asset. In addition, as described above, the value of the collateral underlying the repurchase agreement will be at least equal to the repurchase price, including any accrued interest earned on the repurchase agreement. In the event of a default or bankruptcy by a selling financial institution, the Fund generally will seek to liquidate such collateral. However, the exercise of the Fund’s right to liquidate such collateral could involve certain costs or delays and, to the extent that proceeds from any sale upon a default of the obligation to repurchase were less than the repurchase price, the Fund could suffer a loss.

Variable Debt Risk. The absence of an active secondary market with respect to particular variable and floating rate instruments could make it difficult for the Fund to dispose of a variable or floating rate note if the issuer defaulted on its payment obligation or during periods that the Fund is not entitled to exercise its demand rights, and the Fund could, for these or other reasons, suffer a loss with respect to such instruments.

Credit Default Swap Risk. The Fund may invest in credit default swap transactions for hedging or investment purposes. Credit default swap agreements involve greater risks than if the Fund had invested in the reference obligation directly since, in addition to general market risks, credit default swaps are subject to illiquidity risk, counterparty risk and credit risk. The “buyer” in a credit default contract is obligated to pay the “seller” a periodic

Western Asset Mortgage Opportunity Fund Inc.

stream of payments over the term of the contract, provided that no event of default on an underlying reference obligation has occurred. If an event of default occurs, the seller must pay the buyer the full notional value, or “par value,” of the reference obligation through either physical settlement or cash settlement. The Fund may be either the buyer or seller in a credit default swap transaction. If the Fund is a buyer and no event of default occurs, the Fund will have made a series of periodic payments and recover nothing of monetary value. However, if an event of default occurs, the Fund (if the buyer) will receive the full notional value of the reference obligation either through a cash payment in exchange for the asset or a cash payment in addition to owning the reference assets. As a seller, the Fund receives a fixed rate of income throughout the term of the contract, which typically is between six months and five years, provided that there is no event of default. The Fund currently intends to segregate assets on the Fund’s records in the form of cash, cash equivalents or liquid securities in an amount equal to the notional value of the credit default swaps of which it is the seller. If such assets are not fully segregated by the Fund, the use of credit default swap transactions could then be considered leverage for purposes of the 1940 Act and the Fund’s limits on leverage. Credit default swap transactions involve greater risks than if the Fund had invested in the reference obligation directly.

Structured Notes and Related Instruments Risk. The Fund may invest in “structured” notes and other related instruments, which are privately negotiated debt obligations where the principal and/or interest is determined by reference to the performance of a benchmark asset, market or interest rate (an “embedded index”), such as selected securities, an index of securities or specified interest rates, or the differential performance of two assets or markets, such as indexes reflecting bonds. Structured instruments may be issued by corporations, including banks, as well as by governmental agencies. Structured instruments frequently are assembled in the form of medium-term notes, but a variety of forms are available and may be used in particular circumstances. The terms of such structured instruments normally provide that their principal and/or interest payments are to be adjusted upwards or downwards (but ordinarily not below zero) to reflect changes in the embedded index while the structured instruments are outstanding. As a result, the interest and/or principal payments that may be made on a structured product may vary widely, depending on a variety of factors, including the volatility of the embedded index and the effect of changes in the embedded index on principal and/or interest payments. The rate of return on structured notes may be determined by applying a multiplier to the performance or differential performance of the referenced index(es) or other asset(s). Application of a multiplier involves leverage that will serve to magnify the potential for gain and the risk of loss.

Collateralized Debt Obligations. The Fund may invest in collateralized debt obligations (“CDOs”), which include collateralized bond obligations (“CBOs”), collateralized loan obligations (“CLOs”) and other securitized products. CDOs are a type of asset-backed

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

security where the collateral securities are typically composed of a diversified pool of loans or bonds. The risks of an investment in a CDO depend largely on the type of collateral securities and the class of the CDO in which the Fund invests. The Fund may invest in CDOs backed by corporate bond obligations, real estate loans and other asset classes. Normally, CDOs, CBOs, CLOs and other securitized products are privately offered and sold, and thus are not registered under the securities laws. As a result, investments in CDOs may be characterized by the Fund as illiquid securities. However, an active dealer market may exist for CDOs, allowing a CDO to qualify for transactions under Rule 144A of the Securities Act of 1933. In addition to the normal risks associated with fixed income securities and asset-backed securities, CDOs carry additional risks, including, but not limited to: (i) the possibility that distributions from collateral securities will not be adequate to make interest or other payments; (ii) the risk that the collateral may default or decline in value or be downgraded, if rated by a NRSRO; (iii) the Fund is likely to invest in tranches of CDOs that are subordinate to other tranches; (iv) the structure and complexity of the transaction and the legal documents could lead to disputes among investors regarding the characterization of proceeds; (v) the investment return achieved by the Fund could be significantly different than those predicted by financial models; (vi) the lack of a readily available secondary market for CDOs; (vii) risk of forced “fire sale” liquidation due to technical defaults such as coverage test failures; and (viii) the CDO’s manager may perform poorly.

Insolvency Considerations with Respect to Issuers of Indebtedness. Various laws enacted for the protection of U.S. creditors may apply to MBS in which the Fund invests. If a court in a lawsuit brought by an unpaid creditor or representative of the creditors of an issuer of MBS, such as a trustee in bankruptcy, were to find that the issuer did not receive fair consideration or reasonably equivalent value for incurring the indebtedness, and after giving effect to such indebtedness, the issuer (i) was insolvent, (ii) was engaged in a business for which the remaining assets of such issuer constituted unreasonably small capital or (iii) intended to incur, or believed that it would incur, debts beyond its ability to pay such debts as they mature, such court could determine to invalidate, in whole or in part, such indebtedness as a fraudulent conveyance, to subordinate such indebtedness to existing or future creditors of such issuer, or to recover amounts previously paid by such issuer in satisfaction of such indebtedness. The measure of insolvency for purposes of the foregoing will vary. Generally, an issuer would be considered insolvent at a particular time if the sum of its debts were then greater than all of its property at a fair valuation, or if the present fair saleable value of its assets was then less than the amount that would be required to pay its probable liabilities on its existing debts as they became absolute and matured. There can be no assurance as to what standard a court would apply in order to determine whether the issuer was “insolvent” after giving effect to the incurrence of the indebtedness in which the Fund invested or that, regardless of the method of valuation, a court would not determine that the issuer was “insolvent” upon giving effect to such

Western Asset Mortgage Opportunity Fund Inc.

incurrence. In addition, in the event of the insolvency of an issuer of indebtedness in which the Fund invests, payments made on such indebtedness could be subject to avoidance as a “preference” if made within a certain period of time (which may be as long as one year) before insolvency. In general, if payments on indebtedness are avoidable, whether as fraudulent conveyances or preferences, such payments can be recaptured from the Fund.

Portfolio Valuation for Financial Accounting and Other Reporting Purposes. Valuations of the portfolio investments may involve uncertainties and judgment determinations. Third-party pricing information can vary considerably from one dealer or pricing service to another, and may at times not be available regarding certain of the investments of the Fund. A disruption in the secondary markets for the investments of the Fund may make it difficult to obtain accurate market quotations for purposes of valuing portfolio investments for financial accounting, borrowing and other reporting purposes. Further, because of the overall size and concentrations in particular markets and maturities of positions that may be held by the Fund from time to time, the liquidation values of portfolio investments may differ significantly from the valuations of such portfolio investments derived from the valuation methods described herein.

Some of the Fund’s portfolio investments will be in the form of securities that are not publicly traded. The fair value of securities and other investments that are not publicly traded may not be readily determinable. The Fund will value these investments daily at fair value, as determined in accordance with FASB Accounting Statement Codification Topic 820, “Fair Value Measurements,” which may include unobservable inputs. Because such valuations are subjective, the fair value of certain of the Fund’s assets may fluctuate over short periods of time and the Fund’s determinations of fair value may differ materially from the values that would have been used if a ready market for these securities existed. The value of the Fund’s Common Stock could be adversely affected if the Fund’s determinations regarding the fair value of these investments were materially higher than the values that it ultimately realizes upon their disposal.

Inverse Floating Rate Securities and Tender Option Bonds Risk. Subject to certain limitations, the Fund may invest in inverse floating rate securities. Typically, inverse floating rate securities represent beneficial interests in a special purpose trust (sometimes called a “tender option bond trust”) formed by a third party sponsor for the purpose of holding MBS purchased from the Fund or from another third party. An investment in an inverse floating rate security may involve greater risk than an investment in a fixed-rate bond. Because changes in the interest rate on the underlying security or index inversely affect the residual interest paid on the inverse floating rate security, the value of an inverse floating rate security is generally more volatile than that of a fixed-rate bond.

Inverse floating rate securities have interest rate adjustment formulas which generally reduce or, in the extreme, eliminate the interest paid to the Fund when short-term interest

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

rates rise, and increase the interest paid to the Fund when short-term interest rates fall. Inverse floating rate securities have varying degrees of liquidity, and the market for these securities is relatively volatile. These securities tend to underperform the market for fixed-rate bonds in a rising interest rate environment, but tend to outperform the market for fixed-rate bonds when interest rates decline. Shifts in long-term interest rates may, however, alter this tendency.

During times of reduced market liquidity, such as at the present, the Fund may not be able to sell MBS readily at prices reflecting the values at which the securities are carried on the Fund’s books. Sales of large blocks of MBS by market participants, such as the Fund, that are seeking liquidity can further reduce MBS prices in an illiquid market. The Fund may seek to make sales of large blocks of MBS as part of its investment strategy or it may be required to raise cash to re-collateralize, unwind or “collapse” tender option bond trusts that issued inverse floating rate securities to the Fund or to make payments to such trusts to enable them to pay for tenders of the short-term securities they have issued if the remarketing agents for those MBS are unable to sell the short-term securities in the marketplace to other buyers. The Fund’s potential exposure to losses related to or on inverse floating rate securities may increase beyond the value of the Fund’s inverse floater investments as the Fund may potentially be liable to fulfill all amounts owed to holders of the floating rate certificates.

