Saria Tseng sold $26M of MPWR
EVP & General Counsel at MONOLITHIC POWER SYSTEMS INC. 25,674 shares at an average of $1,010.50, traded Mar 30, 2026, filed Apr 1, 2026.
Score components
- +15RoleOfficer
- +25Trade size$25.9M at market
- +5Share of holdings soldSold 13% of holdings
- +8Cluster2 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 0001214659-26-004185, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Mar 30, 2026 | SOpen-market sale Common Stock10b5-1 | -5,154 | $1,000.81 | $5.2M | 195,502 | Apr 1, 2026 |
| Mar 30, 2026 | SOpen-market sale Common Stock10b5-1 | -9,080 | $1,005.18 | $9.1M | 186,422 | Apr 1, 2026 |
| Mar 30, 2026 | SOpen-market sale Common Stock10b5-1 | -3,360 | $1,009.63 | $3.4M | 183,062 | Apr 1, 2026 |
| Mar 30, 2026 | SOpen-market sale Common Stock10b5-1 | -3,194 | $1,017.22 | $3.2M | 179,868 | Apr 1, 2026 |
| Mar 30, 2026 | SOpen-market sale Common Stock10b5-1 | -2,200 | $1,023.00 | $2.3M | 177,668 | Apr 1, 2026 |
| Mar 30, 2026 | SOpen-market sale Common Stock10b5-1 | -2,440 | $1,029.21 | $2.5M | 175,228 | Apr 1, 2026 |
| Mar 30, 2026 | SOpen-market sale Common Stock10b5-1 | -166 | $1,035.60 | $172k | 175,062 | Apr 1, 2026 |
| Mar 30, 2026 | SOpen-market sale Common Stock10b5-1 | -80 | $1,041.12 | $83k | 174,982 | Apr 1, 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.