MONOLITHIC POWER SYSTEMS INC

For the period ended Dec 31, 2025. Filed Feb 27, 2026.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Feb 27, 2026

MPWR$1,357.60-2.2%Stored close · as of Nov 10, 2026

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Contents

Item 15. Exhibits and Financial Statement Schedules

Item 15.	Exhibits and Financial Statement Schedules

(a) Documents filed as part of this report

(1) All financial statements

	Page
Reports of Independent Registered Public Accounting Firm (PCAOB ID: 42)	42
Consolidated Balance Sheets	44
Consolidated Statements of Operations	45
Consolidated Statements of Comprehensive Income	46
Consolidated Statements of Stockholders’ Equity	47
Consolidated Statements of Cash Flows	48
Notes to Consolidated Financial Statements	49

(2) Financial Statement Schedules

All schedules have been omitted because they are not required, not applicable, or the information required is otherwise included in the consolidated financial statements or notes thereto.

(3) Exhibits

Exhibit Number	Description
3.1 (1)	Amended and Restated Certificate of Incorporation of Monolithic Power Systems, Inc., effective June 12, 2025.
3.1 (2)	Amended and Restated Bylaws of Monolithic Power Systems, Inc., effective November 19, 2025.
4.1 (3)	Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934.
10.1+(4)	Registrant’s 2004 Employee Stock Purchase Plan and form of subscription agreement.
10.2+(5)	Form of Directors’ and Officers’ Indemnification Agreement.
10.3+(6)	Employment Agreement with Michael Hsing, and Amendment thereof.
10.4+(7)	Employment Agreement with Maurice Sciammas, and Amendment thereof.
10.5+(8)	Employment Agreement with Deming Xiao, and Amendment thereof.
10.6+(9)	Letter Agreement with Victor Lee.
10.7+(10)	Letter Agreement with Jeff Zhou.
10.8+(11)	Monolithic Power Systems, Inc. Master Cash Performance Bonus Plan.
10.9+(12)	Letter Agreement with Eugen Elmiger.
10.10+(13)	Monolithic Power Systems, Inc. 2014 Equity Incentive Plan, as amended, and Form of Grant Agreement.

10.11+(14)	Employment Agreement with Bernie Blegen.
10.12+(15)	Employment Agreement with Saria Tseng and Amendment thereof.
10.13+(16)	Monolithic Power Systems, Inc. Amended and Restated 2014 Equity Incentive Plan.
10.14+(17)	Form of Grant Agreement for grants of Performance Stock Units under the Monolithic Power Systems, Inc. Amended and Restated 2014 Equity Incentive Plan.
10.15+(18)	Letter Agreement with Carintia Martinez.
10.16+(19)	Indemnification Agreement with Carintia Martinez.
10.17+(20)	Letter Agreement with Eileen Wynne.
10.18+(21)	Indemnification Agreement with Eileen Wynne.
10.19+(22)	Monolithic Power Systems, Inc. 2004 Employee Stock Purchase Plan, Amended and Restated as of August 16, 2023.
19.1 (23)	Monolithic Power Systems, Inc. Insider Trading Compliance Program.
21.1	Subsidiaries of Monolithic Power Systems, Inc.
23.1	Consent of Independent Registered Public Accounting Firm.
31.1	Certification of Chief Executive Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Securities Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1*	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
97.1+(24)	Monolithic Power Systems, Inc. Compensation Clawback Policy.
101.INS	Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH	Inline XBRL Taxonomy Extension Schema Document
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)

+	Management contract or compensatory plan or arrangement.
*	This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference in any filings under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether made before or after the date hereof and irrespective of any general incorporation language in any filings.
(1)	Incorporated by reference to Exhibit 3.1 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on June 16, 2025.
(2)	Incorporated by reference to Exhibit 3.1 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on November 21, 2025.
(3)	Incorporated by reference to Exhibit 4.1 of the Registrant’s annual report on Form 10-K (File No. 000-51026), filed with the Securities and Exchange Commission on February 28, 2020.
(4)	Incorporated by reference to Exhibit 10.3 of the Registrant’s Registration Statement on Form S-1/A (Registration No. 333-117327), filed with the Securities and Exchange Commission on November 15, 2004.

(5)	Incorporated by reference to Exhibit 10.4 of the Registrant’s Registration Statement on Form S-1/A (Registration No. 333-117327), filed with the Securities and Exchange Commission on November 15, 2004.
(6)	Incorporated by reference to Exhibit 10.7 of the Registrant’s annual report on Form 10-K (File No. 000-51026), filed with the Securities and Exchange Commission on March 11, 2008 and Exhibit 10.1 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on December 19, 2008.
(7)	Incorporated by reference to Exhibit 10.8 of the Registrant’s annual report on Form 10-K (File No. 000-51026), filed with the Securities and Exchange Commission on March 11, 2008 and Exhibit 10.3 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on December 19, 2008.
(8)	Incorporated by reference to Exhibit 10.10 of the Registrant’s annual report on Form 10-K (File No. 000-51026), filed with the Securities and Exchange Commission on March 11, 2008 and Exhibit 10.4 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on December 19, 2008.
(9)	Incorporated by reference to Exhibit 10.1 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on September 14, 2006.
(10)	Incorporated by reference to Exhibit 10.1 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on February 3, 2010.
(11)	Incorporated by reference to Annexure C of the Registrant’s Proxy Statement on Schedule 14A (File No. 000-51026), filed with the Securities and Exchange Commission on April 30, 2013.
(12)	Incorporated by reference to Exhibit 10.36 of the Registrant’s annual report on Form 10-K (File No. 000-51026), filed with the Securities and Exchange Commission on March 10, 2014.
(13)	Incorporated by reference to Exhibit 4.6 of the Registrant’s Registration Statement on Form S-8 (Registration No. 333-199782), filed with the Securities and Exchange Commission on November 3, 2014.
(14)	Incorporated by reference to Exhibit 10.1 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on July 22, 2016.
(15)	Incorporated by reference to Exhibit 10.14 of the Registrant’s annual report on Form 10-K (File No. 000-51026), filed with the Securities and Exchange Commission on February 28, 2020.
(16)	Incorporated by reference to Annexure B of the Registrant’s Proxy Statement on Schedule 14A (File No. 000-51026), filed with the Securities and Exchange Commission on April 29, 2020.
(17)	Incorporated by reference to Exhibit 10.3 of the Registrant’s quarterly report on Form 10-Q (File No. 000-51026), filed with the Securities and Exchange Commission on May 5, 2023.
(18)	Incorporated by reference to Exhibit 10.1 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on May 28, 2021.
(19)	Incorporated by reference to Exhibit 10.2 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on May 28, 2021.
(20)	Incorporated by reference to Exhibit 10.1 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on February 8, 2023.
(21)	Incorporated by reference to Exhibit 10.2 of the Registrant’s current report on Form 8-K (File No. 000-51026), filed with the Securities and Exchange Commission on February 8, 2023.
(22)	Incorporated by reference to Exhibit 10.1 of the Registrant’s quarterly report on Form 10-Q (File No. 000-51026), filed with the Securities and Exchange Commission on August 4, 2023.
(23)	Incorporated by reference to Exhibit 19.1 of the Registrant’s annual report on Form 10-K (File No. 000-51026), filed with the Securities and Exchange Commission on March 3, 2025.
(24)	Incorporated by reference to Exhibit 97.1 of the Registrant’s annual report on Form 10-K (File No. 000-51026), filed with the Securities and Exchange Commission on February 29, 2024.

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