Although volatile, inverse floating rate securities typically offer the potential for yields exceeding the yields available on fixed-rate bonds with comparable credit quality, coupon, call provisions and maturity. These securities usually permit the investor to convert the floating rate to a fixed rate (normally adjusted downward), and this optional conversion feature may provide a partial hedge against rising rates if exercised at an opportune time.

Investment in inverse floating rate securities may amplify the effects of the Fund’s use of leverage. Any economic effect of leverage through the Fund’s purchase of inverse floating rate securities will create an opportunity for increased Common Stock net income and returns, but may also result in losses if the cost of leverage exceeds the value of the securities underlying the tender option bond trust or the return on the inverse floating rate securities purchased by the Fund.

Other Investment Companies Risk. The Fund may invest in the securities of other investment companies. Such securities may be leveraged. As a result, the Fund may be indirectly exposed to leverage through an investment in such securities. Utilization of leverage is a speculative investment technique and involves certain risks. An investment in securities of other investment companies that are leveraged may expose the Fund to higher volatility in the market value of such securities and the possibility that the Fund’s long-term returns on such securities (and, indirectly, the long-term returns of the Common Stock) will be diminished.

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Risks Related to Fund Distributions. Limited liquidity in the MBS market may affect the market price of MBS securities, thereby adversely affecting the net asset values of the Fund and its ability to make dividend distributions.

Derivatives Risk. The Fund may invest in derivative instruments, such as options contracts, futures contracts, options on futures contracts, indexed securities, credit linked notes, credit default swaps and other swap agreements for investment, hedging and risk management purposes; provided that the Fund’s use of derivative instruments, as measured by the total notional amount of all such instruments, will not exceed 20% of its Managed Assets. With respect to this limitation, the Fund may net derivatives with opposite exposure to the same underlying instrument. Notwithstanding the foregoing, the Fund may invest without limitation in Treasury futures, Eurodollar futures, interest rate swaps, swaptions or similar instruments and combinations thereof. Using derivatives can increase Fund losses and reduce opportunities for gains when market prices, interest rates, currencies, or the derivatives themselves behave in a way not anticipated by the Fund. Using derivatives also can have a leveraging effect and increase Fund volatility. Certain derivatives have the potential for unlimited loss, regardless of the size of the initial investment. Derivatives may not be available at the time or price desired, may be difficult to sell, unwind or value, and the counterparty may default on its obligations to the Fund. Derivatives are generally subject to the risks applicable to the assets, rates, indices or other indicators underlying the derivative. The value of a derivative may fluctuate more than the underlying assets, rates, indices or other indicators to which it relates. Use of derivatives may have different tax consequences for the Fund than an investment in the underlying security, and those differences may affect the amount, timing and character of income distributed to shareholders. The U.S. government and foreign governments are in the process of adopting and implementing regulations governing derivatives markets, including mandatory clearing of certain derivatives, margin and reporting requirements. The ultimate impact of the regulations remains unclear. Additional regulation of derivatives may make derivatives more costly, limit their availability or utility, otherwise adversely affect their performance or disrupt markets.

The Fund operates under Rule 18f-4 under the 1940 Act which, among other things, governs the use of derivative investments and certain financing transactions (e.g. reverse repurchase agreements) by registered investment companies. Among other things, Rule 18f-4 requires funds that invest in derivative instruments beyond a specified limited amount to apply a value at risk (VaR) based limit to their use of certain derivative instruments and financing transactions and to adopt and implement a derivatives risk management program. A fund that uses derivative instruments in a limited amount is not subject to the full requirements of Rule 18f-4. Compliance with Rule 18f-4 by the Fund could, among other things, make derivatives more costly, limit their availability or utility, or

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

otherwise adversely affect their performance. Rule 18f-4 may limit the Fund’s ability to use derivatives as part of its investment strategy.

Credit default swap contracts involve heightened risks and may result in losses to the Fund. Credit default swaps may be illiquid and difficult to value. When the Fund sells credit protection via a credit default swap, credit risk increases since the Fund has exposure to both the issuer whose credit is the subject of the swap and the counterparty to the swap.

Short Sales Risk. To the extent the Fund makes use of short sales for investment and/or risk management purposes, the Fund may be subject to risks associated with selling short. Short sales are transactions in which the Fund sells securities or other instruments that the Fund does not own. Short sales expose the Fund to the risk that it will be required to cover its short position at a time when the securities have appreciated in value, thus resulting in a loss to the Fund. The Fund may engage in short sales where it does not own or have the right to acquire the security sold short at no additional cost. The Fund’s loss on a short sale theoretically could be unlimited in a case where the Fund is unable, for whatever reason, to close out its short position. In addition, the Fund’s short selling strategies may limit its ability to benefit from increases in the markets. If the Fund engages in short sales, it will segregate liquid assets, enter into offsetting transactions or own positions covering its obligations; however, such segregation and cover requirements will not limit or offset losses on related positions. Short selling also involves a form of financial leverage that may exaggerate any losses realized by the Fund. Also, there is the risk that the counterparty to a short sale may fail to honor its contractual terms, causing a loss to the Fund. The Fund will incur transaction costs with any short sales, which will be borne by shareholders. Finally, regulations imposed by the SEC or other regulatory bodies relating to short selling may restrict the Fund’s ability to engage in short selling.

The Fund’s obligation to replace a borrowed security is secured by collateral deposited with the broker-dealer, usually cash, U.S. government securities or other liquid securities similar to those borrowed. The Fund is also required to segregate similar collateral to the extent, if any, necessary so that the value of both collateral amounts in the aggregate is at all times equal to at least 100% of the current market value of the security sold short. Depending on arrangements made with the broker-dealer from which the Fund borrowed the security regarding payment over of any payments received by us on such security, the Fund may not receive any payments (including interest) on the collateral deposited with such broker-dealer.

Risks of Short Economic Exposure Through Derivatives. The use by the Fund of derivatives such as options, forwards or futures contracts for investment and/or risk management purposes may subject the Fund to risks associated with short economic exposure through such derivatives. Taking a short economic position through derivatives exposes the Fund to the risk that it will be obligated to make payments to its counterparty if the underlying asset

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appreciates in value, thus resulting in a loss to the Fund. The Fund’s loss on a short position using derivatives theoretically could be unlimited.

Liquidity Risk. The Fund may invest in MBS, for which there is no readily available trading market or which are otherwise illiquid. Liquidity risk exists when particular investments are difficult to sell. Securities may become illiquid after purchase by the Fund, particularly during periods of market turmoil. When the Fund holds illiquid investments, the portfolio may be harder to value, especially in changing markets, and if the Fund is forced to sell these investments for cash needs, the Fund may suffer a loss.

When-Issued and Delayed-Delivery Transactions Risk. The Fund may purchase fixed income securities on a when-issued basis, and may purchase or sell those securities for delayed delivery. When-issued and delayed-delivery transactions occur when securities are purchased or sold by the Fund with payment and delivery taking place in the future to secure an advantageous yield or price. Securities purchased on a when-issued or delayed-delivery basis may expose the Fund to counterparty risk of default as well as the risk that securities may experience fluctuations in value prior to their actual delivery. The Fund will not accrue income with respect to a when-issued or delayed-delivery security prior to its stated delivery date. Purchasing securities on a when-issued or delayed-delivery basis can involve the additional risk that the price or yield available in the market when the delivery takes place may not be as favorable as that obtained in the transaction itself.

Risks Related to Potential Conflicts of Interest. FTFA, Western Asset and the portfolio managers have interests which may conflict with the interests of the Fund. FTFA and Western Asset may at some time in the future manage and/or advise other investment funds or accounts with the same or substantially similar investment objective and strategies as the Fund. As a result, FTFA, Western Asset and the Fund’s portfolio managers may devote unequal time and attention to the management of the Fund and those other funds and accounts, and may not be able to formulate as complete a strategy or identify equally attractive investment opportunities as might be the case if they were to devote substantially more attention to the management of the Fund. FTFA, Western Asset and the Fund’s portfolio managers may identify a limited investment opportunity that may be suitable for multiple funds and accounts, and the opportunity may be allocated among these several funds and accounts, which may limit the Fund’s ability to take full advantage of the investment opportunity. Additionally, transaction orders may be aggregated for multiple accounts for purpose of execution, which may cause the price or brokerage costs to be less favorable to the Fund than if similar transactions were not being executed concurrently for other accounts. At times, a portfolio manager may determine that an investment opportunity may be appropriate for only some of the funds and accounts for which he or she exercises investment responsibility, or may decide that certain of the funds and accounts should take differing positions with respect to a particular security. In these cases, the

Western Asset Mortgage Opportunity Fund Inc.

Summary of information regarding the Fund (unaudited) (cont’d)

portfolio manager may place separate transactions for one or more funds or accounts which may affect the market price of the security or the execution of the transaction, or both, to the detriment or benefit of one or more other funds and accounts. For example, a portfolio manager may determine that it would be in the interest of another account to sell a security that the Fund holds, potentially resulting in a decrease in the market value of the security held by the Fund.

The portfolio managers may also engage in cross trades between funds and accounts, may select brokers or dealers to execute securities transactions based in part on brokerage and research services provided to FTFA or Western Asset which may not benefit all funds and accounts equally and may receive different amounts of financial or other benefits for managing different funds and accounts. Finally, FTFA or its affiliates may provide more services to some types of funds and accounts than others.

