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MONOLITHIC POWER SYSTEMS INC Director's Dealing 2025

Oct 29, 2025

30057_dirs_2025-10-28_7dbf6640-f2c9-4304-8fb5-5f65215c89b4.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: 2025-10-25

Reporting Person: BLEGEN THEODORE (N/A)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2025-10-25 Common Stock A 87690 Acquired 125630 Direct

Holdings (Non-Derivative)

Security Shares Ownership
Common Stock 5331 Indirect
Common Stock 5331 Indirect

Footnotes

F1: On October 25, 2022, the reporting person was granted market-based restricted stock units ("MSUs") subject to the achievement of five stock price targets and relative total stockholder return percentile rank over a three-year performance and vesting period. On October 25, 2025, the Company's Compensation Committee of the Board of Directors certified and approved the achievement of the performance criteria for the MSUs, which resulted in 87,690 shares being awarded to the reporting person. All of the shares fully vested on October 25, 2025, pursuant to the grant agreement.