Michael Hsing sold $39M of MPWR
CEO at MONOLITHIC POWER SYSTEMS INC. 34,000 shares at an average of $1,142.28, traded Feb 10, 2026, filed Feb 12, 2026.
Score components
- +25RoleCEO
- +25Trade size$38.8M at market
- 0Share of holdings soldSold 3.4% of holdings
- +15Cluster6 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.
This signal so far: 1m -8.9%, 3m +39.9%, 6m +18.3%.
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 0001214659-26-001587, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Feb 10, 2026 | SOpen-market sale Common Stock10b5-1 | -4,302 | $1,132.01 | $4.9M | 983,932 | Feb 12, 2026 |
| Feb 10, 2026 | SOpen-market sale Common Stock10b5-1 | -6,325 | $1,136.75 | $7.2M | 977,607 | Feb 12, 2026 |
| Feb 10, 2026 | SOpen-market sale Common Stock10b5-1 | -16,080 | $1,141.88 | $18M | 961,527 | Feb 12, 2026 |
| Feb 10, 2026 | SOpen-market sale Common Stock10b5-1 | -3,864 | $1,145.90 | $4.4M | 957,663 | Feb 12, 2026 |
| Feb 10, 2026 | SOpen-market sale Common Stock10b5-1 | -1,215 | $1,151.11 | $1.4M | 956,448 | Feb 12, 2026 |
| Feb 10, 2026 | SOpen-market sale Common Stock10b5-1 | -694 | $1,154.96 | $802k | 955,754 | Feb 12, 2026 |
| Feb 10, 2026 | SOpen-market sale Common Stock10b5-1 | -360 | $1,161.41 | $418k | 955,394 | Feb 12, 2026 |
| Feb 10, 2026 | SOpen-market sale Common Stock10b5-1 | -880 | $1,176.04 | $1.0M | 954,514 | Feb 12, 2026 |
| Feb 10, 2026 | SOpen-market sale Common Stock10b5-1 | -280 | $1,197.26 | $335k | 954,234 | Feb 12, 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.