Duff & Phelps Utility and Infrastructure Fund Inc. Discloses Sources of Distribution – Section 19(a) Notice

Key Terms

managed distribution plan financial

A managed distribution plan is a company’s program to pay regular, predictable cash amounts to shareholders by setting a fixed schedule and target payout, often funded from operating cash, reserves, or return of capital. Think of it like a household budget that guarantees a monthly allowance: it provides steady income for investors but can mask when distributions exceed sustainable earnings, which may reduce the company’s capital over time and affect long‑term value.

net investment income financial

Net investment income is the money an investor or fund actually keeps from its investments after subtracting the costs of running those investments (like management fees, interest, and losses). Think of it as your paycheck from owning assets: gross returns minus the bills needed to earn them. Investors watch it because it shows how profitable the investment activities are, influences dividend payouts and cash available for growth, and helps compare true performance across funds or companies.

net realized short-term capital gains financial

Gains from selling investments held one year or less, after subtracting any short-term losses, so it represents the net profit from quick trades. Investors care because these gains are taxed at ordinary income rates rather than the lower long-term rates, which can significantly reduce after-tax returns; think of it like the higher sales tax you pay on a quick flip versus a discounted rate for holding something longer.

net realized long-term capital gains financial

Net realized long-term capital gains are the total profit an investor actually locks in from selling assets held more than one year, after subtracting any losses or adjustments. Think of it like the net cash you keep after selling a long-owned item and paying off related losses or costs; it matters because these gains determine taxable income and after-tax investment returns, influence dividend capacity and tax planning, and usually face lower tax rates than short-term gains.

return of capital financial

Return of capital is when an investor receives money from their investment that is not considered profit or earnings but rather a portion of the original amount they invested. It’s similar to getting back part of your initial savings rather than gains from it. This matters because it can affect how much money an investor still has in the investment and may have tax implications.

net asset value financial

Net asset value is the total value of an investment fund's assets minus any liabilities, divided by the number of shares or units outstanding. It represents the per-share worth of the fund, similar to how the value of a house is determined by its total worth after debts are subtracted. Investors use it to gauge the true value of their holdings and to compare different investment options.

Form 1099-DIV regulatory

Form 1099-DIV is a U.S. tax document brokers, mutual funds and other financial institutions send to investors showing dividends and other distributions paid during the year. Investors use it like an annual receipt to report taxable income — including regular dividends, dividends that may qualify for lower tax rates, and capital gains distributions — so it directly affects tax liability and helps reconcile brokerage records with a tax return.

CHICAGO--(BUSINESS WIRE)-- The Board of Directors of Duff & Phelps Utility and Infrastructure Fund Inc. (NYSE: DPG), a closed-end fund advised by Duff & Phelps Investment Management Co., previously announced the following monthly distribution on September 18, 2025:

Per Share Amount	Ex-Date	Record Date	Payable Date
$0.07	December 31, 2025	December 31, 2025	January 12, 2026

The Fund adopted a managed distribution plan (the “Plan”) in 2015. Under the Plan, the Fund will distribute all available investment income to its shareholders, consistent with the Fund’s investment objective. If and when sufficient investment income is not available on a monthly basis, the Fund will distribute realized capital gains and/or return of capital to its shareholders in order to maintain the monthly $0.07 per share distribution level.

The following table sets forth the estimated amounts of the Fund’s December 2025 distribution to shareholders, together with the cumulative distributions paid from the first day of the fiscal year to this month end, and provides the sources of such distributions. All amounts are expressed per share of common stock based on U.S. generally accepted accounting principles which may differ from federal income tax regulations.

Distribution Estimates	December 2025 (MTD)			Fiscal Year-to-Date (YTD)(1)
(Sources)	Per Share Amount		Percentage of Current Distribution	Per Share Amount		Percentage of Current Distribution
Net Investment Income	$	0.000	0.0%	$	0.023	16.5%
Net Realized Short-Term Capital Gains		0.000	0.0%		0.000	0.0%
Net Realized Long-Term Capital Gains		0.070	100.0%		0.117	83.5%
Return of Capital (or other Capital Source)		0.000	0.0%		0.000	0.0%
Total Distribution	$	0.070	100.0%	$	0.140	100.0%
(1) Fiscal year started November 1, 2025.

As of November 28, 2025
Average annual total return on NAV for the 5 years	11.95%
Annualized current distribution rate as a percentage of NAV	5.68%
Cumulative total return on NAV for the fiscal year	4.16%
Cumulative fiscal year distributions as a percentage of NAV	0.47%

The Fund will issue a separate 19(a) notice at the time of each distribution using the most current financial information available. You should not draw any conclusions about the Fund’s investment performance from the amount of these distributions or from the terms of the Plan.

The amounts and sources of distributions reported in this notice are only estimates and are not being provided for tax reporting purposes. The actual amounts and sources of the amounts for tax reporting purposes will depend upon the Fund’s investment experience during the remainder of the fiscal year and may be subject to changes based on tax regulations. The Fund or your broker will send you a Form 1099-DIV for the calendar year that will tell you how to report these distributions for federal income tax purposes.

About the Fund

Duff & Phelps Utility and Infrastructure Fund Inc. is a closed-end investment management company whose investment objective is to seek total return, resulting primarily from (i) a high level of current income, with an emphasis on providing tax-advantaged dividend income and (ii) growth in current income, and secondarily from capital appreciation. The Fund seeks to achieve these objectives by investing primarily in equities of domestic and foreign utilities and infrastructure providers. Under normal market conditions, the Fund will invest at least 80% of its total assets in dividend-paying equity securities of companies in the utility industry and the infrastructure industry. The utility industry is defined to include the following sectors: electric, gas, water, telecommunications, and midstream energy. The infrastructure industry is defined as companies owning or operating essential transportation assets, such as toll roads, bridges, tunnels, airports, seaports, and railroads. For more information, contact shareholder services at (866) 270-7598, by email at duff@virtus.com, or visit the DPG website, dpimc.com/dpg.

About the Investment Adviser

Duff & Phelps Investment Management Co. is a boutique investment manager that specializes in listed real asset strategies for institutional and individual clients. An investment manager of Virtus Investment Partners, Inc. (NYSE: VRTS), the firm began in 1932 as a fundamental research firm and has been managing assets since 1979. The firm seeks to provide specialty investment strategies that enhance client outcomes through active portfolio management and customized solutions, utilizing a process with values that include quality, reliability, and specialization. Investment strategies include U.S. and global real estate securities, global listed infrastructure, energy infrastructure, water, and clean energy. For more information visit dpimc.com.

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Shareholder Services

(866) 270-7598

duff@virtus.com

Source: Duff & Phelps Utility and Infrastructure Fund