Theodore Blegen sold $2.7M of MPWR
EVP and CFO at MONOLITHIC POWER SYSTEMS INC. 3,000 shares at an average of $908.21, traded Dec 1, 2025, filed Dec 2, 2025.
Score components
- +22RoleCFO
- +25Trade size$2.7M at market
- 0Share of holdings soldSold 4.0% 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 0001214659-25-017534, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Dec 1, 2025 | SOpen-market sale Common Stock10b5-1 | -40 | $899.73 | $36k | 74,292 | Dec 2, 2025 |
| Dec 1, 2025 | SOpen-market sale Common Stock10b5-1 | -40 | $900.88 | $36k | 74,252 | Dec 2, 2025 |
| Dec 1, 2025 | SOpen-market sale Common Stock10b5-1 | -80 | $901.88 | $72k | 74,172 | Dec 2, 2025 |
| Dec 1, 2025 | SOpen-market sale Common Stock10b5-1 | -40 | $902.31 | $36k | 74,132 | Dec 2, 2025 |
| Dec 1, 2025 | SOpen-market sale Common Stock10b5-1 | -120 | $904.38 | $109k | 74,012 | Dec 2, 2025 |
| Dec 1, 2025 | SOpen-market sale Common Stock10b5-1 | -80 | $906.84 | $73k | 73,932 | Dec 2, 2025 |
| Dec 1, 2025 | SOpen-market sale Common Stock10b5-1 | -80 | $907.59 | $73k | 73,852 | Dec 2, 2025 |
| Dec 1, 2025 | SOpen-market sale Common Stock10b5-1 | -480 | $908.69 | $436k | 73,372 | Dec 2, 2025 |
| Dec 1, 2025 | SOpen-market sale Common Stock10b5-1 | -1,984 | $909.00 | $1.8M | 71,388 | Dec 2, 2025 |
| Dec 1, 2025 | SOpen-market sale Common Stock10b5-1 | -56 | $911.59 | $51k | 71,332 | Dec 2, 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% | |
| 37Weak | MONOLITHIC POWER SYSTEMS INC | Kuo Wei Herbert Chang director | $90k 100 shares | -19% | |
| 37Weak | MONOLITHIC POWER SYSTEMS INC | Kuo Wei Herbert Chang director | $87k 100 shares | -16% | |
| 27Weak | MONOLITHIC POWER SYSTEMS INC | Theodore Blegen EVP and CFO | $3.1M 3,000 shares | -4% | |
| 42Moderate | MONOLITHIC POWER SYSTEMS INC | Theodore Blegen EVP and CFO | $2.7M 3,000 shares | -7% | |
| 35Weak | MONOLITHIC POWER SYSTEMS INC | Saria Tseng EVP & General Counsel | $13M 14,510 shares | -9% | |
| 55Moderate | MONOLITHIC POWER SYSTEMS INC | Carintia Martinez director | $1.3M 1,400 shares | -61% | |
| 42Moderate | MONOLITHIC POWER SYSTEMS INC | Theodore Blegen EVP and CFO | $2.4M 3,000 shares | -7% | |
| 60Notable | MONOLITHIC POWER SYSTEMS INC | Eugen J Elmiger director | $3.4M 4,000 shares | -19% | |
| 41Moderate | MONOLITHIC POWER SYSTEMS INC | Jeff Zhou director | $168k 193 shares | -3% |
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.