Monolithic Power Systems (MPWR): Officer sold, ~$26.8M

~$26.8M
Approx. value · 23K sh @ $1,171.16: 179K
Holds after · shares reported

Traded: Feb 6, 2026
Filed: Feb 10, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

Dec 24, 2025Insider · 1 personInsiders: 6 sales (~$952K)
Jan 2, 2026Insider · 2 peopleInsiders: 16 sales (~$3.4M)
Jan 5, 2026Congress · 1 personMembers of Congress: 2 purchases
Jan 8, 20265% stakeBlackRock, Inc. reported a passive stake (13G) of 10.2%
Jan 14, 2026Government · Federal Register noticeNotice of Receipt of Complaint; Solicitation of Comments Relating to the Public Interest
Feb 2, 2026Insider · 1 personInsiders: 17 sales (~$3.4M)
Feb 3, 2026Company filing · Form 8-K · Results, Executive changeChanged a top executive or board member, and reported its results (and 1 more item)“On February 3, 2026, Bernie Blegen informed the Company’s Board of Directors (the “Board”) of his intention to retire from his position as Executive Vice President and Chief Financial Officer.”
Feb 4, 2026CongressDisclosed purchase of MPWR — reported range $15,001 - $50,000
Feb 5, 20265% stakeFMR LLC reported a passive stake (13G) of 8.3%
Feb 6, 2026 · this disclosureInsider · Their largest sale since 2006Officer sold ~$26.8M of MPWR shares in the open market

What came next

Feb 6, 2026Insider · 4 peopleInsiders: 4 sales (~$143.3M)
Feb 9, 2026InsiderDirector sold ~$485K of MPWR shares in the open market
Feb 10, 2026Insider · 1 personInsiders: 9 sales (~$38.8M)
Feb 11, 2026Insider · 2 peopleInsiders: 11 sales (~$39.5M)
Feb 12, 2026Insider · 1 personInsiders: 12 sales (~$38.7M)
Feb 17, 2026Government · Federal Register noticeCertain Power Converters, Circuit Board Assemblies, and Computing Systems Containing the Same; Notice of Institution of Investigation
Feb 26, 2026Company filing · Form 8-K · RestatementSaid past financial statements can no longer be relied on
Mar 27, 20265% stakeThe Vanguard Group reported a passive stake (13G)
Apr 29, 20265% stakeVanguard Portfolio Management reported a passive stake (13G) of 5.1%
Apr 30, 2026Company filing · Form 8-K · ResultsReported its results
Apr 30, 20265% stakeVanguard Capital Management reported a passive stake (13G) of 7.3%

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Monolithic Power Systems

For Monolithic Power Systems, OQRO holds 33 insider filings (SEC Form 4 or Form 144), 2 Congress trade reports and 23 fund holdings reports (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its MPWR page.

Other recent filings by Maurice Sciammas, EVP, WW Sales & Marketing

The full history of Maurice Sciammas, EVP, WW Sales & Marketing is on the profile page.

Other disclosures at Monolithic Power Systems

Everything OQRO holds on this company is on its MPWR page.

Monolithic Power Systems (MPWR)Officer sold ~$26.8M