There is no guarantee that the policies and procedures adopted by FTFA, Western Asset and the Fund will be able to identify or mitigate the conflicts of interest that arise between the Fund and any other investment funds or accounts that FTFA and/or Western Asset may manage or advise from time to time.

Portfolio Turnover Risk. The Fund’s annual portfolio turnover rate may vary greatly from year to year. Changes to the investments of the Fund may be made regardless of the length of time particular investments have been held. A high portfolio turnover rate may result in increased transaction costs for the Fund in the form of increased dealer spreads and other transactional costs, which may have an adverse impact on the Fund’s performance. In addition, high portfolio turnover may result in the realization of net short-term capital gains by the Fund which, when distributed to stockholders, will be taxable as ordinary income. A high portfolio turnover may increase the Fund’s current and accumulated earnings and profits, resulting in a greater portion of the Fund’s distributions being treated as a dividend to the Fund’s stockholders. The portfolio turnover rate of the Fund will vary from year to year, as well as within a given year.

Anti-Takeover Provisions Risk. The Charter and Bylaws of the Fund include provisions that are designed to limit the ability of other entities or persons to acquire control of the Fund for short-term objectives, including by converting the Fund to open-end status or changing the composition of the Board, that may be detrimental to the Fund’s ability to achieve its primary investment objective of seeking high current income exempt from federal income taxes. The Bylaws also contain a provision providing that the Board of Directors has adopted a resolution to opt in the Fund to the provisions of the Maryland Control Share Acquisition Act (“MCSAA”). There can be no assurance, however, that such provisions will be sufficient to deter professional arbitrageurs that seek to cause the Fund to take actions that may not be consistent with its investment objective or aligned with the interests of long-term shareholders, such as liquidating debt investments prior to maturity, triggering

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taxable events for shareholders and decreasing the size of the Fund. Such provisions may limit the ability of shareholders to sell their shares at a premium over prevailing market prices by discouraging an investor from seeking to obtain control of the Fund.

In determining to opt in to the MCSAA, the Board considered its fiduciary obligations to the Fund. In particular, the Board considered whether the interests of a short-term professional investor seeking to arbitrage the Fund’s market price would be consistent with the interests of Common Stockholders that invested in the Fund due to its investment objective of total return with an emphasis on income. In order to seek to allow the Fund to achieve its investment objective for those long-term Common Stockholders, the Board determined that it would be in the best interests of the Fund to opt in to the MCSAA. In making this decision, the Board considered a decision in the U.S. District Court for the District of Maryland, which had the effect of allowing a closed-end fund organized in Maryland to remain opted in to the MCSAA notwithstanding a counterclaim alleging that the fund’s decision to opt in to the MCSAA violated Section18(i) of the 1940 Act. A recent decision by the U.S. District Court for the Southern District of New York, however, held that certain Funds that opted into the MCSAA violated Section18(i) of the 1940 Act. The decision has been affirmed by the U.S. Court of Appeals for the Second Circuit. These decisions are incompatible with the prior decision in Maryland federal court that allowed a registered closed-end fund organized as a Maryland corporation to remain opted into the MCSAA, resulting in a circuit split on the issue. There is a risk that a court could follow the reasoning of the New York federal court, as opposed to the decision of the Maryland federal court, when determining whether a closed-end fund organized in Maryland can opt in to the MCSAA.

Market Events Risk. The market values of securities or other assets will fluctuate, sometimes sharply and unpredictably, due to factors such as economic events, governmental actions or intervention, actions taken by the U.S. Federal Reserve or foreign central banks, market disruptions caused by trade disputes, or other factors, political developments, armed conflicts, economic sanctions and countermeasures in response to sanctions, major cybersecurity events, the global and domestic effects of widespread or local health, weather or climate events, and other factors that may or may not be related to the issuer of the security or other asset. Economies and financial markets throughout the world are increasingly interconnected. Economic, financial or political events, trading and tariff arrangements, public health events, terrorism, wars, natural disasters and other circumstances in one country or region could have profound impacts on global economies or markets. As a result, whether or not the Fund invests in securities of issuers located in or with significant exposure to the countries or markets directly affected, the value and liquidity of the Fund’s investments may be negatively affected.

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Summary of information regarding the Fund (unaudited) (cont’d)

The long-term impact of the COVID-19 pandemic and its subsequent variants on economies, markets, industries and individual issuers is not known. The U.S. government and the Federal Reserve, as well as certain foreign governments and central banks, took extraordinary actions to support local and global economies and the financial markets in response to the COVID-19 pandemic. This and other government intervention into the economy and financial markets have resulted in a large expansion of government deficits and debt, the long term consequences of which are not known.

Raising the ceiling on U.S. government debt has become increasingly politicized. Any failure to increase the total amount that the U.S. government is authorized to borrow could lead to a default on U.S. government obligations, with unpredictable consequences for economies and markets in the U.S. and elsewhere. Recently, inflation and interest rates have been volatile and may increase in the future. These circumstances could adversely affect the value and liquidity of the fund’s investments, impair the fund’s ability to satisfy redemption requests, and negatively impact the fund’s performance.

The United States and other countries are periodically involved in disputes over trade and other matters, which may result in tariffs, investment restrictions and adverse impacts on affected companies and securities or the broader U.S. or global economies. For example, the United States has imposed tariffs and other trade barriers on Chinese exports, has restricted sales of certain categories of goods to China, and has established barriers to investments in China. Trade disputes may adversely affect the economies of the United States and its trading partners, as well as companies directly or indirectly affected and financial markets generally. The United States government has prohibited U.S. persons from investing in Chinese companies designated as related to the Chinese military. These and possible future restrictions could limit the fund’s opportunities for investment and require the sale of securities at a loss or make them illiquid. Moreover, the Chinese government is involved in a longstanding dispute with Taiwan that has included threats of invasion. If the political climate between the United States and China does not improve or continues to deteriorate, if China were to attempt unification of Taiwan by force, or if other geopolitical conflicts develop or get worse, economies, markets and individual securities may be severely affected both regionally and globally, and the value of the fund’s assets may go down.

Legal and Regulatory Risk. Legal, tax and regulatory changes could occur and may adversely affect the Fund and its ability to pursue its investment strategies and/or increase the costs of implementing such strategies. New (or revised) laws or regulations may be imposed by the CFTC, the SEC, the U.S. Federal Reserve or other banking regulators, other governmental regulatory authorities or self-regulatory organizations that supervise the financial markets that could adversely affect the Fund. In particular, these agencies are empowered to promulgate a variety of new rules pursuant to recently enacted financial

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reform legislation in the United States. The Fund also may be adversely affected by changes in the enforcement or interpretation of existing statutes and rules by these governmental regulatory authorities or self-regulatory organizations.

In addition, the securities and futures markets are subject to comprehensive statutes, regulations and margin requirements. The CFTC, the SEC, the Federal Deposit Insurance Corporation, other regulators and self-regulatory organizations and exchanges are authorized under these statutes, regulations and otherwise to take extraordinary actions in the event of market emergencies. The Fund and the Investment Manager have historically been eligible for exemptions from certain regulations. However, there is no assurance that the Fund and FTFA will continue to be eligible for such exemptions.

The U.S. Government enacted legislation that provides for new regulation of the derivatives market, including clearing, margin, reporting, recordkeeping, and registration requirements. Although the CFTC has released final rules relating to clearing, reporting, recordkeeping and registration requirements under the legislation, certain of the provisions are subject to further final rule making, and thus its ultimate impact remains unclear. New regulations could, among other things, restrict the Fund’s ability to engage in derivatives transactions (for example, by making certain types of derivatives transactions no longer available to the Fund) and/or increase the costs of such derivatives transactions (for example, by increasing margin or capital requirements), and the Fund may be unable to execute its investment strategies as a result. It is unclear how the regulatory changes will affect counterparty risk.

The CFTC and certain futures exchanges have established limits, referred to as “position limits,” on the maximum net long or net short positions which any person may hold or control in particular options and futures contracts; those position limits may also apply to certain other derivatives positions the Fund may wish to take. All positions owned or controlled by the same person or entity, even if in different accounts, may be aggregated for purposes of determining whether the applicable position limits have been exceeded. Thus, even if the Fund does not intend to exceed applicable position limits, it is possible that different clients managed by the Investment Manager and its affiliates may be aggregated for this purpose. Therefore it is possible that the trading decisions of the Investment Manager may have to be modified and that positions held by the Fund may have to be liquidated in order to avoid exceeding such limits. The modification of investment decisions or the elimination of open positions, if it occurs, may adversely affect the performance of the Fund.

The SEC has in the past adopted interim rules requiring reporting of all short positions above a certain de minimis threshold and may adopt rules requiring monthly public disclosure in the future. In addition, other non-U.S. jurisdictions where the Fund may trade have adopted reporting requirements. To the extent that the Fund takes a short position, if such short position or strategy become generally known, it could have a significant effect

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Summary of information regarding the Fund (unaudited) (cont’d)

on the Fund’s ability to implement its investment strategy. In particular, it would make it more likely that other investors could cause a “short squeeze” in the securities held short by the Fund forcing the Fund to cover its positions at a loss. Such reporting requirements also may limit the Investment Manager’s ability to access management and other personnel at certain companies where the Fund seeks to take a short position. In addition, if other investors engage in copycat behavior by taking positions in the same issuers as the Fund, the cost of borrowing securities to sell short could increase drastically and the availability of such securities to the Fund could decrease drastically. Such events could make the Fund unable to execute its investment strategy. In addition, the SEC and other regulatory and self-regulatory authorities have implemented various rules and may adopt additional rules in the future that may impact those engaging in short selling activity. If additional rules were adopted regarding short sales, they could restrict the Fund’s ability to engage in short sales in certain circumstances, and the Fund may be unable to execute certain investment strategies as a result.

