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Alkermes stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+44.9% to $45.90
Alkermes (ALKS) stock rose 45% over the last 252 sessions, to $45.90. On the way it reported 4 quarters, its insiders filed 2 open-market trades and 10 Form 144 notices of planned sales, and the company filed 8 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 | Earnings | Earnings: beat the EPS estimate by 130.9% | +1.8% (+1.5% vs SPY) | — | — |
| Nov 3, 2026 | Form 144 | Form 144: David Gaffin plans to sell $94K | +1.8% (+1.5% vs SPY) | — | — |
| Oct 2, 2026 | Form 144 | Form 144: David Gaffin plans to sell $83K | +2.9% (+2.2% vs SPY) | −1.1% (−2.4% vs SPY) | +11.2% (+12.3% vs SPY) |
| Sep 16, 2026 | 8-K | Directors and officers: departures, appointments, pay | +0.1% (+0.5% vs SPY) | −6.1% (−8.5% vs SPY) | −16.4% (−18.2% vs SPY) |
| Sep 3, 2026 | Form 144 | Form 144: David Gaffin plans to sell $98K | −1.8% (−2.8% vs SPY) | −3.4% (−2.5% vs SPY) | −13.4% (−14.2% vs SPY) |
| Sep 1, 2026 | Form 144 | Form 144: Craig Hopkinson plans to sell $423K | +0.5% (+1.1% vs SPY) | −3.2% (−3.1% vs SPY) | −14.8% (−14.5% vs SPY) |
| Aug 17, 2026 | Form 144 | Form 144: Christian Todd Nichols plans to sell $373K | +1.6% (+2.1% vs SPY) | −1.5% (−0.1% vs SPY) | −6.4% (−3.9% vs SPY) |
| Aug 12, 2026 | 8-K | Material definitive agreement | +2.2% (+1.9% vs SPY) | +0.6% (+1.0% vs SPY) | −6.5% (−4.8% vs SPY) |
| Aug 3, 2026 | 8-K | Directors and officers: departures, appointments, pay | +0.3% (−1.5% vs SPY) | −0.3% (−2.3% vs SPY) | −4.8% (−5.4% vs SPY) |
| Aug 3, 2026 | Form 144 | Form 144: Craig Hopkinson plans to sell $437K | +1.1% (−0.3% vs SPY) | +0.4% (−3.1% vs SPY) | −4.2% (−6.8% vs SPY) |
| Aug 3, 2026 | Form 144 | Form 144: David Gaffin plans to sell $99K | +1.1% (−0.3% vs SPY) | +0.4% (−3.1% vs SPY) | −4.2% (−6.8% vs SPY) |
| Aug 3, 2026 | Form 144 | Form 144: nancy lynn MD snyderman plans to sell $2.2M | +1.1% (−0.3% vs SPY) | +0.4% (−3.1% vs SPY) | −4.2% (−6.8% vs SPY) |
| Aug 3, 2026 | Insider sale | snyderman nancy lynn MD sold $2.2M | +1.1% (−0.3% vs SPY) | +0.4% (−3.1% vs SPY) | −4.2% (−6.8% vs SPY) |
| Jul 28, 2026 | Earnings | Earnings: beat the EPS estimate by 141.3% | −4.3% (−4.6% vs SPY) | −6.2% (−8.7% vs SPY) | −6.9% (−10.5% vs SPY) |
| Jul 8, 2026 | 8-K | Termination of a material agreement | −1.7% (−1.4% vs SPY) | −6.8% (−7.3% vs SPY) | −10.7% (−13.6% vs SPY) |
| Jul 6, 2026 | Form 144 | Form 144: David Gaffin plans to sell $110K | +1.0% (+0.2% vs SPY) | −5.0% (−6.3% vs SPY) | −9.7% (−11.4% vs SPY) |
| Jul 1, 2026 | Form 144 | Form 144: Craig Hopkinson plans to sell $464K | −1.3% (−1.2% vs SPY) | +3.5% (+3.7% vs SPY) | −4.6% (−3.9% vs SPY) |
| May 29, 2026 | Insider sale | Parisi Samuel Joseph sold $687K | +5.5% (+5.2% vs SPY) | +8.3% (+7.9% vs SPY) | +27.4% (+29.0% vs SPY) |
| May 20, 2026 | 8-K | Directors and officers: departures, appointments, pay | −0.1% (−0.3% vs SPY) | +7.7% (+5.9% vs SPY) | +21.9% (+21.2% vs SPY) |
| May 5, 2026 | Earnings | Earnings: beat the EPS estimate by 1053.0% | +5.9% (+5.1% vs SPY) | +3.7% (+0.8% vs SPY) | +22.4% (+17.5% vs SPY) |
| Feb 25, 2026 | 8-K | Directors and officers: departures, appointments, pay | −7.3% (−8.1% vs SPY) | −13.4% (−12.4% vs SPY) | −12.8% (−8.5% vs SPY) |
| Feb 25, 2026 | Earnings | Earnings: beat the EPS estimate by 7.7% | −7.3% (−8.1% vs SPY) | −13.4% (−12.4% vs SPY) | −12.8% (−8.5% vs SPY) |
| Feb 12, 2026 | 8-K | Material definitive agreement | −4.8% (−3.2% vs SPY) | −8.7% (−7.6% vs SPY) | −22.9% (−18.5% vs SPY) |
| Nov 19, 2025 | 8-K | Material definitive agreement | −2.0% (−2.4% vs SPY) | −0.9% (−3.2% vs SPY) | −5.1% (−7.5% vs SPY) |
Insiders’ record here
In the year on the chart, Alkermes' insiders reported 0 open-market buys ($0) and 2 sales ($2.9M). Of the 2 old enough to score, 1 were followed by the stock doing what the trade implied over the next 63 sessions (beating SPY after a buy, lagging it after a sale); the median excess return after a buy was — and after a sale +10.7%.
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 |
|---|---|---|---|---|---|
| 1.01 Material definitive agreement | 23,525 | 0.0% | 51% | +1.0% | ±1.4% |
| 2.03 New debt or off-balance-sheet obligation | 13,268 | 0.0% | 50% | +1.2% | ±1.3% |
| 1.02 Termination of a material agreement | 2,368 | 0.0% | 51% | +1.1% | ±1.5% |
| 2.01 Completed acquisition or disposition | 2,671 | +0.1% | 52% | +1.2% | ±1.6% |
| 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 → Alkermes: 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.