Invesco discloses 5.2% Monolithic Power Systems (MPWR) ownership stake

Rhea-AI Filing Summary

Invesco Ltd. reported beneficial ownership of 2,510,980 shares of Monolithic Power Systems, Inc. common stock as of 12/31/2025, representing 5.2% of the outstanding class. The shares are held of record by clients of investment advisers that are subsidiaries of Invesco Ltd.

Invesco has sole power to vote or direct the vote of 2,491,947 shares and sole power to dispose or direct the disposition of 2,510,980 shares, with no shared voting or dispositive power. No single client has more than 5% economic ownership of these securities, and those clients are entitled to dividends and sale proceeds.

Invesco reports in its capacity as a parent holding company, with relevant subsidiaries including Invesco Advisers, Inc., Invesco Investment Advisers LLC, Invesco Capital Management LLC, Invesco Asset Management (Japan) Limited, and Invesco Management S.A. The report is signed by the Global Head of Compliance on 07/15/2026.

Key Figures

Beneficial Ownership: 2,510,980 shares Percent of Class: 5.2% Sole Voting Power: 2,491,947 shares +3 more

6 metrics

Beneficial Ownership 2,510,980 shares Shares of Monolithic Power Systems, Inc. common stock beneficially owned by Invesco Ltd.

Percent of Class 5.2% Portion of Monolithic Power Systems, Inc. common stock class represented by Invesco Ltd.'s beneficial ownership

Sole Voting Power 2,491,947 shares Shares for which Invesco Ltd. has sole power to vote or direct the vote

Sole Dispositive Power 2,510,980 shares Shares for which Invesco Ltd. has sole power to dispose or direct the disposition

Reporting Date 12/31/2025 Date as of which the ownership information relates

Signature Date 07/15/2026 Date the report was signed by the Global Head of Compliance

Key Terms

beneficially own, Sole Voting Power, Sole Dispositive Power, parent holding company, +1 more

5 terms

beneficially own financial

"may be deemed to beneficially own 2,510,980 shares of the Issuer"

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

Sole Voting Power financial

"Sole Voting Power 2,491,947.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Sole Dispositive Power financial

"Sole Dispositive Power 2,510,980.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

parent holding company regulatory

"Invesco Ltd., in its capacity as a parent holding company"

Investment Company Act of 1940 regulatory

"shareholders of an investment company registered under the Investment Company Act of 1940"

A U.S. federal law that sets the rulebook for pooled investment vehicles such as mutual funds, exchange-traded funds and similar money managers, requiring them to register with regulators, disclose holdings and fees, limit conflicts of interest, and follow governance standards. It matters to investors because these protections and transparency rules act like a referee and scoreboard, helping people compare funds, trust that managers follow fair practices, and spot hidden costs or risks.

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Available on EDGAR 07/15/2026 - 03:53 PM Accepted by SEC EDGAR 07/15/2026 - 03:52 PM Learn about SEC filing dates

FAQ

What stake does Invesco Ltd. report in Monolithic Power Systems (MPWR)?

Invesco Ltd. reports beneficial ownership of 2,510,980 shares of Monolithic Power Systems, Inc. common stock, representing 5.2% of the outstanding class. These shares are held of record by clients of Invesco’s subsidiary investment advisers rather than directly by Invesco.

How many MPWR shares can Invesco vote and dispose of under this Schedule 13G?

Invesco has sole voting power over 2,491,947 shares and sole dispositive power over 2,510,980 shares of Monolithic Power Systems common stock. It reports no shared voting power and no shared dispositive power over any MPWR shares in this ownership report.

Who ultimately benefits from Invesco’s 5.2% ownership in MPWR?

The clients of Invesco Ltd., as holders of record, have the right to receive dividends and proceeds from any sale of the reported shares. No single client has greater than 5% economic ownership in the securities included in this 5.2% beneficial ownership position.

Which Invesco subsidiaries are tied to the reported MPWR holdings?

The ownership is reported by Invesco Ltd. as a parent holding company for several investment advisers, including Invesco Advisers, Inc., Invesco Investment Advisers LLC, Invesco Capital Management LLC, Invesco Asset Management (Japan) Limited, and Invesco Management S.A., which manage client accounts holding MPWR.

What dates apply to Invesco’s MPWR ownership information?

The beneficial ownership information relates to 12/31/2025, reflecting Invesco’s position in MPWR at that time. The report is signed by Invesco’s Global Head of Compliance, Robert R. Leveille, on 07/15/2026, formally confirming the disclosed ownership details.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

MONOLITHIC POWER SYSTEMS INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

609839105

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 609839105

1

Names of Reporting Persons

Invesco Ltd.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

BERMUDA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 2,491,947.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 2,510,980.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,510,980.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.2 %

12

Type of Reporting Person (See Instructions)

IA, HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: MONOLITHIC POWER SYSTEMS INC
(b)	Address of issuer's principal executive offices: 5808 Lake Washington blvd.NE, Kirkland, WA, Washington, United States, 98033
Item 2.
(a)	Name of person filing: Invesco Ltd. ("Invesco Ltd.")
(b)	Address or principal business office or, if none, residence: 1331 Spring Street NW, Suite 2500, Atlanta, GA 30309
(c)	Citizenship: Bermuda
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 609839105
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: Invesco Ltd., in its capacity as a parent holding company to its subsidiary investment advisers, may be deemed to beneficially own 2,510,980 shares of the Issuer which are held of record by clients of Invesco Ltd.
(b)	Percent of class: 5.2%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 2,491,947
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 2,510,980
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. No one person has greater than 5% economic ownership in the securities listed above. As holders of record, the relevant clients of Invesco Ltd. have the right to receive or the power to direct the receipt of dividends from, and proceeds from the sale of, the securities listed above.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. Invesco Advisers, Inc. Invesco Investment Advisers LLC Invesco Capital Management LLC Invesco Asset Management (Japan) Limited Invesco Management S.A.
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. Not Applicable.
Item 9.	Notice of Dissolution of Group.
	Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5. Not Applicable.

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Invesco Ltd.

Signature:	Robert R. Leveille
Name/Title:	Robert R. Leveille/Global Head of Compliance
Date:	07/15/2026