Alkermes plc.
Total Trades
69
Buys
2
Sells
39
Largest Trade
N/A
Insiders
12
Institutional Funds
293
Inst. Value
$1M+
Activist Filings
20
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Parisi Samuel Joseph | VP | SELL | $100K–$500K | 7K | $29.29 | Mar 5, 2026 |
| Nichols Christian Todd | SVP | SELL | $100K–$500K | 6K | $30.00 | Mar 5, 2026 |
| Hopkinson Craig C. | EVP R&D | SELL | $100K–$500K | 9K | $29.72 | Mar 5, 2026 |
| Hopkinson Craig C. | EVP R&D | EXERCISE | $50K–$100K | 5K | $19.34 | Mar 5, 2026 |
| Gaffin David Joseph | EVP | SELL | $100K–$500K | 4K | $29.52 | Mar 5, 2026 |
| Hopkinson Craig C. | EVP R&D | SELL | $100K–$500K | 9K | $33.93 | Feb 3, 2026 |
| Hopkinson Craig C. | EVP R&D | EXERCISE | $50K–$100K | 5K | $19.34 | Feb 3, 2026 |
| Cooke Shane | Director | SELL | $1M+ | 61K | $34.57 | Feb 3, 2026 |
| Cooke Shane | Director | EXERCISE | $1M+ | 61K | $31.64 | Feb 3, 2026 |
| Hopkinson Craig C. | EVP R&D | EXERCISE | $50K–$100K | 5K | $19.34 | Jan 8, 2026 |
| Hopkinson Craig C. | EVP R&D | SELL | $100K–$500K | 5K | $30.00 | Jan 8, 2026 |
| Hopkinson Craig C. | EVP R&D | SELL | $100K–$500K | 4K | $28.00 | Jan 2, 2026 |
| Hopkinson Craig C. | EVP R&D | SELL | $100K–$500K | 4K | $30.00 | Dec 5, 2025 |
| Hopkinson Craig C. | EVP R&D | EXERCISE | $50K–$100K | 4K | $19.34 | Dec 5, 2025 |
| Hopkinson Craig C. | EVP R&D | SELL | $100K–$500K | 4K | $29.30 | Dec 1, 2025 |
| Hopkinson Craig C. | EVP R&D | SELL | $100K–$500K | 9K | $30.38 | Nov 3, 2025 |
| Hopkinson Craig C. | EVP R&D | EXERCISE | $50K–$100K | 5K | $19.34 | Nov 3, 2025 |
| Nichols Christian Todd | SVP | SELL | $100K–$500K | 7K | $31.52 | Jun 10, 2025 |
| Parisi Samuel Joseph | VP | SELL | $50K–$100K | 2K | $34.00 | Feb 28, 2025 |
| Parisi Samuel Joseph | VP | EXERCISE | N/A | 3K | — | Feb 28, 2025 |
| Parisi Samuel Joseph | VP | SELL | $100K–$500K | 4K | $35.26 | Feb 25, 2025 |
| Parisi Samuel Joseph | VP | EXERCISE | N/A | 5K | — | Feb 25, 2025 |
| Parisi Samuel Joseph | VP | EXERCISE | N/A | 2K | — | Feb 20, 2025 |
| Parisi Samuel Joseph | VP | SELL | $15K–$50K | 1K | $35.69 | Feb 20, 2025 |
| Hopkinson Craig C. | EVP R&D | SELL | $1M+ | 101K | $32.05 | Feb 1, 2025 |
| Hopkinson Craig C. | EVP R&D | EXERCISE | $1M+ | 98K | $22.22 | Feb 1, 2025 |
| Hopkinson Craig C. | EVP R&D | SELL | $100K–$500K | 14K | $30.77 | Dec 4, 2024 |
| Nichols Christian Todd | SVP | SELL | $100K–$500K | 5K | $29.15 | Nov 27, 2024 |
| Hopkinson Craig C. | EVP R&D | SELL | $1M+ | 59K | $30.08 | Nov 12, 2024 |
| Hopkinson Craig C. | EVP R&D | EXERCISE | $500K+ | 43K | $20.03 | Nov 12, 2024 |
| Hopkinson Craig C. | EVP R&D | SELL | $100K–$500K | 10K | $29.53 | Nov 7, 2024 |
| Parisi Samuel Joseph | VP | EXERCISE | N/A | 2K | — | Feb 27, 2024 |
| Parisi Samuel Joseph | VP | SELL | $50K–$100K | 3K | $29.65 | Feb 27, 2024 |
| LAURENCIN CATO T | Director | SELL | $50K–$100K | 3K | $31.85 | Feb 16, 2024 |
| LAURENCIN CATO T | Director | EXERCISE | $50K–$100K | 3K | $22.52 | Feb 16, 2024 |
| LAURENCIN CATO T | Director | EXERCISE | $50K–$100K | 3K | $22.97 | Jun 8, 2023 |
| LAURENCIN CATO T | Director | SELL | $50K–$100K | 3K | $31.85 | Jun 8, 2023 |
| LAURENCIN CATO T | Director | SELL | $50K–$100K | 3K | $31.50 | Jun 7, 2023 |
