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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	2022-05-09	40,700	$0.00	227,546	No	4	G	Direct
Common Stock	Acquisiton	2022-05-09	18,200	$0.00	26,700	No	4	G	Indirect	By GRAT
Common Stock	Acquisiton	2022-05-09	11,250	$0.00	22,560	No	4	G	Indirect	Maurice Sciammas Trust FBO Oski Crew
Common Stock	Acquisiton	2022-05-09	11,250	$0.00	22,560	No	4	G	Indirect	Christina Sciammas Trust FBO Oski Crew
Common Stock	Disposition	2022-05-12	1,679	$388.10	225,867	No	4	S	Direct

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

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	7,298	Indirect	by Family Trust
Common Stock	1,699	Indirect	The Patrick Francis Sciammas 2020 Irrevocable Trust
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	2,000	Indirect	Rosalind Sciammas Family 2021 Trust
Common Stock	5,000	Indirect	Clement Sciammas Family 2021 Trust
Common Stock	23,015	Indirect	By Sciammas Trust 2020
Common Stock	2,000	Indirect	Peter Rafferty and Eric Toothill 2021Trust

Footnotes

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