The SEC and regulatory authorities in other jurisdictions may adopt (and in certain cases, have adopted) bans on short sales of certain securities in response to market events. Bans on short selling may make it impossible for the Fund to execute certain investment strategies.

Valuation Risk. The sales price the Fund could receive for any particular portfolio investment may differ from the Fund’s valuation of the investment, particularly for securities that trade in thin or volatile markets or that are valued using a fair value methodology. These differences may increase significantly and affect Fund investments more broadly during periods of market volatility. The Fund’s ability to value its investments may be impacted by technological issues and/or errors by pricing services or other third party service providers. The valuation of the Fund’s investments involves subjective judgment.

Operational Risk. The valuation of the Fund’s investments may be negatively impacted because of the operational risks arising from factors such as processing errors and human errors, inadequate or failed internal or external processes, failures in systems and technology, changes in personnel, and errors caused by third party service providers or trading counterparties. It is not possible to identify all of the operational risks that may affect the Fund or to develop processes and controls that completely eliminate or mitigate the occurrence of such failures. The Fund and its shareholders could be negatively impacted as a result.

Cybersecurity Risk. Like other funds and business enterprises, the fund, the manager, the subadvisers and their service providers are subject to the risk of cyber incidents occurring from time to time. Cybersecurity incidents, whether intentionally caused by third parties or otherwise, may allow an unauthorized party to gain access to fund assets, fund or customer data (including private shareholder information) or proprietary information, cause the fund,

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the manager, the subadvisers and/or their service providers (including, but not limited to, fund accountants, custodians, sub-custodians, transfer agents and financial intermediaries) to suffer data breaches, data corruption or loss of operational functionality, or prevent fund investors from purchasing, redeeming or exchanging shares, receiving distributions or receiving timely information regarding the fund or their investment in the fund. The fund, the manager, and the subadvisers have limited ability to prevent or mitigate cybersecurity incidents affecting third party service providers, and such third party service providers may have limited indemnification obligations to the fund, the manager, and/or the subadvisers. Cybersecurity incidents may result in financial losses to the fund and its shareholders, and substantial costs may be incurred in order to prevent or mitigate any future cybersecurity incidents. Issuers of securities in which the fund invests are also subject to cybersecurity risks, and the value of these securities could decline if the issuers experience cybersecurity incidents.

New ways to carry out cyber attacks continue to develop. There is a chance that some risks have not been identified or prepared for, or that an attack may not be detected, which puts limitations on the fund’s ability to plan for or respond to a cyber attack.

More Information

For a complete list of the Fund’s fundamental investment restrictions and more detailed descriptions of the Fund’s investment policies, strategies and risks, see the Fund’s registration statement on Form N-2 that was declared effective by the SEC on August 28, 2024. The Fund’s fundamental investment restrictions may not be changed without the approval of the holders of a majority of the outstanding voting securities, as defined in the 1940 Act.

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Dividend reinvestment plan (unaudited)

Unless you elect to receive distributions in cash (i.e., opt-out), all dividends, including any capital gain dividends and return of capital distributions, on your Common Stock will be automatically reinvested by Computershare Trust Company, N.A., as agent for the stock- holders (the “Plan Agent”), in additional shares of Common Stock under the Fund’s Dividend Reinvestment Plan (the “Plan”). You may elect not to participate in the Plan by contacting the Plan Agent. If you do not participate, you will receive all cash distributions paid by check mailed directly to you by Computershare Trust Company, N.A., as dividend paying agent.

If you participate in the Plan, the number of shares of Common Stock you will receive will be determined as follows:

(1) If the market price of the Common Stock (plus $0.03 per share commission) on the payment date (or, if the payment date is not a NYSE trading day, the immediately preceding trading day) is equal to or exceeds the net asset value per share of the Common Stock at the close of trading on the NYSE on the payment date, the Fund will issue new Common Stock at a price equal to the greater of (a) the net asset value per share at the close of trading on the NYSE on the payment date or (b) 95% of the market price per share of the Common Stock on the payment date.

(2) If the net asset value per share of the Common Stock exceeds the market price of the Common Stock (plus $0.03 per share commission) at the close of trading on the NYSE on the payment date, the Plan Agent will receive the dividend or distribution in cash and will buy Common Stock in the open market, on the NYSE or elsewhere, for your account as soon as practicable commencing on the trading day following the payment date and terminating no later than the earlier of (a) 30 days after the dividend or distribution payment date, or (b) the payment date for the next succeeding dividend or distribution to be made to the stockholders; except when necessary to comply with applicable provisions of the federal securities laws. If during this period: (i) the market price (plus $0.03 per share commission) rises so that it equals or exceeds the net asset value per share of the Common Stock at the close of trading on the NYSE on the payment date before the Plan Agent has completed the open market purchases or (ii) if the Plan Agent is unable to invest the full amount eligible to be reinvested in open market purchases, the Plan Agent will cease purchasing Common Stock in the open market and the Fund shall issue the remaining Common Stock at a price per share equal to the greater of (a) the net asset value per share at the close of trading on the NYSE on the day prior to the issuance of shares for reinvestment or (b) 95% of the then current market price per share.

Common Stock in your account will be held by the Plan Agent in non-certificated form. Any proxy you receive will include all shares of Common Stock you have received under the Plan. You may withdraw from the Plan (i.e., opt-out) by notifying the Plan Agent in writing at P.O. Box 43006, Providence, RI 02940-3078 or by calling the Plan Agent at 1-888-888-0151. Such withdrawal will be effective immediately if notice is received by the Plan Agent not less than ten business days prior to any dividend or distribution record date; otherwise such

106

Western Asset Mortgage Opportunity Fund Inc.

withdrawal will be effective as soon as practicable after the Plan Agent’s investment of the most recently declared dividend or distribution on the Common Stock.

Plan participants who sell their shares will be charged a service charge (currently $5.00 per transaction) and the Plan Agent is authorized to deduct brokerage charges actually incurred from the proceeds (currently $0.05 per share commission). There is no service charge for reinvestment of your dividends or distributions in Common Stock. However, all participants will pay a pro rata share of brokerage commissions incurred by the Plan Agent when it makes open market purchases. Because all dividends and distributions will be automatically reinvested in additional shares of Common Stock, this allows you to add to your investment through dollar cost averaging, which may lower the average cost of your Common Stock over time. Dollar cost averaging is a technique for lowering the average cost per share over time if the Fund’s net asset value declines. While dollar cost averaging has definite advantages, it cannot assure profit or protect against loss in declining markets.

Automatically reinvesting dividends and distributions does not mean that you do not have to pay income taxes due upon receiving dividends and distributions. Investors will be subject to income tax on amounts reinvested under the Plan.

The Fund reserves the right to amend or terminate the Plan if, in the judgment of the Board of Directors, the change is warranted. The Plan may be terminated, amended or supplemented by the Fund upon notice in writing mailed to stockholders at least 30 days prior to the record date for the payment of any dividend or distribution by the Fund for which the termination or amendment is to be effective. Upon any termination, you will be sent cash for any fractional share of Common Stock in your account. You may elect to notify the Plan Agent in advance of such termination to have the Plan Agent sell part or all of your Common Stock on your behalf. Additional information about the Plan and your account may be obtained from the Plan Agent at P.O. Box 43006, Providence, RI 02940-3078 or by calling the Plan Agent at 1-888-888-0151.

Western Asset Mortgage Opportunity Fund Inc.

107

Important tax information (unaudited)

By mid-February, tax information related to a shareholder’s proportionate share of distributions paid during the preceding calendar year will be received, if applicable. Please also refer to www.franklintempleton.com for per share tax information related to any distributions paid during the preceding calendar year. Shareholders are advised to consult with their tax advisors for further information on the treatment of these amounts on their tax returns.

The following tax information for the Fund is required to be furnished to shareholders with respect to income earned and distributions paid during its fiscal year.

The Fund hereby reports the following amounts, or if subsequently determined to be different, the maximum allowable amounts, for the fiscal year ended December 31, 2025:

	Pursuant to:	Amount Reported
Qualified Net Interest Income (QII)	§871(k)(1)(C)	$9,320,020
Section 163(j) Interest Earned	§163(j)	$5,572,288

108

Western Asset Mortgage Opportunity Fund Inc.

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Western Asset

Mortgage Opportunity Fund Inc.

Directors

Robert D. Agdern

Carol L. Colman

Anthony Grillo

Eileen A. Kamerick

Chair

Nisha Kumar

Peter Mason

Hillary A. Sale

Jane Trust

Officers

Jane Trust
President and Chief Executive
Officer

Christopher Berarducci
Treasurer and Principal Financial
Officer

Fred Jensen
Chief Compliance Officer

Marc A. De Oliveira
Secretary and Chief Legal Officer

Thomas C. Mandia
Senior Vice President

Jeanne M. Kelly
Senior Vice President

Western Asset Mortgage Opportunity Fund Inc.

One Madison Avenue
17th Floor
New York, NY 10010

Investment manager

Franklin Templeton Fund Adviser, LLC

Subadvisers

Western Asset Management Company, LLC

Western Asset Management Company Limited

Custodian

The Bank of New York Mellon

Transfer agent

Computershare Inc.
P.O. Box 43006
Providence, RI 02940-3078

Independent registered
public accounting firm

PricewaterhouseCoopers LLP
Baltimore, MD

Legal counsel

Simpson Thacher & Bartlett LLP
900 G Street NW
Washington, DC 20001

New York Stock
Exchange Symbol

DMO

Western Asset Mortgage Opportunity Fund Inc.