| LAURENCIN CATO T | Director | EXERCISE | $50K–$100K | 3K | $22.97 | Jun 7, 2023 |
| Nichols Christian Todd | SVP | SELL | $500K+ | 27K | $28.93 | May 31, 2023 |
| Nichols Christian Todd | SVP | EXERCISE | $100K–$500K | 20K | $20.43 | May 31, 2023 |
| Wysenski Nancy | Director | SELL | $1M+ | 41K | $31.24 | May 10, 2023 |
| Wysenski Nancy | Director | EXERCISE | $1M+ | 41K | $31.13 | May 10, 2023 |
| Daglio David Angelo Jr. | Director | BUY | $500K+ | 35K | $23.31 | Nov 16, 2022 |
| Nichols Christian Todd | SVP | SELL | $100K–$500K | 7K | $28.26 | Jun 21, 2022 |
| LANDINE MICHAEL J | SVP | SELL | $1M+ | 50K | $29.15 | May 19, 2022 |
| LANDINE MICHAEL J | SVP | EXERCISE | $500K+ | 50K | $16.55 | May 19, 2022 |
| LANDINE MICHAEL J | SVP | SELL | $500K+ | 25K | $27.22 | May 12, 2022 |
| LANDINE MICHAEL J | SVP | EXERCISE | $100K–$500K | 25K | $16.55 | May 12, 2022 |
| POPS RICHARD F | Director and CEO | EXERCISE | $1M+ | 450K | $16.55 | May 6, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 293 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| STATE STREET CORP | 9.5M | $1M+ | SH |
| RENAISSANCE TECHNOLOGIES LLC | 6.7M | $1M+ | SH |
| AMERICAN CENTURY COMPANIES INC | 6.0M | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 4.0M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 3.5M | $1M+ | SH |
| PRIMECAP MANAGEMENT CO/CA/ | 2.6M | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 2.2M | $1M+ | SH |
| Deep Track Capital, LP | 2.0M | $1M+ | SH |
| NORGES BANK | 1.9M | $1M+ | SH |
| Pictet Asset Management Holding SA | 1.5M | $1M+ | SH |
| FIRST TRUST ADVISORS LP | 1.5M | $1M+ | SH |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.5M | $1M+ | SH |
| LOOMIS SAYLES & CO L P | 1.4M | $1M+ | SH |
| Soleus Capital Management, L.P. | 1.3M | $1M+ | SH |
| Squarepoint Ops LLC | 1.1M | $1M+ | SH |
| Affinity Asset Advisors, LLC | 1.0M | $1M+ | SH |
| VIRGINIA RETIREMENT SYSTEMS ET Al | 976K | $1M+ | SH |
| PRINCIPAL FINANCIAL GROUP INC | 939K | $1M+ | SH |
| PANAGORA ASSET MANAGEMENT INC | 929K | $1M+ | SH |
| Frazier Life Sciences Management, L.P. | 701K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G · Feb 17, 2026
6.1%
10.0M shares
SC 13G · Nov 10, 2025
5.2%
8.5M shares
T. Rowe Price Associates, Inc.
SC 13G/A · Aug 14, 2025
6.1%
10.0M shares
SC 13G · May 13, 2025
4.9%
8.0M shares
SC 13G/A · Apr 28, 2025
15.8%
25.6M shares
Wellington Management Group LLP
SC 13G/A · Feb 10, 2025
4.3%
7.0M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G · Nov 14, 2024
7.9%
13.0M shares
SC 13G/A · Nov 12, 2024
11.5%
19.0M shares
Wellington Management Group LLP
SC 13G/A · Nov 8, 2024
7.7%
12.7M shares
SC 13G · Nov 4, 2024
11.5%
19.0M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
12.6%
21.0M shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G · Jan 24, 2024
5.6%
0 shares
SC 13D/A · Aug 24, 2023
5.0%
8.3M shares
SC 13D/A · Jun 5, 2023
8.4%
14.0M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Feb 14, 2023
0.9%
1.6M shares
SC 13D/A · Oct 7, 2022
8.6%
14.0M shares
SC 13D/A · Jul 6, 2022
8.6%
14.0M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Jun 10, 2022
7.9%
13.0M shares
T. ROWE PRICE ASSOCIATES, INC. 52-0556948
SC 13G/A · Feb 14, 2022
13.1%
21.3M shares
SC 13D/A · Jan 10, 2022
8.7%
14.0M shares