MPWR · ISSUER CIK 1280452
MONOLITHIC POWER SYSTEMS, INC.
Between Jul 31, 2026 and Oct 28, 2026, 5 MONOLITHIC POWER SYSTEMS, INC. insiders reported $0.00 of open-market purchases and $40.7M of sales on SEC Form 4.
↗5 insiders filed
Original Form 4 filings from Jul 31, 2026 to Oct 28, 2026. 2 of 7 sales were reported under a 10b5-1 plan.
$0.00Insider buying
$40.7MInsider selling
−$40.7MNet open-market
Sep 30, 2026Latest filing
| Ticker | Insider | Type | Owned | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 30, 202617:21 | Sep 28, 2026 | MPWR | CEO, Director | S · Sell10b5-1 | $1,344.97 | −30,000 | 818,264 | -4% | −$40.3M | ||
| Sep 2, 202617:26 | Aug 31, 2026 | MPWR | EVP & General Counsel | G · Gift | — | −2,000 | 142,218 | -1% | — | ||
| Sep 2, 202617:26 | Aug 31, 2026 | MPWR | EVP & General Counsel | G · Gift | — | +2,000 | 2,000 | New | — | ||
| Aug 26, 202619:22 | Aug 24, 2026 | MPWR | Interim CFO | S · Sell | $1,297.72 | −32 | 7,094 | -0% | −$42K | ||
| Aug 26, 202619:22 | Aug 24, 2026 | MPWR | Interim CFO | J · Other | — | −5 | 7,089 | -0% | — | ||
| Aug 25, 202619:13 | Aug 24, 2026 | MPWR | Director | S · Sell | $1,281.57 | −50 | 515 | -9% | −$64K | ||
| Aug 19, 202620:44 | Aug 17, 2026 | MPWR | Interim CFO | S · Sell | $1,413.64 | −6 | 7,126 | -0% | −$8K | ||
| Aug 13, 202617:23 | Aug 11, 2026 | MPWR | Director | S · Sell | $1,420.00 | −50 | 565 | -8% | −$71K | ||
| Aug 6, 202620:31 | Aug 4, 2026 | MPWR | EVP, WW Sales & Marketing | G · Gift | — | −25,000 | 126,644 | -16% | — | ||
| Aug 6, 202620:31 | Aug 4, 2026 | MPWR | EVP, WW Sales & Marketing | G · Gift | — | +25,000 | 36,062 | +226% | — | ||
| Aug 6, 202618:20 | Aug 5, 2026 | MPWR | Interim CFO | S · Sell | $1,344.27 | −105 | 7,132 | -1% | −$141K | ||
| Aug 5, 202617:33 | Aug 3, 2026 | MPWR | EVP, WW Sales & Marketing | S · Sell10b5-1 | $1,343.94 | −30 | 1,119 | -3% | −$40K |