Michael Hsing sold $38M of MPWR
CEO at MONOLITHIC POWER SYSTEMS INC. 40,000 shares at an average of $958.39, traded Nov 11, 2025, filed Nov 13, 2025.
Score components
- +25RoleCEO
- +25Trade size$38.3M at market
- 0Share of holdings soldSold 4.0% of holdings
- +15Cluster5 insiders selling within 14 days
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 +2.4%, 3m +25.3%, 6m +75.3%.
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 0001214659-25-016419, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Nov 11, 2025 | SOpen-market sale Common Stock | -80 | $951.69 | $76k | 995,589 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -1,516 | $952.62 | $1.4M | 994,073 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -2,927 | $953.69 | $2.8M | 991,146 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -7,934 | $954.61 | $7.6M | 983,212 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -4,056 | $955.46 | $3.9M | 979,156 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -797 | $956.50 | $762k | 978,359 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -1,020 | $957.71 | $977k | 977,339 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -2,500 | $958.59 | $2.4M | 974,839 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -4,010 | $959.45 | $3.8M | 970,829 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -2,734 | $960.45 | $2.6M | 968,095 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -3,900 | $961.47 | $3.7M | 964,195 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -4,172 | $962.57 | $4.0M | 960,023 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -1,894 | $963.41 | $1.8M | 958,129 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -739 | $964.38 | $713k | 957,390 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -321 | $965.44 | $310k | 957,069 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -1,246 | $966.30 | $1.2M | 955,823 | Nov 13, 2025 |
| Nov 11, 2025 | SOpen-market sale Common Stock | -154 | $967.15 | $149k | 955,669 | Nov 13, 2025 |
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% | |
| 16Weak | MONOLITHIC POWER SYSTEMS INC | Maurice Sciammas EVP, WW Sales & Marketing | $46k 30 shares | -2% | |
| 55Moderate | MONOLITHIC POWER SYSTEMS INC | Saria Tseng EVP & General Counsel | $13M 7,565 shares | -5% | |
| 43Moderate | MONOLITHIC POWER SYSTEMS INC | Robert W Dean II Interim CFO | $36k 22 shares | -0% | |
| 55Moderate | MONOLITHIC POWER SYSTEMS INC | Saria Tseng EVP & General Counsel | $7.9M 5,000 shares | -3% | |
| 57Moderate | MONOLITHIC POWER SYSTEMS INC | Jeff Zhou director | $816k 486 shares | -11% | |
| 37Weak | MONOLITHIC POWER SYSTEMS INC | Robert W Dean II Interim CFO | $6,253 4 shares | -0% | |
| 65Notable | MONOLITHIC POWER SYSTEMS INC | Michael Hsing CEO | $59M 40,000 shares | -5% | |
| 35Weak | MONOLITHIC POWER SYSTEMS INC | Maurice Sciammas EVP, WW Sales & Marketing | $19M 12,000 shares | -7% | |
| 75Notable | MONOLITHIC POWER SYSTEMS INC | Eugen J Elmiger director | $19M 12,000 shares | -69% |
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.