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Insmed stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions−38.4% to $114.41
Insmed (INSM) stock fell 38% over the last 252 sessions, to $114.41. On the way it reported 4 quarters, its insiders filed 3 open-market trades and 10 Form 144 notices of planned sales, and the company filed 3 material 8-Ks. Each is marked on the price and listed with what the stock did next.
Each mark, and what followed
| Date | Kind | What | Next session | 5 sessions | 21 sessions |
|---|---|---|---|---|---|
| Nov 3, 2026 | Form 144 | Form 144: Sara Bonstein plans to sell $1.1M | −4.6% (−4.9% vs SPY) | — | — |
| Oct 29, 2026 | Earnings | Earnings: missed the EPS estimate by -23.7% | +14.0% (+14.4% vs SPY) | +12.6% (+13.3% vs SPY) | — |
| Oct 20, 2026 | 8-K | Directors and officers: departures, appointments, pay | +0.4% (+0.1% vs SPY) | −2.1% (−1.9% vs SPY) | — |
| Oct 5, 2026 | 8-K | Directors and officers: departures, appointments, pay | −6.8% (−7.5% vs SPY) | −10.0% (−11.1% vs SPY) | −1.7% (+0.7% vs SPY) |
| Sep 9, 2026 | Form 144 | Form 144: David R Brennan plans to sell $3.1M | +3.1% (+3.6% vs SPY) | −4.1% (−2.9% vs SPY) | −20.5% (−22.2% vs SPY) |
| Sep 9, 2026 | Insider sale | Brennan David R sold $3.1M | +3.1% (+3.6% vs SPY) | −4.1% (−2.9% vs SPY) | −20.5% (−22.2% vs SPY) |
| Aug 17, 2026 | Form 144 | Form 144: Melvin Sharoky plans to sell $638K | +3.6% (+4.1% vs SPY) | +1.6% (+3.0% vs SPY) | −3.1% (−0.7% vs SPY) |
| Aug 17, 2026 | Insider sale | Sharoky Melvin Md sold $638K | +3.6% (+4.1% vs SPY) | +1.6% (+3.0% vs SPY) | −3.1% (−0.7% vs SPY) |
| Aug 10, 2026 | Form 144 | Form 144: Roger Adsett plans to sell $32.0M | +2.7% (+2.8% vs SPY) | −5.8% (−6.2% vs SPY) | −4.8% (−3.9% vs SPY) |
| Aug 10, 2026 | Insider sale | Adsett Roger sold $32.0M | +2.7% (+2.8% vs SPY) | −5.8% (−6.2% vs SPY) | −4.8% (−3.9% vs SPY) |
| Aug 6, 2026 | Earnings | Earnings: beat the EPS estimate by 91.2% | +29.2% (+29.3% vs SPY) | +29.0% (+28.6% vs SPY) | +24.7% (+24.2% vs SPY) |
| Aug 6, 2026 | Form 144 | Form 144: Martina Flammer plans to sell $3.5M | +29.2% (+29.3% vs SPY) | +29.0% (+28.6% vs SPY) | +24.7% (+24.2% vs SPY) |
| Jul 23, 2026 | Form 144 | Form 144: William Lewis plans to sell $1.1M | +0.7% (+2.0% vs SPY) | −3.3% (−0.9% vs SPY) | +16.0% (+13.9% vs SPY) |
| Jul 9, 2026 | Form 144 | Form 144: William Lewis plans to sell $1.3M | +1.5% (+0.6% vs SPY) | −5.9% (−7.2% vs SPY) | +12.9% (+9.8% vs SPY) |
| Jul 6, 2026 | Form 144 | Form 144: Martina Flammer plans to sell $1.4M | −0.1% (−0.9% vs SPY) | +3.5% (+2.2% vs SPY) | −12.5% (−14.2% vs SPY) |
| Jun 25, 2026 | Form 144 | Form 144: William Lewis plans to sell $2.2M | +1.0% (+0.8% vs SPY) | +3.4% (+1.7% vs SPY) | +3.3% (+2.5% vs SPY) |
| Jun 22, 2026 | Form 144 | Form 144: Michael Smith plans to sell $173K | +2.9% (+3.2% vs SPY) | +7.6% (+10.0% vs SPY) | +12.6% (+12.4% vs SPY) |
| May 7, 2026 | Earnings | Earnings: beat the EPS estimate by 23.9% | −26.7% (−26.4% vs SPY) | −15.0% (−16.1% vs SPY) | −37.5% (−38.0% vs SPY) |
| Feb 19, 2026 | 8-K | Directors and officers: departures, appointments, pay | +6.3% (+6.6% vs SPY) | −1.7% (−2.7% vs SPY) | −4.8% (−0.9% vs SPY) |
| Feb 19, 2026 | Earnings | Earnings: missed the EPS estimate by -31.9% | +6.3% (+6.6% vs SPY) | −1.7% (−2.7% vs SPY) | −4.8% (−0.9% vs SPY) |
Insiders’ record here
In the year on the chart, Insmed's insiders reported 0 open-market buys ($0) and 3 sales ($35.7M).
Across the whole universe (19,782 scored trades), insider buys beat the market 46% of the time and sales were followed by a lagging stock 61% of the time; buys of $1M or more 39%. Every pattern →
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Report card: every quarter against the estimate → Insmed: every quarter → Live insider trades →
Prices are daily closes; filings and trades are as filed with the SEC (Form 4 within two business days of the trade, 8-K within four of the event). Moves after a mark are the stock's close-to-close change and the same for SPY; they describe the record, not what the next one will do. Not investment advice.