MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2022

May 16, 2022

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2022-05-09

Reporting Person: Sciammas Maurice (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2022-05-09	Common Stock	G	40700	$0.00	Disposed	227546	Direct
2022-05-09	Common Stock	G	18200	$0.00	Acquired	26700	Indirect
2022-05-09	Common Stock	G	11250	$0.00	Acquired	22560	Indirect
2022-05-09	Common Stock	G	11250	$0.00	Acquired	22560	Indirect
2022-05-12	Common Stock	S	1679	$388.10	Disposed	225867	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	7298	Indirect
Common Stock	1699	Indirect
Common Stock	1699	Indirect
Common Stock	1699	Indirect
Common Stock	2000	Indirect
Common Stock	5000	Indirect
Common Stock	23015	Indirect
Common Stock	2000	Indirect

Footnotes

F1: 40,700 shares were transferred as a gift from the reporting person's direct holdings to various trusts as indirect holdings. The reporting person (or his spouse) is the Trustee for these trusts. No funds were exchanged and no sale of shares occurred in the transfer.

F2: 18,200 shares were received by the GRAT as a gift from the reporting person. No funds were exchanged and no sale of shares occurred in the transfer.

F3: 11,250 shares were received by the M. Sciammas Trust FBO Oski Crew as a gift from the reporting person. No funds were exchanged and no sale of shares occurred in the transfer.

F4: 11,250 shares were received by the C. Sciammas Trust FBO Oski Crew as a gift from the reporting person. No funds were exchanged and no sale of shares occurred in the transfer.

F5: The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan.