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MPWRMonolithic Power Systems

Michael Hsing

CEO, Director at Monolithic Power Systems, as of Sep 30, 2026Sold $355M of stock in the past 12 months: 44% under a disclosed plan, 18% to cover taxes and 38% with no plan disclosed.

Updated Oct 15, 2026 from SEC filings · covers Oct 16, 2025 to Oct 15, 2026
964K
shares held after the latest filing, Monolithic Power Systems
Vested shares reported on Forms 3, 4 and 5 only. Not the insider's whole wealth.
302K
shares sold, past 12 months
8
days with sales
$64.3M
largest single day, Feb 6, 2026
1
company filed for

Share of stake sold at Monolithic Power Systems is not shown: most of their shares vested during the period, so a percentage would mislead. Why

Selling by month

Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

Disclosed planTo cover taxesNo plan disclosedOne dollar scale for every month; the tallest bar is labeled
OctNov 2025: $74.1M no plan disclosedNovDecJanFeb 2026: $117M under a disclosed planFeb 2026: $64.3M to cover taxes$181MFebMarAprMay 2026: $59.3M no plan disclosedMayJunJulAugSep 2026: $40.3M under a disclosed planSepOct

Pattern

What the filings show, past 12 months. Nothing here rates or predicts.

Roles from filings

Every company we track where this person has filed, newest filing first.

CompanyTitleFirst filingLatest filing
Monolithic Power Systems (MPWR)CEO, DirectorNov 18, 2004Sep 30, 2026

Recent filings

The last 5 days with transactions, newest first, one line per trade date. Each number links to an SEC filing.

This page shows only what this person reported on SEC ownership filings. See the methodology. Spotted something wrong? Report an error.