SEC INSIDER TRANSACTIONS

MONOLITHIC POWER SYSTEMS, INC. (MPWR) Insider Transactions

Explore official ownership filings, with every record linked to its source.

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MPWR · MONOLITHIC POWER SYSTEMS, INC.

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Roles: director,officer,ten_percent_owner,otherOwner nameOfficer titleOwnership: D, I, unknownoriginal or amendedTransaction fromTransaction throughFiled fromFiled throughMinimum quantityMaximum quantityMinimum priceMaximum priceMinimum calculated valueMaximum calculated valueResults per page (1–100)

OR within codes/roles; AND between categories. Roles apply to buyers and sellers. Owner predicates match the same owner. Missing values fail numeric/date filters. Value is quantity × reported price for non-derivative rows only; derivative values are unknown. Amendments stay separate; joint owners do not duplicate rows.

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Stale snapshot · Covered: filings 2026-10-15 to 2026-11-13 · 2 filings · fetched 2026-11-13T18:57:49Z

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Recent reported activity

0purchase rows on this page

0sale rows on this page

2matching filing rows

Purchases and sales count original non-derivative P and S rows. Awards, gifts, exercises, derivatives and amendments are shown separately and are not described as market purchases.

Transaction / filed	Reporting owner(s)	Code / security	Quantity	Price as filed	Ownership	Source
2026-11-03Filed 2026-11-05	Sciammas MauriceOfficer · EVP, WW Sales & Marketing Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 Ending balance includes 8 shares acquired on August 17, 2026 through the Company's qualified ESPP program. F2 13,000 shares were transferred from the reporting person's direct holdings to two GRATs, of which the reporting person is a trustee. No funds were exchanged and no sale of shares occurred in the transfer. F3 13,000 shares were received by two GRATs, of which the reporting person is a trustee, from the reporting person's direct holdings. No funds were exchanged and no sale of shares occurred in the transfer. References: F3	G GiftCommon Stock · Non-derivative	13,000A	0	IndirectVarious Sciammas GRATs	Form 4 ↗0001214659-26-013798
2026-11-03Filed 2026-11-05	Sciammas MauriceOfficer · EVP, WW Sales & Marketing Filing context Reported filing row; may be amended. Do not sum filings blindly. F1 Ending balance includes 8 shares acquired on August 17, 2026 through the Company's qualified ESPP program. F2 13,000 shares were transferred from the reporting person's direct holdings to two GRATs, of which the reporting person is a trustee. No funds were exchanged and no sale of shares occurred in the transfer. F3 13,000 shares were received by two GRATs, of which the reporting person is a trustee, from the reporting person's direct holdings. No funds were exchanged and no sale of shares occurred in the transfer. References: F2, F1	G GiftCommon Stock · Non-derivative	13,000D	0	Direct	Form 4 ↗0001214659-26-013798

Imported instruments only. Joint owners do not multiply transactions. Amendments are separate filing rows, not additional trades. No aggregate trade totals are implied.