Western Asset Mortgage Opportunity Fund Inc.
One Madison Avenue
17th Floor
New York, NY 10010

Notice is hereby given in accordance with Section 23(c) of the Investment Company Act of 1940, as amended, that from time to time the Fund may purchase, at market prices, shares of its stock.

The Fund files its complete schedule of portfolio holdings with the Securities and Exchange Commission (“SEC”) for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. The Fund’s Forms N-PORT are available on the SEC’s website at www.sec.gov. To obtain information on Form N-PORT, shareholders can call the Fund at 1-888-777-0102.

Information on how the Fund voted proxies relating to portfolio securities during the prior 12-month period ended June 30th of each year and a description of the policies and procedures that the Fund uses to determine how to vote proxies related to portfolio transactions are available (1) without charge, upon request, by calling 1-888-777-0102, (2) at www.franklintempleton.com and (3) on the SEC’s website at www.sec.gov.

Quarterly performance, semi-annual and annual reports, current net asset value and other information regarding the Fund may be found on Franklin Templeton’s website, which can be accessed at www.franklintempleton.com. Any reference to Franklin Templeton’s website in this report is intended to allow investors public access to information regarding the Fund and does not, and is not intended to, incorporate Franklin Templeton’s website in this report.

This report is transmitted to the shareholders of Western Asset Mortgage Opportunity Fund Inc. for their information. This is not a prospectus, circular or representation intended for use in the purchase of shares of the Fund or any securities mentioned in this report.

Computershare Inc.
P.O. Box 43006
Providence, RI 02940-3078

90724-A 2/26

(b) Not applicable

ITEM 2.

CODE OF ETHICS.

a) The Registrant has adopted a code of ethics that applies to its principal executive officers and principal financial and accounting officer.

(d) N/A

(f) Pursuant to Item 19(a) (1), the Registrant is attaching as an exhibit a copy of its code of ethics that applies to its principal executive officers and principal financial and accounting officer.

ITEM 3.

AUDIT COMMITTEE FINANCIAL EXPERT.

The Board of Directors of the Registrant has determined that Eileen A. Kamerick and Nisha Kumar, possesses the technical attributes identified in Item 3 to Form N-CSR to qualify as an “audit committee financial experts,” and has designated Eileen A. Kamerick and Nisha Kumar, as the Audit Committee’s financial experts. Eileen A. Kamerick and Nisha Kumar are an “independent” Trustee pursuant to paragraph (a)(2) of Item 3 to Form N-CSR.

Under applicable securities laws, a person determined to be an audit committee financial expert will not be deemed an “expert” for any purpose, including without limitation for the purposes of Section 11 of the Securities Act of 1933, as a result of being designated or identified as an audit committee financial expert. The designation or identification of a person as an audit committee financial expert does not impose on such person any duties, obligations, or liabilities greater than the duties, obligations, and liabilities imposed on such person as a member of the audit committee and board of directors in the absence of such designation or identification. The designation or identification of a person as an audit committee financial expert does not affect the duties, obligations, or liability of any other member of the audit committee or board of directors.

Item 4.

Principal Accountant Fees and Services.

(a) Audit Fees. The aggregate fees billed in the previous fiscal years ending December 31, 2024 and December 31, 2025 (the “Reporting Periods”) for professional services rendered by the Registrant’s principal accountant (the “Auditor”) for the audit of the Registrant’s annual financial statements, or services that are normally provided by the Auditor in connection with the statutory and regulatory filings or engagements for the Reporting Periods, were $93,932 in December 31, 2024 and $94,871 in December 31, 2025.

(b) Audit-Related Fees. The aggregate fees billed in the Reporting Period for assurance and related services by the Auditor that are reasonably related to the performance of the Registrant’s financial statements were $0 in December 31, 2024 and $0 in December 31, 2025.

(c) Tax Fees. he aggregate fees billed in the Reporting Periods for professional services rendered by the Auditor for tax compliance, tax advice and tax planning (“Tax Services”) were $10,000 in December 31, 2024 and $10,000 in December 31, 2025. These services consisted of (i) review or preparation of U.S. federal, state, local and excise tax returns; (ii) U.S. federal, state and local tax planning, advice and assistance regarding statutory, regulatory or administrative developments, and (iii) tax advice regarding tax qualification matters and/or treatment of various financial instruments held or proposed to be acquired or held.

There were no fees billed for tax services by the Auditors to the Registrant’s investment manager and any entity controlling, controlled by, or under common control with the investment manager that provides ongoing services to the Registrant (“Service Affiliates”) during the Reporting Periods that required pre-approval by the Audit Committee.

(d) All Other Fees. The aggregate fees billed in the Reporting Periods for products and services provided by the Auditor to the Registrant, other than the services reported in paragraphs (a) through (c) of this item, were $28,000 in December 31, 2024 and $23,000 in December 31, 2025.

There were no other non-audit services rendered by the Auditor to the Service Affiliates requiring pre-approval by the Audit Committee in the Reporting Periods.

(e) Audit Committee’s pre-approval policies and procedures described in paragraph (c) (7) of Rule 2-01 of Regulation S-X.

(1) The Charter for the Audit Committee (the “Committee”) of the Board of each registered investment company (the “Fund”) advised by the Registrant’s investment manager or one of their affiliates (each, an “Adviser”) requires that the Committee shall approve (a) all audit and permissible non-audit services to be provided to the Fund and (b) all permissible non-audit services to be provided by the Fund’s independent auditors to the Adviser and any service providers controlling, controlled by or under common control with the Adviser that provide ongoing services to the Fund (“Covered Service Providers”) if the engagement relates directly to the operations and financial reporting of the Fund. The Committee may implement policies and procedures by which such services are approved other than by the full Committee.

The Committee shall not approve non-audit services that the Committee believes may impair the independence of the auditors. As of the date of the approval of this Audit Committee Charter, permissible non-audit services include any professional services (including tax services), that are not prohibited services as described below, provided to the Fund by the independent auditors, other than those provided to the Fund in connection with an audit or a review of the financial statements of the Fund. Permissible non-audit services may not include: (i) bookkeeping or other services related to the accounting records or financial statements of the Fund; (ii) financial information systems design and implementation; (iii) appraisal or valuation services, fairness opinions or contribution-in-kind reports; (iv) actuarial services; (v) internal audit outsourcing services; (vi) management functions or human resources; (vii) broker or dealer, investment adviser or investment banking services; (viii) legal services and expert services unrelated to the audit; and (ix) any other service the Public Company Accounting Oversight Board determines, by regulation, is impermissible.

Pre-approval by the Committee of any permissible non-audit services is not required so long as: (i) the aggregate amount of all such permissible non-audit services provided to the Fund, the Adviser and the Covered Service Providers constitutes not more than 5% of the total amount of revenues paid to the independent auditors during the fiscal year in which the permissible non-audit services are provided to (a) the Fund, (b) the Adviser and (c) any entity controlling, controlled by or under common control with the Adviser that provides ongoing services to the Fund during the fiscal year in which the services are provided that would have to be approved by the Committee; (ii) the permissible non-audit services were not recognized by the Fund at the time of the engagement to be non-audit services; and (iii) such services are promptly brought to the attention of the Committee and approved by the Committee (or its delegate(s)) prior to the completion of the audit.

(2) None of the services described in paragraphs (b) through (d) of this Item were performed in reliance on paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X.

(f) Not applicable.

(g) Non-audit fees billed by the Auditor for services rendered to the Registrant and the Service Affiliates during the reporting period were $334,889 in December 31, 2024 and $344,935 in December 31, 2025.

h) Yes. The Registrant’s Audit Committee has considered whether the provision of non-audit services that were rendered to Service Affiliates, which were not pre-approved (not requiring pre-approval), is compatible with maintaining the Auditor’s independence. All services provided by the Auditor to the Registrant or to the Service Affiliates, which were required to be pre-approved, were pre-approved as required.

(i) Not applicable.

(j) Not applicable.

ITEM 5.

AUDIT COMMITTEE OF LISTED REGISTRANTS.

a) Registrant has a separately-designated standing Audit Committee established in accordance with Section 3(a)58(A) of the Exchange Act. The Audit Committee consists of the following Board members:

Robert D. Agdern

Carol L. Colman

Anthony Grillo

Eileen A. Kamerick

Nisha Kumar

Peter Mason

Hillary A. Sale

b) Not applicable

ITEM 6.

SCHEDULE OF INVESTMENTS.

(a)

Please see schedule of investments contained in the Financial Statements and Financial Highlights included under Item 1 of this Form N-CSR.

(b)

Not applicable.

ITEM 7.

FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.

ITEM 8.

CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.

ITEM 9.

PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.

ITEM 10.

REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.

ITEM 11.

STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

The information is disclosed as part of the Financial Statements included in Item 1 of this Form N-CSR, as applicable.

ITEM 12.

DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES

Western Asset Management Company, LLC

Proxy Voting Policies and Procedures

NOTE

The policy below relating to proxy voting and corporate actions is a global policy for Western Asset Management Company, LLC (“Western Asset” or the “Firm”) and all Western Asset affiliates, including Western Asset Management Company Limited (“Western Asset Limited”), Western Asset Management Company Ltd (“Western Asset Japan”) and Western Asset Management Company Pte. Ltd. (“Western Asset Singapore”), as applicable. As compliance with the policy is monitored by Western Asset, the policy has been adopted from the US Compliance Manual and all defined terms are those defined in the US Compliance Manual rather than the compliance manual of any other Western Asset affiliate.

