MPWR Insider Trading Activity and SEC Form 4 Filings
Trump's trades in MPWR
From his financial disclosures
$297K+
8 purchases
$351K+
3 sales
Sale
Aug 21, 2026
Reported 48d later
$100K - $250K
Sale
Jul 17, 2026
Reported 67d later
$1K - $15K
Purchase
Apr 15, 2026
Reported 77d later
$1K - $15K
Sale
Apr 9, 2026
Reported 83d later
$250K - $500K
Purchase
Mar 25, 2026
Reported 50d later
$15K - $50K
Purchase
Mar 23, 2026
Reported 52d later
$15K - $50K
Many orders in these accounts are placed by the account manager. See all 11 trades
MPWR insider trading summary
Over the past 12 months, insiders at Monolithic Power Systems, Inc. (MPWR) reported 273 sales worth $684.1M by 11 insiders and no open-market purchases on SEC Form 4. Net insider selling was $684.1M.
Latest MPWR insider buys and sells
| Date | Insider | Role | Type | Value |
|---|---|---|---|---|
| Sep 28, 2026 | Michael Hsing | CEO | Sell | $14.8M (10,967 @ $1351.43) |
| Sep 28, 2026 | Michael Hsing | CEO | Sell | $3.9M (2,949 @ $1338.66) |
| Sep 28, 2026 | Michael Hsing | CEO | Sell | $8.5M (6,343 @ $1347.15) |
| Sep 28, 2026 | Michael Hsing | CEO | Sell | $176K (130 @ $1356.94) |
| Sep 28, 2026 | Michael Hsing | CEO | Sell | $2.8M (2,121 @ $1328.54) |
| Sep 28, 2026 | Michael Hsing | CEO | Sell | $1.5M (1,111 @ $1333.34) |
| Sep 28, 2026 | Michael Hsing | CEO | Sell | $7.8M (5,783 @ $1343.76) |
| Sep 28, 2026 | Michael Hsing | CEO | Sell | $789K (596 @ $1323.31) |
| Aug 24, 2026 | Kuo Wei Herbert Chang | Insider | Sell | $64K (50 @ $1281.57) |
| Aug 24, 2026 | Robert W Dean II | Interim CFO | Sell | $42K (32 @ $1297.72) |
Source: SEC Form 4 filings. Open-market purchases (code P) and sales (code S) only; option exercises, grants and gifts are excluded.