MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2025

Oct 31, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2025-10-30

Reporting Person: Sciammas Maurice (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-10-30	Common Stock	F	54543	$1096.63	Disposed	183306	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	9481	Indirect
Common Stock	1699	Indirect
Common Stock	2000	Indirect
Common Stock	9481	Indirect
Common Stock	1499	Indirect
Common Stock	1499	Indirect
Common Stock	44930	Indirect
Common Stock	12228	Indirect
Common Stock	1699	Indirect
Common Stock	4015	Indirect
Common Stock	5000	Indirect
Common Stock	1000	Indirect
Common Stock	1699	Indirect

Footnotes

F1: The sales transaction reported in this Form 4 represents shares of common stock withheld by the Company to satisfy the income tax obligations in connection with the earnout and vesting of the market-based restricted stock units granted in October 2022, previously reported in a Form 4.