Monolithic Power Systems (MPWR)Rep. Byron Donalds (FL19) disclosed a partial sale $1K–$15K

$1,001–$15,000

Reported range · official band, not an exact amount

40 days

Disclosure lag

Traded

Jun 5, 2026

Disclosed

Jul 15, 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.

1. Apr 6, 2026Insider · 1 personInsiders: 8 sales (~$8.9M)
2. Apr 8, 2026Insider · 1 personInsiders: 10 sales (~$11.7M)
3. Apr 29, 20265% stakeVanguard Portfolio Management reported a passive stake (13G) of 5.1%
4. Apr 30, 2026Company filing · Form 8-K · ResultsReported its results
5. Apr 30, 20265% stakeVanguard Capital Management reported a passive stake (13G) of 7.3%
6. May 4, 2026InsiderOfficer sold ~$48K of MPWR shares in the open market
7. May 5, 2026Insider · 2 peopleInsiders: 3 sales (~$2.2M)
8. May 6, 2026Insider · 4 peopleInsiders: 15 sales (~$70.0M)
9. May 15, 2026Insider · 1 personInsiders: 8 sales (~$18.7M)
10. May 18, 2026Insider · 2 peopleInsiders: 14 sales (~$59.3M)
11. May 22, 2026InsiderOfficer sold ~$7.93M of MPWR shares in the open market
12. May 26, 2026Insider · 2 peopleInsiders: 2 sales (~$853K)
13. May 27, 2026InsiderOfficer sold ~$12.9M of MPWR shares in the open market
14. Jun 1, 2026InsiderOfficer sold ~$46K of MPWR shares in the open market
15. Jun 5, 2026 · this disclosureCongressDisclosed partial sale of MPWR — reported range $1,001 - $15,000

What came next

1. Jun 5, 2026CongressDisclosed partial sale of MPWR — reported range $1,001 - $15,000
2. Jul 1, 2026InsiderOfficer sold ~$41K of MPWR shares in the open market
3. Jul 8, 20265% stakeFMR LLC reported a passive stake (13G) of 10.5%
4. Jul 15, 20265% stakeInvesco Ltd. reported a passive stake (13G) of 5.2%
5. Jul 15, 2026Insider · 1 personInsiders: 13 sales (~$19.0M)
6. Jul 30, 2026Company filing · Form 8-K · ResultsReported its results
7. Sep 14, 2026Government · Federal Register noticeNotice of Receipt of Complaint; Solicitation of Comments Relating to the Public Interest

How to read House Clerk periodic transaction report

The STOCK Act is a 2012 US law that requires members of Congress, and some senior staff, to publicly report their stock trades, and those of their spouse and dependent children, within 45 days.

Full guide: What is the STOCK Act?

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 Rep. Byron Donalds (FL19)

• House Clerk periodic transaction report at Howmet Aerospace (HWM)Sep 15, 2026
• House Clerk periodic transaction report at Howmet Aerospace (HWM)Sep 15, 2026
• House Clerk periodic transaction report at Netflix (NFLX)Sep 15, 2026
• House Clerk periodic transaction report at Netflix (NFLX)Sep 15, 2026
• House Clerk periodic transaction report at Parker Hannifin (PH)Sep 15, 2026

The full history of Rep. Byron Donalds (FL19) is on the profile page.

How this filing works

• The STOCK Act

Other disclosures at Monolithic Power Systems

• SEC Form 4Sep 30, 2026
• SEC Form 4Sep 30, 2026
• SEC Form 4Sep 30, 2026
• SEC Form 4Sep 30, 2026
• SEC Form 4Sep 30, 2026
• SEC Form 4Sep 30, 2026

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