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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1280452	Monolithic Power Systems Inc	MPWR	Semiconductors & Related Devices (3674)	770466789

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1360833	Maurice Sciammas	5808 Lake Washington Blvd Ne Kirkland WA 98033	Sr. V.p.of Sales And Marketing	No	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2023-01-03	5,528	$344.96	192,856	No	4	S	Direct
Common Stock	Acquisiton	2022-12-15	6,204	$0.00	13,502	No	4	G	Indirect	by Family Trust
Common Stock	Disposition	2022-12-15	3,102	$0.00	19,458	No	4	G	Indirect	Maurice Sciammas Trust FBO Oski Crew
Common Stock	Disposition	2022-12-15	3,102	$0.00	19,458	No	4	G	Indirect	Christina Sciammas Trust FBO Oski Crew

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	G	Indirect	by Family Trust
No	4	G	Indirect	Maurice Sciammas Trust FBO Oski Crew
No	4	G	Indirect	Christina Sciammas Trust FBO Oski Crew

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	2,000	Indirect	Rosalind Sciammas Family 2021 Trust
Common Stock	23,015	Indirect	By Sciammas Trust 2020
Common Stock	26,700	Indirect	By GRAT
Common Stock	1,699	Indirect	The Chloe Liliane Sciammas 2020 Irrevocable Trust
Common Stock	1,699	Indirect	The Joseph Roger Sciammas 2020 Irrevocable Trust
Common Stock	5,000	Indirect	Clement Sciammas Family 2021 Trust
Common Stock	2,000	Indirect	Peter Rafferty and Eric Toothill 2021Trust
Common Stock	1,699	Indirect	The Patrick Francis Sciammas 2020 Irrevocable Trust

Footnotes

The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plan.
6,204 shares were received by the Sciammas Family Trust, on which Maurice Sciammas is a Trustee, as a gift from the reporting person's two Trusts for the Oski Crew. No funds were exchanged and no sale of shares occurred in the transfer.
3,102 shares were transferred as a gift from the reporting person's Trust for the Oski Crew, on which Maurice Sciammas is the Trustee, to the Sciammas Family Trust, on which Maurice Sciammas is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer.
3,102 shares were transferred as a gift from the Christina Sciammas Trust for the Oski Crew to the Sciammas Family Trust, on which Maurice Sciammas is a Trustee. No funds were exchanged and no sale of shares occurred in the transfer.