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MONOLITHIC POWER SYSTEMS INC

For the period ended Dec 31, 2024. Filed Mar 3, 2025.

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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.

FY2024 · Filed Mar 3, 2025

MPWR$1,388.05+16.6%Stored close · as of Nov 9, 2026

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Contents

Item 9B. Other Information

Item 9B.Other Information

10b5-1 Trading Plans

Certain of our executive officers and directors have entered into trading plans pursuant to Rule 10b5-1(c) of the Securities Exchange Act of 1934, as amended. A trading plan is a written document that pre-establishes the amounts, prices and dates (or formula for determining the amounts, prices and dates) of future purchases or sales of our common stock, including the sale of shares acquired pursuant to the Monolithic Power Systems, Inc. 2004 Employee Stock Purchase Plan, amended and restated, and upon vesting of RSUs.

The following table summarizes theadoption of trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) during the three months ended December 31, 2024:

Name and TitleAdoption DatePlan DurationIntended Sale Amount (in shares)
Carintia Martinez, DirectorNovember 27, 2024Through November 28, 2025Up to 1,400

During the three months ended December 31, 2024, no trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) were modified or terminated, andno other written trading arrangements that are not intended to qualify for the Rule 10b5-1(c) affirmative defense were adopted, modified, or terminated.

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