Monolithic Power Systems Inc Insider Trading
Every director, officer and 10% holder of Monolithic Power Systems Inc has to report each trade in its stock within two business days of making it. This is those filings.
MPWR on carbonthat →Purchases and sales
Open-market trades only — the lines where someone chose to buy or sell at the going price.
| Insider | Action | Value |
|---|---|---|
| Robert W Dean IIInterim CFO2026-08-2432 shat $1,297.72 | Sale | $41.5K |
| Kuo Wei Herbert ChangDirector2026-08-2450 shat $1,281.57 | Sale | $64.1K |
| Robert W Dean IIInterim CFO2026-08-176 shat $1,413.64 | Sale | $8.5K |
| Kuo Wei Herbert ChangDirector2026-08-1150 shat $1,420.00 | Sale | $71K |
| Robert W Dean IIInterim CFO2026-08-05105 shat $1,344.27 | Sale | $141.1K |
| Maurice SciammasEVP, WW Sales & Marketing2026-08-0330 shat $1,343.94 | Sale10b5-1 plan | $40.3K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15527 shat $1,314.03 | Sale10b5-1 plan | $692.5K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15274 shat $1,318.42 | Sale10b5-1 plan | $361.2K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15409 shat $1,323.93 | Sale10b5-1 plan | $541.5K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15464 shat $1,329.30 | Sale10b5-1 plan | $616.8K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15776 shat $1,334.59 | Sale10b5-1 plan | $1M |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-151.5K shat $1,339.59 | Sale10b5-1 plan | $2M |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-151.9K shat $1,344.16 | Sale10b5-1 plan | $2.5M |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-151.5K shat $1,348.91 | Sale10b5-1 plan | $2M |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-155.6K shat $1,352.95 | Sale10b5-1 plan | $7.6M |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-1550 shat $1,359.36 | Sale10b5-1 plan | $68K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15240 shat $1,369.18 | Sale10b5-1 plan | $328.6K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15472 shat $1,375.47 | Sale10b5-1 plan | $649.2K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15418 shat $1,378.73 | Sale10b5-1 plan | $576.3K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15410 shat $1,384.11 | Sale10b5-1 plan | $567.5K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-1550 shat $1,388.19 | Sale10b5-1 plan | $69.4K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15213 shat $1,396.16 | Sale10b5-1 plan | $297.4K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15117 shat $1,400.45 | Sale10b5-1 plan | $163.9K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-15110 shat $1,405.71 | Sale10b5-1 plan | $154.6K |
| Maurice SciammasEVP, WW Sales & Marketing2026-07-0130 shat $1,351.61 | Sale10b5-1 plan | $40.5K |
Source: SEC Form 4 filings, via EDGAR. A derivative line reports the shares underlying an option rather than stock outstanding, so it is marked and is not comparable with the rest. Value is shares times the reported price, and is blank where the filing priced the transaction at zero — a grant costs its recipient nothing. Insiders sell for reasons that have nothing to do with the company, which is why a sale is not read as a signal on its own.
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