Monolithic Power Systems (MPWR) insider trading in the last 6 months

Form 4 filings, newest first

Quality Score today 12

8 insiders sold $151M. No buys.

SellRobert W. Dean II$42KInterim CFOat $1,297.72 on Aug 24, filed Aug 26

SellRobert W. Dean IIInterim CFO$42Kat $1,297.72 on Aug 24, filed Aug 26

SellKuo Wei Herbert Chang$64KDirectorat $1,281.57 on Aug 24, filed Aug 25

SellKuo Wei Herbert ChangDirector$64Kat $1,281.57 on Aug 24, filed Aug 25

SellRobert W. Dean II$8KInterim CFOat $1,413.64 on Aug 17, filed Aug 19

SellRobert W. Dean IIInterim CFO$8Kat $1,413.64 on Aug 17, filed Aug 19

From SEC Form 4s, the newest filed Aug 26, 2026 · Insiders have 2 business days to file a trade

35 more filings on MPWR in the last 6 months, for Pro members. See them free →

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Who files at Monolithic Power Systems

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Questions about MPWR's insider trades

As of Nov 2, 2026: Monolithic Power Systems (MPWR) has 38 insider filings on record in the last 6 months, the newest filed Aug 26, 2026. Its Quality Score is 12 (Above Average). Scores as of 5:08 PM ET, 15 minutes behind.

Are MPWR insiders buying or selling?

8 insiders sold $151M across 38 filings in the last 6 months. No open-⁠market buys on record. The newest filing: Robert W. Dean II, Interim CFO, sold $42K on Aug 24, 2026.

Who are MPWR's biggest insider sellers?

By the dollars of their sales in the last 6 months: Michael Hsing (CEO), 13 sales; Deming Xiao (EVP, Global Operations), 4 sales; Saria Tseng (EVP & General Counsel), 2 sales. 8 insiders sold in all.

When did an MPWR insider last buy?

No MPWR insider bought shares on the open market in the last 6 months, as filed on Form 4. The newest filing is a sale by Robert W. Dean II on Aug 24, 2026.

Monolithic Power Systems's page has its Quality Score, its chart, and its earnings. More in Technology and Semiconductors.