Monolithic Power SystemsMPWR
Semiconductors & chip supply chain
Insider transactions
Directors, officers and 10% owners, as reported on Forms 3, 4 and 5. Grants, option exercises and shares withheld for tax are shown but not counted as buying or selling.
- Open-market buys
- 0
- Open-market sales
- 322
- Shares bought
- 0
- Shares sold
- 605,391
Past 12 months · $0.00 bought, $708.7M sold
| Filed | Insider | Transaction | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|
| Saria TsengCLO · EVP | HoldingForm 4 · indirect | 0 | — | — | 1,000 | |
| traded Aug 31, 2026 | Saria TsengCLO · EVP | GiftForm 4 | 2,000 | $0.00 | $0.00 | 142,218 |
| traded Aug 31, 2026 | Saria TsengCLO · EVP | GiftForm 4 · indirect | 2,000 | $0.00 | $0.00 | 2,000 |
| Robert W. Dean IICFO · Interim | HoldingForm 4 · indirect | 0 | — | — | 65 | |
| traded Aug 24, 2026 | Robert W. Dean IICFO · Interim | Open-market saleForm 4 | 32 | $1,297.72 | $41,527 | 7,094 |
| traded Aug 24, 2026 | Robert W. Dean IICFO · Interim | OtherForm 4 | 5 | $0.00 | $0.00 | 7,089 |
| traded Aug 24, 2026 | Kuo Wei Herbert ChangDirector | Open-market saleForm 4 | 50 | $1,281.57 | $64,078 | 515 |
| Robert W. Dean IICFO · Interim | HoldingForm 4 · indirect | 0 | — | — | 65 | |
| traded Aug 17, 2026 | Robert W. Dean IICFO · Interim | Open-market saleForm 4 | 6 | $1,413.64 | $8,482 | 7,126 |
| traded Aug 11, 2026 | Kuo Wei Herbert ChangDirector | Open-market saleForm 4 | 50 | $1,420.00 | $71,000 | 565 |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 1,699 | |
| Robert W. Dean IICFO · Interim | HoldingForm 4 · indirect | 0 | — | — | 65 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 2,000 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 4,015 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 5,000 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 1,699 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 919 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 52,586 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 1,699 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 1,000 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 1,119 | |
| traded Aug 5, 2026 | Robert W. Dean IICFO · Interim | Open-market saleForm 4 | 105 | $1,344.27 | $141,148 | 7,132 |
| traded Aug 4, 2026 | Maurice SciammasEVP | GiftForm 4 · indirect | 25,000 | $0.00 | $0.00 | 36,062 |
| traded Aug 4, 2026 | Maurice SciammasEVP | GiftForm 4 | 25,000 | $0.00 | $0.00 | 126,644 |
| Maurice SciammasEVP | HoldingForm 4 | 0 | — | — | 151,644 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 4,015 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 2,000 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 1,699 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 919 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 1,699 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 11,062 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 52,586 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 1,000 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 5,000 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 1,699 | |
| traded Aug 3, 2026 | Maurice SciammasEVP | Open-market saleForm 4 · indirect | 30 | $1,343.94 | $40,318 | 1,119 |
| Robert W. Dean IICFO · Interim | HoldingForm 4 · indirect | 0 | — | — | 65 | |
| traded Jul 25, 2026 | Robert W. Dean IICFO · Interim | Grant or awardForm 4 | 1,359 | $0.00 | $0.00 | 7,237 |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 52,586 | |
| Maurice SciammasEVP | HoldingForm 4 · indirect | 0 | — | — | 4,015 |