Insider trade

Monolithic Power Systems (MPWR)Director sold ~$800K

Jeff Zhou, Director at Monolithic Power Systems, sold ~$800K of Monolithic Power Systems shares.

~$800K
Approx. value · 500 sh @ $1,600.00: 4,786
Holds after · shares reported

Traded: May 5, 2026
Filed: May 6, 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.

Mar 20, 2026InsiderOfficer sold ~$33K of MPWR shares in the open market
Mar 27, 20265% stakeThe Vanguard Group reported a passive stake (13G)
Mar 30, 2026Insider · 1 personInsiders: 8 sales (~$25.9M)
Apr 1, 2026Insider · 2 peopleInsiders: 6 sales (~$1.6M)
Apr 6, 2026Insider · 1 personInsiders: 8 sales (~$8.9M)
Apr 8, 2026Insider · 1 personInsiders: 10 sales (~$11.7M)
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%
May 4, 2026InsiderOfficer sold ~$48K of MPWR shares in the open market
May 5, 2026 · this disclosureInsiderDirector sold ~$800K of MPWR shares in the open market

What came next

May 5, 2026Insider · 2 peopleInsiders: 2 sales (~$1.4M)
May 6, 2026Insider · 4 peopleInsiders: 15 sales (~$70.0M)
May 15, 2026Insider · 1 personInsiders: 8 sales (~$18.7M)
May 18, 2026Insider · 2 peopleInsiders: 14 sales (~$59.3M)
May 22, 2026InsiderOfficer sold ~$7.93M of MPWR shares in the open market
May 26, 2026Insider · 2 peopleInsiders: 2 sales (~$853K)
May 27, 2026InsiderOfficer sold ~$12.9M of MPWR shares in the open market
Jun 1, 2026InsiderOfficer sold ~$46K of MPWR shares in the open market
Jul 1, 2026InsiderOfficer sold ~$41K of MPWR shares in the open market
Jul 8, 20265% stakeFMR LLC reported a passive stake (13G) of 10.5%
Jul 15, 20265% stakeInvesco Ltd. reported a passive stake (13G) of 5.2%
Jul 30, 2026Company filing · Form 8-K · ResultsReported its results

View the official recordSEC Form 4

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 Jeff Zhou, Director

The full history of Jeff Zhou, Director is on the profile page.

How this filing works

Other disclosures at Monolithic Power Systems

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

This is one filing. OQRO holds the rest

Insider trades filed with the SEC, stock trades disclosed by members of Congress, fund holdings from 13F filings and federal contract awards, each one in plain words next to its official filing. On this page it opens why the trade stands out, what the company did around that time, the price since, and every field of the form.

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