MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2022

May 5, 2022

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2022-05-04

Reporting Person: Sciammas Maurice (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2022-05-04	Common Stock	S	986	$453.1564	Disposed	268246	Direct
2022-04-01	Common Stock	G	6949	$0.00	Disposed	8500	Indirect
2022-04-01	Common Stock	G	1852	$0.00	Acquired	7298	Indirect
2022-04-01	Common Stock	G	1699	$0.00	Acquired	1699	Indirect
2022-04-01	Common Stock	G	1699	$0.00	Acquired	1699	Indirect
2022-04-01	Common Stock	G	1699	$0.00	Acquired	1699	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2000	Indirect
Common Stock	5000	Indirect
Common Stock	23015	Indirect
Common Stock	11310	Indirect
Common Stock	2000	Indirect
Common Stock	11310	Indirect

Footnotes

F1: The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan.

F2: 6,949 shares were transferred as a gift from the reporting person's GRATs to various family trusts on which Maurice Sciammas is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer.

F3: 1,852 shares were received by the Sciammas Family Trust as a gift from the reporting person's GRATs. No funds were exchanged and no sale of shares occurred in the transfer.

F4: 1,699 shares were received by the Patrick Francis Sciammas Trust as a gift from the reporting person's GRATs. No funds were exchanged and no sale of shares occurred in the transfer.

F5: 1,699 shares were received by the Chloe Liliane Sciammas Trust as a gift from the reporting person's GRATs. No funds were exchanged and no sale of shares occurred in the transfer.

F6: 1,699 shares were received by the Joseph Roger Sciammas Trust as a gift from the reporting person's GRATs. No funds were exchanged and no sale of shares occurred in the transfer.