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Monolithic Power Systems (MPWR)Officer sold ~$31.2M

Deming Xiao, Officer at Monolithic Power Systems, sold ~$31.2M of Monolithic Power Systems shares.

~$31.2M
Approx. value · 40K sh @ $780.00
122K
Holds after · shares reported
Traded
Aug 1, 2025
Filed
Aug 4, 2025

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. Jul 1, 2025InsiderCFO sold ~$4.5M of MPWR shares in the open market
  2. Aug 1, 2025 · this disclosureInsiderOfficer sold ~$31.2M of MPWR shares in the open market

What came next

  1. Aug 1, 2025InsiderCFO sold ~$2.25M of MPWR shares in the open market
  2. Aug 12, 2025InsiderDirector sold ~$166K of MPWR shares in the open market
  3. Aug 13, 2025InsiderDirector sold ~$340K of MPWR shares in the open market
  4. Aug 15, 2025Insider · 1 personInsiders: 11 sales (~$16.8M)
  5. Aug 27, 2025InsiderDirector sold ~$168K of MPWR shares in the open market
  6. Aug 29, 2025Insider · 1 personInsiders: 6 sales (~$3.4M)
  7. Sep 2, 2025Insider · 1 personInsiders: 14 sales (~$2.4M)
  8. Sep 18, 2025Insider · 2 peopleInsiders: 2 sales (~$14.5M)
  9. Oct 15, 2025InsiderOfficer sold ~$14.3M of MPWR shares in the open market
  10. Oct 16, 2025Insider · 1 personInsiders: 2 sales (~$2.9M)
  11. Oct 24, 2025InsiderOfficer sold ~$1.41M of MPWR shares in the open market
  12. Oct 30, 2025Company filing · Form 8-K · ResultsReported its results
  13. Nov 3, 2025Insider · 1 personInsiders: 22 sales (~$3.1M)
  14. Nov 5, 2025InsiderOfficer sold ~$197K of MPWR shares in the open market
  15. Nov 12, 2025Insider · 1 personInsiders: 14 sales (~$33.3M)
  16. Nov 19, 2025Company filing · Form 8-K · Bylaws or charterChanged its bylaws, charter or fiscal year
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 Deming Xiao, EVP, Global Operations

The full history of Deming Xiao, EVP, Global Operations 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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OQRO describes public disclosures and context calculated from them. It does not give personalized advice and does not recommend any transaction. How OQRO treats data