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MONOLITHIC POWER SYSTEMS INC Director's Dealing 2025

Oct 31, 2025

30057_dirs_2025-10-31_d15cc8ba-3f88-4cea-9263-cbcad0e305f8.zip

Director's Dealing

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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: Xiao Deming (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 201637 Direct

Holdings (Non-Derivative)

Security Shares Ownership
Common Stock 20455 Indirect
Common Stock 4336 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.