MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2025

Feb 21, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2025-02-18

Reporting Person: Sciammas Maurice (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-02-18	Common Stock	G	1102	—	Disposed	19104	Indirect
2025-02-18	Common Stock	G	1102	—	Acquired	38216	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	102325	Direct
Common Stock	10899	Indirect
Common Stock	1699	Indirect
Common Stock	10899	Indirect
Common Stock	2000	Indirect
Common Stock	5000	Indirect
Common Stock	16015	Indirect
Common Stock	1699	Indirect
Common Stock	2000	Indirect
Common Stock	1699	Indirect

Footnotes

F1: 1,102 shares were transferred from Siblings 2021 GRATs, on which the reporting person is a Trustee, to the Sciammas Family Trust, on which the reporting person is a Trustee. No funds were exchanged, and no sale of shares occurred in the transfer.

F2: 1,102 shares were received by the Sciammas Family Trust, on which the reporting person is a Trustee, transferred from Siblings 2021 GRATS, on which the reporting person is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer.

F3: Ending balance includes 24 shares acquired on February 17, 2025 through the Company's qualified ESPP program.