BACKGROUND

An investment adviser is required to adopt and implement policies and procedures that we believe are reasonably designed to ensure that proxies are voted in the best interest of clients, in accordance with fiduciary duties and Rule 206(4)-6 under the Investment Advisers Act of 1940 (“Advisers Act”). The authority to vote the proxies of our clients is established through investment management agreements or comparable documents. In addition to SEC requirements governing advisers, long-standing fiduciary standards and responsibilities have been established for ERISA accounts. Unless a manager of ERISA assets has been expressly precluded from voting proxies, the Department of Labor has determined that the responsibility for these votes lies with the investment manager.

POLICY

As a fixed income only manager, the occasion to vote proxies is very rare, for instance, when fixed income securities are converted into equity by their terms or in connection with a bankruptcy or corporate workout. However, the Firm has adopted and implemented policies and procedures that we believe are reasonably designed to ensure that proxies are voted in the best interest of clients, in accordance with our fiduciary duties and Rule 206(4)-6 under the Advisers Act. In addition to SEC requirements governing advisers, our proxy voting policies reflect the long-standing fiduciary standards and responsibilities for ERISA accounts. Unless a manager of ERISA assets has been expressly precluded from voting proxies, the Department of Labor has determined that the responsibility for these votes lies with the investment manager.

While the guidelines included in the procedures are intended to provide a benchmark for voting standards, each vote is ultimately cast on a case-by-case basis, taking into consideration the Firm’s contractual obligations to our clients and all other relevant facts and circumstances at the time of the vote (such that these guidelines may be overridden to the extent the Firm deems appropriate).

In exercising its voting authority, Western Asset will not consult or enter into agreements with officers, directors or employees of Franklin Resources (Franklin Resources includes Franklin Resources, Inc. and organizations operating as Franklin Resources) or any of its affiliates (other than Western Asset affiliated companies) regarding the voting of any securities owned by its clients.

PROCEDURES

Responsibility and Oversight

The Legal & Compliance Group is responsible for administering and overseeing the proxy voting process. The gathering of proxies is coordinated through the Corporate Actions team of the Investment Operations Group (“Corporate Actions”). Research analysts and portfolio managers are responsible for determining appropriate voting positions on each proxy utilizing any applicable guidelines contained in these procedures.

Client Authority

The Investment Management Agreement for each client is reviewed at account start-up for proxy voting instructions. If an agreement is silent on proxy voting, but contains an overall delegation of discretionary authority or if the account represents assets of an ERISA plan, Western Asset will assume responsibility for proxy voting. The Portfolio Compliance Group maintains a matrix of proxy voting authority.

Proxy Gathering

Registered owners of record, client custodians, client banks and trustees (“Proxy Recipients”) that receive proxy materials on behalf of clients should forward them to Corporate Actions. Proxy Recipients for new clients (or, if Western Asset becomes aware that the applicable Proxy Recipient for an existing client has changed, the Proxy Recipient for the existing client) are notified at start-up of appropriate routing to Corporate Actions of proxy materials received and reminded of their responsibility to forward all proxy materials on a timely basis. If Western Asset personnel other than Corporate Actions receive proxy materials, they should promptly forward the materials to Corporate Actions.

Proxy Voting

Once proxy materials are received by Corporate Actions, they are forwarded to the Portfolio Compliance Group for coordination and the following actions:

Proxies are reviewed to determine accounts impacted.

Impacted accounts are checked to confirm Western Asset voting authority.

Where appropriate, the Regulatory Affairs Group reviews the issues presented to determine any material conflicts of interest. (See Conflicts of Interest section of these procedures for further information on determining material conflicts of interest.)

If a material conflict of interest exists, (i) to the extent reasonably practicable and permitted by applicable law, the client is promptly notified, the conflict is disclosed and Western Asset obtains the client’s proxy voting instructions, and (ii) to the extent that it is not reasonably practicable or permitted by applicable law to notify the client and obtain such instructions (e.g., the client is a mutual fund or other commingled vehicle or is an ERISA plan client), Western Asset seeks voting instructions from an independent third party.

The Portfolio Compliance Group provides proxy material to the appropriate research analyst or portfolio manager to obtain their recommended vote. Research analysts and portfolio managers determine votes on a case-by-case basis taking into account the voting guidelines contained in these procedures. For avoidance of doubt, depending on the best interest of each individual client, Western Asset may vote the same proxy differently for different clients. The analyst’s or portfolio manager’s basis for their decision is documented and maintained by the Portfolio Compliance Group.

Portfolio Compliance Group votes the proxy pursuant to the instructions received in (d) or (e) and returns the voted proxy as indicated in the proxy materials.

Timing

Western Asset’s Legal and Compliance Department personnel act in such a manner to ensure that, absent special circumstances, the proxy gathering and proxy voting steps noted above can be completed before the applicable deadline for returning proxy votes.

Recordkeeping

Western Asset maintains records of proxies voted pursuant to Rule 204-2 of the Advisers Act and ERISA DOL Bulletin 94-2. These records include:

	•	A copy of Western Asset’s proxy voting policies and procedures.

	•	Copies of proxy statements received with respect to securities in client accounts.

	•	A copy of any document created by Western Asset that was material to making a decision how to vote proxies.

	•	Each written client request for proxy voting records and Western Asset’s written response to both verbal and written client requests.

A proxy log including:

Issuer name;

Exchange ticker symbol of the issuer’s shares to be voted;

Committee on Uniform Securities Identification Procedures (“CUSIP”) number for the shares to be voted;

A brief identification of the matter voted on;

Whether the matter was proposed by the issuer or by a shareholder of the issuer;

Whether a vote was cast on the matter;

A record of how the vote was cast;

Whether the vote was cast for or against the recommendation of the issuer’s management team;

Funds are required to categorize their votes so that investors can focus on the topics they find important. Categories include, for example, votes related to director elections, extraordinary transactions, say-on-pay, shareholder rights and defenses, and the environment or climate, among others; and

10.

Funds are required to disclose the number of shares voted or instructed to be cast, as well as the number of shares loaned but not recalled and, therefore, not voted by the fund.

Records are maintained in an easily accessible place for a period of not less than five (5) years with the first two (2) years in Western Asset’s offices.

Disclosure

Western Asset’s proxy policies and procedures are described in the Firm’s Form ADV Part 2A. Clients are provided with a copy of these policies and procedures upon request. In addition, clients may receive reports on how their proxies have been voted, upon request.

Conflicts of Interest

All proxies that potentially present conflicts of interest are reviewed by the Regulatory Affairs Group for a materiality assessment. Issues to be reviewed include, but are not limited to:

	1.	Whether Western Asset (or, to the extent required to be considered by applicable law, its affiliates) manages assets for the company or an employee group of the company or otherwise has an interest in the company;

Whether Western Asset or an officer or director of Western Asset or the applicable portfolio manager or analyst responsible for recommending the proxy vote (together, “Voting Persons”) is a close relative of or has a personal or business relationship with an executive, director or person who is a candidate for director of the company or is a participant in a proxy contest; and

Whether there is any other business or personal relationship where a Voting Person has a personal interest in the outcome of the matter before shareholders.

Voting Guidelines

Western Asset’s substantive voting decisions are based on the particular facts and circumstances of each proxy vote and are evaluated by the designated research analyst or portfolio manager. The examples outlined below are meant as guidelines to aid in the decision making process.

Situations can arise in which more than one Western Asset client invests in instruments of the same issuer or in which a single client may invest in instruments of the same issuer but in multiple accounts or strategies. Multiple clients or the same client in multiple accounts or strategies may have different investment objectives, investment styles, or investment professionals involved in making decisions. While there may be differences, votes are always cast in the best interests of the client and the investment objectives agreed with Western Asset. As a result, there may be circumstances where Western Asset casts different votes on behalf of different clients or on behalf of the same client with multiple accounts or strategies.

Guidelines are grouped according to the types of proposals generally presented to shareholders. Part I deals with proposals which have been approved and are recommended by a company’s board of directors; Part II deals with proposals submitted by shareholders for inclusion in proxy statements; Part III addresses issues relating to voting shares of investment companies; and Part IV addresses unique considerations pertaining to foreign issuers.

Board Approved Proposals

The vast majority of matters presented to shareholders for a vote involve proposals made by a company itself that have been approved and recommended by its board of directors. In view of the enhanced corporate governance practices currently being implemented in public companies, Western Asset generally votes in support of decisions reached by independent boards of directors. More specific guidelines related to certain board-approved proposals are as follows:

Matters relating to the Board of Directors

Western Asset votes proxies for the election of the company’s nominees for directors and for board-approved proposals on other matters relating to the board of directors with the following exceptions:

Votes are withheld for the entire board of directors if the board does not have a majority of independent directors or the board does not have nominating, audit and compensation committees composed solely of independent directors.

Votes are withheld for any nominee for director who is considered an independent director by the company and who has received compensation from the company other than for service as a director.

Votes are withheld for any nominee for director who attends less than 75% of board and committee meetings without valid reasons for absences.

Votes are cast on a case-by-case basis in contested elections of directors.

Matters relating to Executive Compensation

Western Asset generally favors compensation programs that relate executive compensation to a company’s long-term performance. Votes are cast on a case-by-case basis on board-approved proposals relating to executive compensation, except as follows:

Except where the firm is otherwise withholding votes for the entire board of directors, Western Asset votes for stock option plans that will result in a minimal annual dilution.

Western Asset votes against stock option plans or proposals that permit replacing or repricing of underwater options.

Western Asset votes against stock option plans that permit issuance of options with an exercise price below the stock’s current market price.

Except where the firm is otherwise withholding votes for the entire board of directors, Western Asset votes for employee stock purchase plans that limit the discount for shares purchased under the plan to no more than 15% of their market value, have an offering period of 27 months or less and result in dilution of 10% or less.

