🕵️ Alkermes PLC. ($ALKS)
SEC insider & ownership activity, last 12 months · CIK 1520262 · every row links its SEC filing
Over the last 12 months insiders sold $10.5M with no open-market buying against it. Craig C. Hopkinson sold $3.9M through a program of 14 sale notices averaging $281K (Oct–Sep). State Street Corporation added 4.9% → 5.2%. No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 7 sellers, $10.5M (33 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Craig C. Hopkinson | 0 | – | 16 | $3.9M | Sep 1, 2026 |
| Snyderman Nancy Lynn Md | 0 | – | 1 | $2.2M | Aug 3, 2026 |
| Cooke Shane | 0 | – | 2 | $2.1M | Feb 2, 2026 |
| Parisi Samuel Joseph | 0 | – | 2 | $889K | May 29, 2026 |
| Gaffin David Joseph | 0 | – | 8 | $652K | Sep 3, 2026 |
| Nichols Christian Todd | 0 | – | 3 | $553K | Aug 17, 2026 |
| Christopher I. Wright | 0 | – | 1 | $90K | Jun 12, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| BlackRock, Inc. | 15.8% | 13G | Apr 28, 2025 | filing ↗ | |
| Baker BROS. Advisors LP | 6.1% | 13G | Feb 17, 2026 | filing ↗ | |
| Baker BROS. Advisors (GP) LLC | 6.1% | 13G | Feb 17, 2026 | filing ↗ | |
| Julian C. Baker | 6.1% | 13G | Feb 17, 2026 | filing ↗ | |
| Felix J. Baker | 6.1% | 13G | Feb 17, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 5.8% | 13G | Apr 28, 2026 | filing ↗ | |
| Vanguard Capital Management | 5.2% | 13G | Apr 28, 2026 | filing ↗ | |
| State Street Corporation | 5.2% | 13G | Nov 10, 2025 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Gaffin David Joseph | $98K | Sep 3, 2026 | filing ↗ |
| Craig C. Hopkinson | $423K | Sep 1, 2026 | filing ↗ |
| Nichols Christian Todd | $373K | Aug 17, 2026 | filing ↗ |
| Snyderman Nancy Lynn Md | $2.2M | Aug 3, 2026 | filing ↗ |
| Gaffin David Joseph | $99K | Aug 3, 2026 | filing ↗ |
| Craig C. Hopkinson | $437K | Aug 3, 2026 | filing ↗ |
| Gaffin David Joseph | $110K | Jul 6, 2026 | filing ↗ |
| Craig C. Hopkinson | $464K | Jul 1, 2026 | filing ↗ |
| Christopher I. Wright | $90K | Jun 12, 2026 | filing ↗ |
| Gaffin David Joseph | $88K | Jun 4, 2026 | filing ↗ |
| Craig C. Hopkinson | $375K | Jun 1, 2026 | filing ↗ |
| Gaffin David Joseph | $68K | May 4, 2026 | filing ↗ |
| Craig C. Hopkinson | $301K | May 1, 2026 | filing ↗ |
| Gaffin David Joseph | $70K | Apr 6, 2026 | filing ↗ |
| Craig C. Hopkinson | $320K | Apr 1, 2026 | filing ↗ |
| Gaffin David Joseph | $61K | Mar 3, 2026 | filing ↗ |
| Nichols Christian Todd | $180K | Mar 2, 2026 | filing ↗ |
| Gaffin David Joseph | $60K | Mar 2, 2026 | filing ↗ |
| Craig C. Hopkinson | $267K | Mar 2, 2026 | filing ↗ |
| Cooke Shane | $2.1M | Feb 2, 2026 | filing ↗ |
| Craig C. Hopkinson | $305K | Feb 2, 2026 | filing ↗ |
| Craig C. Hopkinson | $150K | Jan 8, 2026 | filing ↗ |
| Craig C. Hopkinson | $112K | Jan 2, 2026 | filing ↗ |
| Craig C. Hopkinson | $112K | Dec 3, 2025 | filing ↗ |
| Craig C. Hopkinson | $117K | Dec 1, 2025 | filing ↗ |
| Craig C. Hopkinson | $273K | Nov 3, 2025 | filing ↗ |
| Craig C. Hopkinson | $284K | Oct 15, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Sep 14, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 14, 2026 | filing ↗ |
| Material agreement (1.01) | Aug 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 12, 2026 | filing ↗ |
| Earnings (2.02) | Jul 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 28, 2026 | filing ↗ |
| Agreement terminated (1.02) | Jul 6, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 15, 2026 | filing ↗ |
| Other events (8.01) | Jun 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 15, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 20, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 20, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 20, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 12, 2026 | filing ↗ |
| Other events (8.01) | May 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 12, 2026 | filing ↗ |
| Earnings (2.02) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Earnings (2.02) | Feb 25, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 25, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 24, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 24, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 12, 2026 | filing ↗ |
| Material agreement (1.01) | Feb 12, 2026 | filing ↗ |
| Agreement terminated (1.02) | Feb 12, 2026 | filing ↗ |
| Acquisition or disposition (2.01) | Feb 12, 2026 | filing ↗ |
| New financial obligation (2.03) | Feb 12, 2026 | filing ↗ |