Maurice Sciammas sold $19M of MPWR
EVP, WW Sales & Marketing at MONOLITHIC POWER SYSTEMS INC. 12,000 shares at an average of $1,561.40, traded May 15, 2026, filed May 19, 2026.
Score components
- +15RoleOfficer
- +25Trade size$18.7M at market
- 0Share of holdings soldSold 6.7% of holdings
- +15Cluster8 insiders selling within 14 days
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001214659-26-006583, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| May 15, 2026 | SOpen-market sale Common Stock10b5-1 | -3,741 | $1,550.36 | $5.8M | 174,903 | May 19, 2026 |
| May 15, 2026 | SOpen-market sale Common Stock10b5-1 | -1,717 | $1,557.48 | $2.7M | 173,186 | May 19, 2026 |
| May 15, 2026 | SOpen-market sale Common Stock10b5-1 | -2,010 | $1,562.01 | $3.1M | 171,176 | May 19, 2026 |
| May 15, 2026 | SOpen-market sale Common Stock10b5-1 | -2,020 | $1,567.15 | $3.2M | 169,156 | May 19, 2026 |
| May 15, 2026 | SOpen-market sale Common Stock10b5-1 | -1,312 | $1,571.49 | $2.1M | 167,844 | May 19, 2026 |
| May 15, 2026 | SOpen-market sale Common Stock10b5-1 | -703 | $1,577.75 | $1.1M | 167,141 | May 19, 2026 |
| May 15, 2026 | SOpen-market sale Common Stock10b5-1 | -447 | $1,582.21 | $707k | 166,694 | May 19, 2026 |
| May 15, 2026 | SOpen-market sale Common Stock10b5-1 | -50 | $1,585.51 | $79k | 166,644 | May 19, 2026 |
Related signals
Other insiders at MONOLITHIC POWER SYSTEMS INC and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 30Weak | MONOLITHIC POWER SYSTEMS INC | Michael Hsing CEO | $40M 30,000 shares | -4% | |
| 36Weak | MONOLITHIC POWER SYSTEMS INC | Robert W Dean II Interim CFO | $42k 32 shares | -0% | |
| 31Weak | MONOLITHIC POWER SYSTEMS INC | Kuo Wei Herbert Chang director | $64k 50 shares | -9% | |
| 37Weak | MONOLITHIC POWER SYSTEMS INC | Robert W Dean II Interim CFO | $8,482 6 shares | -0% | |
| 38Weak | MONOLITHIC POWER SYSTEMS INC | Kuo Wei Herbert Chang director | $71k 50 shares | -8% | |
| 48Moderate | MONOLITHIC POWER SYSTEMS INC | Robert W Dean II Interim CFO | $141k 105 shares | -1% | |
| 16Weak | MONOLITHIC POWER SYSTEMS INC | Maurice Sciammas EVP, WW Sales & Marketing | $40k 30 shares | -3% | |
| 20Weak | MONOLITHIC POWER SYSTEMS INC | Maurice Sciammas EVP, WW Sales & Marketing | $20M 15,000 shares | -9% | |
| 1Weak | MONOLITHIC POWER SYSTEMS INC | Maurice Sciammas EVP, WW Sales & Marketing | $41k 30 shares | -3% | |
| 16Weak | MONOLITHIC POWER SYSTEMS INC | Maurice Sciammas EVP, WW Sales & Marketing | $46k 30 shares | -2% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.