Company · CIK 0001280452 · SIC 3674 — Semiconductors & Related Devices · Nasdaq
MONOLITHIC POWER SYSTEMS, INC. · MPWR
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 31, 2026 GForm 4 → | Sep 2, 5:26 pm EDT | Saria TsengEVP & General Counsel | 4,000 | — | — | 2,000 | — | |
| Aug 24, 2026 JForm 4 → | Aug 26, 7:22 pm EDT | Robert W Dean IIInterim CFO | 5 | — | — | 7,089 | — | |
| Aug 24, 2026 SForm 4 → | Aug 26, 7:22 pm EDT | Robert W Dean IIInterim CFO | 32 | $1,297.72 | $41,527 | 7,094 | −0.45% | |
| Aug 24, 2026 SForm 4 → | Aug 25, 7:13 pm EDT | Kuo Wei Herbert ChangDirector | 50 | $1,281.57 | $64,079 | 515 | −8.85% | |
| Aug 17, 2026 SForm 4 → | Aug 19, 8:44 pm EDT | Robert W Dean IIInterim CFO | 6 | $1,413.64 | $8,482 | 7,126 | −0.08% | |
| Aug 11, 2026 SForm 4 → | Aug 13, 5:23 pm EDT | Kuo Wei Herbert ChangDirector | 50 | $1,420.00 | $71,000 | 565 | −8.13% | |
| Aug 5, 2026 SForm 4 → | Aug 6, 6:20 pm EDT | Robert W Dean IIInterim CFO | 105 | $1,344.27 | $141,148 | 7,132 | −1.45% | |
| Aug 4, 2026 GForm 4 → | Aug 6, 8:31 pm EDT | Maurice SciammasEVP, WW Sales & Marketing | 50,000 | — | — | 36,062 | — | |
| Aug 3, 2026 SForm 4 → | Aug 5, 5:33 pm EDT | Maurice SciammasEVP, WW Sales & Marketing | 30 | $1,343.94 | $40,318 | 1,119 | −2.61% | 10b5-1 |
| Jul 25, 2026 AForm 4 → | Jul 28, 6:42 pm EDT | Robert W Dean IIInterim CFO | 1,359 | — | — | 7,237 | — | |
| Jul 15, 2026 SForm 4 → | Jul 17, 5:43 pm EDT | Maurice SciammasEVP, WW Sales & Marketing | 15,000 | $1,349.73 | $20,245,937 | 151,644 | −9.00% | 10b5-1 |
| Jul 1, 2026 SForm 4 → | Jul 6, 5:51 pm EDT | Maurice SciammasEVP, WW Sales & Marketing | 30 | $1,351.61 | $40,548 | 1,149 | −2.54% | 10b5-1 |
| Jun 1, 2026 SForm 4 → | Jun 3, 5:31 pm EDT | Maurice SciammasEVP, WW Sales & Marketing | 30 | $1,533.95 | $46,019 | 1,179 | −2.48% | 10b5-1 |
Reported at this company — derivatives (options, RSUs, warrants)
No reported derivative activity in this period.