Martina Flammer M.D. sold $27M of INSM
Chief Medical Officer at INSMED Inc. 186,648 shares at an average of $144.34, traded Sep 2, 2025, filed Sep 4, 2025.
Score components
- +15RoleOfficer
- +25Trade size$26.9M at market
- +20Share of holdings soldSold 69% of holdings
- +15Cluster5 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
- -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 +10.3%, 3m +43.9%, 6m +0.7%.
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 0001796960-25-000004, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Sep 2, 2025 | MOption exercise Common Stock10b5-1 | +13,680 | $34.03 | $466k | 96,791 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Common Stock10b5-1 | +17,160 | $26.46 | $454k | 113,951 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Common Stock10b5-1 | +25,710 | $26.43 | $680k | 139,661 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Common Stock10b5-1 | +38,846 | $17.07 | $663k | 178,507 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Common Stock10b5-1 | +13,072 | $19.74 | $258k | 191,579 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Common Stock10b5-1 | +36,555 | $18.95 | $693k | 228,134 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Common Stock10b5-1 | +23,835 | $29.13 | $694k | 251,969 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Common Stock10b5-1 | +17,790 | $25.83 | $460k | 269,759 | Sep 4, 2025 |
| Sep 2, 2025 | SOpen-market sale Common Stock10b5-1 | -19,066 | $141.27 | $2.7M | 250,693 | Sep 4, 2025 |
| Sep 2, 2025 | SOpen-market sale Common Stock10b5-1 | -5,877 | $142.03 | $835k | 244,816 | Sep 4, 2025 |
| Sep 2, 2025 | SOpen-market sale Common Stock10b5-1 | -35,245 | $143.16 | $5.0M | 209,571 | Sep 4, 2025 |
| Sep 2, 2025 | SOpen-market sale Common Stock10b5-1 | -28,063 | $144.05 | $4.0M | 181,508 | Sep 4, 2025 |
| Sep 2, 2025 | SOpen-market sale Common Stock10b5-1 | -63,782 | $145.33 | $9.3M | 117,726 | Sep 4, 2025 |
| Sep 2, 2025 | SOpen-market sale Common Stock10b5-1 | -34,615 | $146.05 | $5.1M | 83,111 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Stock Option (right to buy)derivative10b5-1 | -13,680 | $0.00 | $0 | 0 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Stock Option (right to buy)derivative10b5-1 | -17,160 | $0.00 | $0 | 0 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Stock Option (right to buy)derivative10b5-1 | -25,710 | $0.00 | $0 | 8,570 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Stock Option (right to buy)derivative10b5-1 | -38,846 | $0.00 | $0 | 25,898 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Stock Option (right to buy)derivative10b5-1 | -13,072 | $0.00 | $0 | 13,073 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Stock Option (right to buy)derivative10b5-1 | -36,555 | $0.00 | $0 | 73,110 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Stock Option (right to buy)derivative10b5-1 | -23,835 | $0.00 | $0 | 39,725 | Sep 4, 2025 |
| Sep 2, 2025 | MOption exercise Stock Option (right to buy)derivative10b5-1 | -17,790 | $0.00 | $0 | 53,370 | Sep 4, 2025 |
Related signals
Other insiders at INSMED Inc and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 50Moderate | INSMsell INSMED Inc | David R Brennan director | $3.1M 25,000 shares | -39% | |
| 70Notable | INSMED Inc | Melvin Sharoky Md director | $638k 5,000 shares | -100% | |
| 65Notable | INSMED Inc | Roger Adsett Chief Operating Officer | $32M 239,850 shares | -71% | |
| 30Weak | INSMED Inc | Martina Flammer M.D. Chief Medical Officer | $3.5M 27,173 shares | -31% | |
| 23Weak | INSMED Inc | William Lewis Chair and CEO | $1.1M 10,700 shares | -4% | |
| 23Weak | INSMED Inc | William Lewis Chair and CEO | $1.3M 10,699 shares | -4% | |
| 25Weak | INSMED Inc | Martina Flammer M.D. Chief Medical Officer | $1.4M 12,302 shares | -17% | |
| 30Weak | INSMED Inc | William Lewis Chair and CEO | $2.2M 21,398 shares | -8% | |
| 21Weak | INSMED Inc | Michael Alexander Smith Chief Legal Officer | $173k 1,806 shares | -5% | |
| 40Moderate | INSMED Inc | William Lewis Chair and CEO | $613k 6,515 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.