Matters relating to Capitalization

The Management of a company’s capital structure involves a number of important issues, including cash flows, financing needs and market conditions that are unique to the circumstances of each company. As a result, Western Asset votes on a case-by-case basis on board-approved proposals involving changes to a company’s capitalization except where Western Asset is otherwise withholding votes for the entire board of directors.

Western Asset votes for proposals relating to the authorization of additional common stock.

Western Asset votes for proposals to effect stock splits (excluding reverse stock splits).

Western Asset votes for proposals authorizing share repurchase programs.

Matters relating to Acquisitions, Mergers, Reorganizations and Other Transactions

Western Asset votes these issues on a case-by-case basis on board-approved transactions.

Matters relating to Anti-Takeover Measures

Western Asset votes against board-approved proposals to adopt anti-takeover measures except as follows:

Western Asset votes on a case-by-case basis on proposals to ratify or approve shareholder rights plans.

Western Asset votes on a case-by-case basis on proposals to adopt fair price provisions.

Other Business Matters

Western Asset votes for board-approved proposals approving such routine business matters such as changing the company’s name, ratifying the appointment of auditors and procedural matters relating to the shareholder meeting.

Western Asset votes on a case-by-case basis on proposals to amend a company’s charter or bylaws.

Western Asset votes against authorization to transact other unidentified, substantive business at the meeting.

Reporting of Financially Material Information

Western Asset generally believes issuers should disclose information that is material to their business. What qualifies as “material” can vary, so votes are cast on a case-by-case basis but consistent with the overarching principle.

II.

Shareholder Proposals

SEC regulations permit shareholders to submit proposals for inclusion in a company’s proxy statement. These proposals generally seek to change some aspect of a company’s corporate governance structure or to change some aspect of its business operations. Western Asset votes in accordance with the recommendation of the company’s board of directors on all shareholder proposals, except as follows:

Western Asset votes for shareholder proposals to require shareholder approval of shareholder rights plans.

Western Asset votes for shareholder proposals that are consistent with Western Asset’s proxy voting guidelines for board-approved proposals.

Western Asset votes on a case-by-case basis on other shareholder proposals where the firm is otherwise withholding votes for the entire board of directors.

Environmental or social issues that are the subject of a proxy vote will be considered on a case-by-case basis. Constructive proposals that seek to advance the health of the issuer and the prospect for risk-adjusted returns to Western Assets clients are viewed more favorably than proposals that advance a single issue or limit the ability of management to meet its operating objectives.

III.

Voting Shares of Investment Companies

Western Asset may utilize shares of open or closed-end investment companies to implement its investment strategies. Shareholder votes for investment companies that fall within the categories listed in Parts I and II above are voted in accordance with those guidelines.

Western Asset votes on a case-by-case basis on proposals relating to changes in the investment objectives of an investment company taking into account the original intent of the fund and the role the fund plays in the clients’ portfolios.

Western Asset votes on a case-by-case basis all proposals that would result in increases in expenses (e.g., proposals to adopt 12b-1 plans, alter investment advisory arrangements or approve fund mergers) taking into account comparable expenses for similar funds and the services to be provided.

IV.

Voting Shares of Foreign Issuers

In the event Western Asset is required to vote on securities held in non-U.S. issuers – i.e. issuers that are incorporated under the laws of a foreign jurisdiction and that are not listed on a U.S. securities exchange or the NASDAQ stock market, the following guidelines are used, which are premised on the existence of a sound corporate governance and disclosure framework. These guidelines, however, may not be appropriate under some circumstances for foreign issuers and therefore apply only where applicable.

Western Asset votes for shareholder proposals calling for a majority of the directors to be independent of management.

Western Asset votes for shareholder proposals seeking to increase the independence of board nominating, audit and compensation committees.

Western Asset votes for shareholder proposals that implement corporate governance standards similar to those established under U.S. federal law and the listing requirements of U.S. stock exchanges, and that do not otherwise violate the laws of the jurisdiction under which the company is incorporated.

Western Asset votes on a case-by-case basis on proposals relating to (1) the issuance of common stock in excess of 20% of a company’s outstanding common stock where shareholders do not have preemptive rights, or (2) the issuance of common stock in excess of 100% of a company’s outstanding common stock where shareholders have preemptive rights.

Environmental, Social and Governance (“ESG”) Matters

Western Asset incorporates ESG considerations, among other relevant risks, as part of the overall process where appropriate. The Firm seeks to identify and consider material risks to the investment thesis, including material risks presented by ESG factors. While Western Asset is primarily a fixed income manager, opportunities to vote proxies are considered on the investment merits of the instruments and strategies involved.

As a general proposition, Western Asset votes to encourage disclosure of information material to their business. This principle extends to ESG matters. What qualifies as “material” can vary, so votes are cast on a case-by-case basis but consistent with the overarching principle. Western Asset recognizes that objective standards and criteria may not be available or universally agreed and that there may be different views and subjective analysis regarding factors and their significance.

Targeted environmental or social issues that are the subject of a proxy vote will be considered on a case-by-case basis. Constructive proposals that seek to advance the health of the issuer and the prospect for risk-adjusted returns to Western Assets clients are viewed more favorably than proposals that advance a single issue or limit the ability of management to meet its operating objectives.

Retirement Accounts

For accounts subject to ERISA, as well as other retirement accounts, Western Asset is presumed to have the responsibility to vote proxies for the client. The Department of Labor has issued a bulletin that states that investment managers have the responsibility to vote proxies on behalf of Retirement Accounts unless the authority to vote proxies has been specifically reserved to another named fiduciary. Furthermore, unless Western Asset is expressly precluded from voting the proxies, the Department of Labor has determined that the responsibility remains with the investment manager.

In order to comply with the Department of Labor’s position, Western Asset will be presumed to have the obligation to vote proxies for its retirement accounts unless Western Asset has obtained a specific written instruction indicating that: (a) the right to vote proxies has been reserved to a named fiduciary of the client, and (b) Western Asset is precluded from voting proxies on behalf of the client. If Western Asset does not receive such an instruction, Western Asset will be responsible for voting proxies in the best interests of the retirement account client and in accordance with any proxy voting guidelines provided by the client.

ITEM 13.

PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

(a)(1): As of the date of filing this report:

NAME AND ADDRESS	LENGTH OF TIME SERVED	PRINCIPAL OCCUPATION(S) DURING PAST 5 YEARS

Michael C. Buchanan Western Asset 385 East Colorado Blvd. Pasadena, CA 91101	Since 2024	Co-portfolio manager of the fund; Responsible for the day-to-day management with other members of the Fund’s portfolio management team; Chief Investment Officer of Western Asset (Since 2024); Co-Chief Investment Officer of Western Asset (2023-2024); employed by Western Asset Management as an investment professional for at least the past five years

Christopher Kilpatrick Western Asset 385 East Colorado Blvd. Pasadena, CA 91101	Since 2025	Co-portfolio manager of the fund; Responsible for the day-to-day management with other members of the Fund’s portfolio management team; employed by Western Asset Management as an investment professional for at least the past five years.

Rafael Zielonka Western Asset 385 East Colorado Blvd. Pasadena, CA 91101	Since 2025	Co-portfolio manager of the fund; Responsible for the day-to-day management with other members of the Fund’s portfolio management team; employed by Western Asset Management as an investment professional since 2002.

Prashant Chandran Western Asset 385 East Colorado Blvd. Pasadena, CA 91101	Since 2025	Co-portfolio manager of the fund Responsible for the day-to-day management with other members of the Fund’s portfolio management team; employed by Western Asset Management as an investment professional since 2007.

(a)(2): DATA TO BE PROVIDED BY FINANCIAL CONTROL

The following tables set forth certain additional information with respect to the fund’s investment professionals for the fund. Unless noted otherwise, all information is provided as of December 31, 2025.

Other Accounts Managed by Investment Professionals

The table below identifies the number of accounts (other than the fund) for which the fund’s investment professionals have day-to-day management responsibilities and the total assets in such accounts, within each of the following categories: registered investment companies, other pooled investment vehicles, and other accounts. For each category, the number of accounts and total assets in the accounts where fees are based on performance is also indicated.

Name of PM	Type of Account	Number of Accounts Managed	Total Assets Managed	Number of Accounts Managed for which Advisory Fee is Performance-Based	Assets Managed for which Advisory Fee is Performance-Based
Michael C. Buchanan‡	Other Registered Investment Companies	61	$82.65 billion	None	None
	Other Pooled Vehicles	189	$47.17 billion	16	$3.01 billion
	Other Accounts	273	$79.61 billion	11	$6.20 billion
Christopher Kilpatrick‡	Other Registered Investment Companies	11	$3.84 billion	None	None
	Other Pooled Vehicles	7	$546 million	3	$389 million
	Other Accounts	13	$820 million	None	None
Rafael Zielonka‡	Other Registered Investment Companies	4	$3.35 billion	None	None
	Other Pooled Vehicles	6	$1.61 billion	None	None
	Other Accounts	4	$692 million	None	None
Prashant Chandran‡	Other Registered Investment Companies	None	None	None	None
	Other Pooled Vehicles	2	$68 million	None	None
	Other Accounts	12	$527 million	None	None

‡ The numbers above reflect the overall number of portfolios managed by employees of Western Asset Management Company (“Western Asset”). They are involved in the management of all the Firm’s portfolios, but they are not solely responsible for particular portfolios. Western Asset’s investment discipline emphasizes a team approach that combines the efforts of groups of specialists working in different market sectors. They are responsible for overseeing implementation of Western Asset’s overall investment ideas and coordinating the work of the various sector teams. This structure ensures that client portfolios benefit from a consensus that draws on the expertise of all team members.

