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Filing Details

Accession Number:: 0001214659-25-002419
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2025-02-11 17:33:28
Reporting Period:: 2025-02-07

Accepted Time:: 2025-02-11 17:33:28
SEC Url:: Form 4 Filing

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	Evp, Ww Sales & Marketing	No	No	No	No

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2025-02-07	3,941	$701.03	19,074	No	4	S	Indirect	By Sciammas Trust 2020
Common Stock	Disposition	2025-02-07	1,600	$702.46	17,474	No	4	S	Indirect	By Sciammas Trust 2020
Common Stock	Disposition	2025-02-07	1,259	$703.88	16,215	No	4	S	Indirect	By Sciammas Trust 2020
Common Stock	Disposition	2025-02-07	200	$704.92	16,015	No	4	S	Indirect	By Sciammas Trust 2020

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By Sciammas Trust 2020
No	4	S	Indirect	By Sciammas Trust 2020
No	4	S	Indirect	By Sciammas Trust 2020
No	4	S	Indirect	By Sciammas Trust 2020

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	102,963	Direct
Common Stock	25,820	Indirect	by Family Trust
Common Stock	23,270	Indirect	By GRAT
Common Stock	1,699	Indirect	The Chloe Liliane 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	13,424	Indirect	Christina Sciammas Trust FBO Oski Crew
Common Stock	1,699	Indirect	The Patrick Francis Sciammas 2020 Irrevocable Trust
Common Stock	32,064	Indirect	Sciammas Family Trust
Common Stock	2,000	Indirect	Peter Rafferty and Eric Toothill 2021Trust
Common Stock	20,206	Indirect	Various Sciammas GRATs
Common Stock	13,424	Indirect	Maurice Sciammas Trust FBO Oski Crew
Common Stock	1,699	Indirect	The Joseph Roger Sciammas 2020 Irrevocable Trust

Footnotes

The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $701.00 to $701.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $702.04 to $702.93. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $703.32 to $704.11. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $704.59 to $705.24. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.