MONOLITHIC POWER SYSTEMS, INC. (MPWR) has 11 SEC Form 4 insider filings on record in the last 90 days. No insider purchases were filed — 8 sales totalling $20.7M. Most recent filing: Sept. 2, 2026.
| Date | Insider | Value | Shares | Stake | Pre-planned | Links |
|---|---|---|---|---|---|---|
| Sept. 2, 2026 filed Aug. 31, 2026 | Tseng Saria EVP & General Counsel | $0 | 4,000 | 0% | No | |
|
|
||||||
| Aug. 26, 2026 filed Aug. 24, 2026 | DEAN ROBERT W II Interim CFO | −$41,527 | 37 | −1% | No | |
|
|
||||||
| Aug. 25, 2026 filed Aug. 24, 2026 | CHANG KUO WEI HERBERT Director | −$64,079 | 50 | −9% | No | |
|
|
||||||
| Aug. 19, 2026 filed Aug. 17, 2026 | DEAN ROBERT W II Interim CFO | −$8,482 | 6 | −0% | No | |
|
|
||||||
| Aug. 13, 2026 filed Aug. 11, 2026 | CHANG KUO WEI HERBERT Director | −$71,000 | 50 | −8% | No | |
|
|
||||||
Showing the 5 most recent of 11 filings in the last 90 days.
Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.
Real-time Telegram alerts the moment a Form 4 is filed. Filings shown here are delayed by 72 hours.
Start free