(a)(3): Portfolio Manager Compensation (As of December 31, 2025)

Investment Professional Compensation

Conflicts of Interest

The Subadviser has adopted compliance policies and procedures to address a wide range of potential conflicts of interest that could directly impact client portfolios. For example, potential conflicts of interest may arise in connection with the management of multiple portfolios (including portfolios managed in a personal capacity). These could include potential conflicts of interest related to the knowledge and timing of a portfolio’s trades, investment opportunities and broker selection. Portfolio managers are privy to the size, timing, and possible market impact of a portfolio’s trades.

It is possible that an investment opportunity may be suitable for both a portfolio and other accounts managed by a portfolio manager, but may not be available in sufficient quantities for both the portfolio and the other accounts to participate fully. Similarly, there may be limited opportunity to sell an investment held by a portfolio and another account. A conflict may arise where the portfolio manager may have an incentive to treat an account preferentially as compared to a portfolio because the account pays a performance-based fee or the portfolio manager, the Subadviser or an affiliate has an interest in the account. The Subadviser has adopted procedures for allocation of portfolio transactions and investment opportunities across multiple client accounts on a fair and equitable basis over time. Eligible accounts that can participate in a trade generally share the same price on a pro-rata allocation basis, taking into account differences based on factors such as cash availability, investment restrictions and guidelines, and portfolio composition versus strategy.

With respect to securities transactions, the Subadviser determines which broker or dealer to use to execute each order, consistent with their duty to seek best execution of the transaction. However, with respect to certain other accounts (such as pooled investment vehicles that are not registered investment companies and other accounts managed for organizations and individuals), the Subadviser may be limited by the client with respect to the selection of brokers or dealers or may be instructed to direct trades through a particular broker or dealer. In these cases, trades for a portfolio in a particular security may be placed separately from, rather than aggregated with, such other accounts. Having separate transactions with respect to a security may temporarily affect the market price of the security or the execution of the transaction, or both, to the possible detriment of a portfolio or the other account(s) involved. Additionally, the management of multiple portfolios and/or other accounts may result in a portfolio manager devoting unequal time and attention to the management of each portfolio and/or other account. The Subadviser’s team approach to portfolio management and block trading approach seeks to limit this potential risk.

The Subadviser also maintains a gift and entertainment policy to address the potential for a business contact to give gifts or host entertainment events that may influence the business judgment of an employee. Employees are permitted to retain gifts of only a nominal value and are required to make reimbursement for entertainment events above a certain value. All gifts (except those of a de minimis value) and entertainment events that are given or sponsored by a business contact are required to be reported in a gift and entertainment log which is reviewed on a regular basis for possible issues.

Employees of the Subadviser have access to transactions and holdings information regarding client accounts and the Subadviser’s overall trading activities. This information represents a potential conflict of interest because employees may take advantage of this information as they trade in their personal accounts. Accordingly, the Subadviser maintains a Code of Ethics that is compliant with Rule 17j-1 under the 1940 Act and Rule 204A-1 under the Advisers Act to address personal trading. In addition, the Code of Ethics seeks to establish broader principles of good conduct and fiduciary responsibility in all aspects of the Subadviser’s business. The Code of Ethics is administered by the Legal and Compliance Department and monitored through the Subadviser’s compliance monitoring program.

The Subadviser may also face other potential conflicts of interest with respect to managing client assets, and the description above is not a complete description of every conflict of interest that could be deemed to exist. The Subadviser also maintains a compliance monitoring program and engages independent auditors to conduct a SOC1/ISAE 3402 audit on an annual basis. These steps help to ensure that potential conflicts of interest have been addressed.

Investment Professional Compensation

With respect to the compensation of the Fund’s investment professionals, the Subadviser’s compensation system assigns each employee a total compensation range, which is derived from annual market surveys that benchmark each role with its job function and peer universe. This method is designed to reward employees with total compensation reflective of the external market value of their skills, experience and ability to produce desired results. Standard compensation includes competitive base salaries, generous employee benefits and a retirement plan.

In addition, the Subadviser’s employees are eligible for bonuses. These are structured to closely align the interests of employees with those of the Subadviser, and are determined by the professional’s job function and pre-tax performance as measured by a formal review process. All bonuses are completely discretionary. The principal factor considered is an investment professional’s investment performance versus appropriate peer groups and benchmarks (e.g., a securities index and with respect to the Fund, the benchmark set forth in the Fund’s Prospectus to which the Fund’s average annual total returns are compared or, if none, the benchmark set forth in the Fund’s annual report). Performance is reviewed on a 1, 3 and 5 year basis for compensation—with 3 and 5 years having a larger emphasis. The Subadviser may also measure an investment professional’s pre-tax investment performance against other benchmarks, as it determines appropriate. Because investment professionals are generally responsible for multiple accounts (including the Fund) with similar investment strategies, they are generally compensated on the performance of the aggregate group of similar accounts, rather than a specific account. Other factors that may be considered when making bonus decisions include client service, business development, length of service to the Subadviser, management or supervisory responsibilities, contributions to developing business strategy and overall contributions to the Subadviser’s business.

Finally, in order to attract and retain top talent, all investment professionals are eligible for additional incentives in recognition of outstanding performance. These are determined based upon the factors described above and include long-term incentives that vest over a set period of time past the award date.

Investment Professional Securities Ownership

The table below identifies the dollar range of securities beneficially owned by the named investment professional as of December 31, 2025.


Investment Professional(s)		Dollar Range of Portfolio Securities Beneficially Owned
Michael C. Buchanan		A
Christopher Kilpatrick		G
Rafael Zielonka		A
Prashant Chandran		A

Dollar Range ownership is as follows:
A: none
B: $1 - $10,000
C: 10,001 - $50,000
D: $50,001 - $100,000
E: $100,001 - $500,000
F: $500,001 - $1 million
G: over $1 million

ITEM 14.

PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS

Not applicable.

ITEM 15.

SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

There have been no changes to the procedures by which shareholders may recommend nominees to the Registrant’s Board of Trustees that would require disclosure herein.

ITEM 16.

CONTROLS AND PROCEDURES.

(a)

The registrant’s principal executive officer and principal financial officer have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a- 3(c) under the Investment Company Act of 1940, as amended (the “1940 Act”)) are effective as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the disclosure controls and procedures required by Rule 30a-3(b) under the 1940 Act and 15d-15(b) under the Securities Exchange Act of 1934.

(b)

There were no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the period covered by this report that have materially affected, or are likely to materially affect the registrant’s internal control over financial reporting.

ITEM 17.

DISCLOSURE OF SECURITIES LENDING ACTIVITIES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable.

ITEM 18.

RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION.

(a)

Not applicable.

(b)

Not applicable.

(c)

ITEM 19.

EXHIBITS.

(a) (1) Code of Ethics attached hereto.

Exhibit 99.CODE ETH

(a) (3) Certifications pursuant to section 302 of the Sarbanes-Oxley Act of 2002 attached hereto.

Exhibit 99.CERT

(b) Certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 attached hereto.

Exhibit 99.906CERT

Ex99_CONSENT

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this Report to be signed on its behalf by the undersigned, there unto duly authorized.

Western Asset Mortgage Opportunity Fund Inc.:

By:	/s/ Jane Trust
	Jane Trust
	Chief Executive Officer

Date:	February 27, 2026

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:	/s/ Jane Trust
	Jane Trust
	Chief Executive Officer

Date:	February 27, 2026

By:	/s/ Christopher Berarducci
	Christopher Berarducci
	Principal Financial Officer

Date:	February 27, 2026

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Source: View Original Filing on SEC EDGAR

FAQ

What was DMO's NAV and market total return for 2025?

The Fund returned 10.57% based on NAV and 6.85% based on market price for the twelve months ended December 31, 2025. These figures assume reinvestment of distributions as described in the report.

How much did DMO distribute to shareholders in 2025 and what portion was return of capital?

DMO made total distributions of $1.55 per share during the fiscal year ended December 31, 2025, of which $0.38 per share is characterized as a return of capital for tax purposes.

What are DMO's largest portfolio exposures as of December 31, 2025?

The schedule shows Residential MBS at 112.7% and Commercial MBS at 49.3% of total investments (percentages shown based on Fund net assets). The Fund also holds asset-backed securities, CLOs, preferreds and corporate debt.

Does DMO use leverage or derivatives and how significant are those positions?

Yes. Leverage ranged from roughly 45% to 48% of total assets during the period. The Fund records significant reverse repurchase agreements totaling $123,196,000 and reports open futures contracts and CDS activity in the notes and schedule.

Which holdings contributed and detracted from DMO's 2025 performance?

Contributors included investment-grade non-agency RMBS, legacy and new-issue RMBS, CRTs, new-issue CMBS and ABS. Detractors included issue selection within high-yield REITs, and aggregate use of derivatives reduced performance.

Western Asset Mortgage Opportunity Fund (NYSE: DMO) posts 10.6% NAV return in 2025

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FAQ

What was DMO's NAV and market total return for 2025?

How much did DMO distribute to shareholders in 2025 and what portion was return of capital?

What are DMO's largest portfolio exposures as of December 31, 2025?

Does DMO use leverage or derivatives and how significant are those positions?

Which holdings contributed and detracted from DMO's 2025 performance?

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Western Asset Mortgage Opportunity Fund (NYSE: DMO) posts 10.6% NAV return in 2025

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Risk & Credit Analyst neutral

FAQ

What was DMO's NAV and market total return for 2025?

How much did DMO distribute to shareholders in 2025 and what portion was return of capital?

What are DMO's largest portfolio exposures as of December 31, 2025?

Does DMO use leverage or derivatives and how significant are those positions?

Which holdings contributed and detracted from DMO's 2025 performance?

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