Alexander Cumbo sold $55k of SLDB
President and CEO at Solid Biosciences Inc.. 10,808 shares at an average of $5.11, traded Dec 3, 2025, filed Dec 4, 2025.
Score components
- +25RoleCEO
- +7Trade size$55k at market
- +5Share of holdings soldSold 12% of holdings
- +15Cluster4 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.
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 0001193125-25-308115, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Dec 2, 2025 | MOption exercise Common Stock10b5-1 | +28,612 | - | - | 92,196 | Dec 4, 2025 |
| Dec 3, 2025 | SOpen-market sale Common Stock10b5-1 | -10,808 | $5.11 | $55k | 81,388 | Dec 4, 2025 |
| Dec 2, 2025 | MOption exercise Restricted Stock Unitsderivative10b5-1 | -28,612 | $0.00 | $0 | 28,613 | Dec 4, 2025 |
Related signals
Other insiders at Solid Biosciences Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 0Weak | Solid Biosciences Inc. | Jessie Hanrahan Chief Regulatory Officer | $23k 4,483 shares | -14% | |
| 0Weak | Solid Biosciences Inc. | Paul Herzich Chief Technology Officer | $14k 2,701 shares | -9% | |
| 10Weak | Solid Biosciences Inc. | David T Howton Chief Operating Officer | $25k 4,932 shares | -13% | |
| 15Weak | SLDBsell Solid Biosciences Inc. | Ilan Ganot director | $14k 3,278 shares | -3% | |
| 0Weak | SLDBsell Solid Biosciences Inc. | Gabriel Brooks Chief Medical Officer | $17k 2,895 shares | -8% | |
| 25Weak | SLDBbuy Solid Biosciences Inc. | Clare Kahn director | $9,924 1,860 shares | +169% | |
| 53Moderate | Solid Biosciences Inc. | Bain Capital Life Sciences Investors, LLC owner | $4.0M 1,000,000 shares | +25% | |
| 65Notable | Solid Biosciences Inc. | Perceptive Advisors LLC director, owner | $20M 5,000,000 shares | +73% | |
| 50Moderate | Solid Biosciences Inc. | Adage Capital Management, L.P. owner | $1.9M 252,545 shares | +6% | |
| 0Weak | Solid Biosciences Inc. | Gabriel Brooks Chief Medical Officer | $13k 3,256 shares | -12% |
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.