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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 & Marketing	No	Yes	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	2020-05-29	45,000	$0.00	324,445	No	5	G	Direct
Common Stock	Acquisiton	2020-05-29	45,000	$0.00	45,000	No	4	G	Indirect	By Sciammas Trst2020
Common Stock	Disposition	2020-07-01	5,425	$235.16	319,020	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	5	G	Direct
No	4	G	Indirect	By Sciammas Trst2020
No	4	S	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	9,000	Indirect	By GRAT
Common Stock	2,000	Indirect	by Family Trust

Footnotes

This transaction involved a gift of securities by the reporting person to the Sciammas Family 2020 Irrevocable Trust DTD 04/29/2020.
The reported sales were to cover taxes upon the vesting of restricted stock units, as required by the Company's equity incentive plans.
Represents shares of stock owned by The Sciammas Family 2020 Irrevocable Trust DTD 04/29/2020. The reporting person is the trustee of the Sciammas Family 2020 Irrevocable Trust. The reporting person may be deemed to beneficially own the shares of common stock owned by The Sciammas Family 2020 Irrevocable Trust.