ALKERMES PLC ALKS
SHS · Common Stock · CUSIP G01767105
- SectorHealth care
- IndustryPharmaceutical Preparations
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($9.5m this quarter). Holder counts are more reliable. Shares outstanding: 166.1m as of 2023-04-21, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $28.19. Options: 13 managers hold calls ($44.7m notional), 8 hold puts ($5.5m).
Trends to Q1 2023
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 275 |
| Q4 2022 | 279 |
| Q1 2023 | 270 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 142 | 120 |
| Q1 2023 | 127 | 131 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2022 | $11.9m | $16.0m | 1.34 |
| Q4 2022 | $35.7m | $71.7m | 2.01 |
| Q1 2023 | $44.7m | $5.5m | 0.12 |
Biggest buyers
| Deep Track Capital, LP | New | +3.0m |
| VIKING GLOBAL INVESTORS LP | New | +2.8m |
| PICTET ASSET MANAGEMENT SA | Added | +2.0m |
| FMR LLC | Added | +1.5m |
| WELLINGTON MANAGEMENT GROUP LLP | Added | +666.0k |
| Polar Capital Holdings Plc | Added | +636.6k |
| BANK OF AMERICA CORP /DE/ | Added | +499.2k |
| SEGALL BRYANT & HAMILL, LLC | Added | +477.4k |
| Hardman Johnston Global Advisors LLC | Added | +451.6k |
| LOOMIS SAYLES & CO L P | New | +331.0k |
Biggest sellers
| CITADEL ADVISORS LLC | Reduced | -2.9m |
| Balyasny Asset Management L.P. | Reduced | -976.9k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -909.4k |
| JUPITER ASSET MANAGEMENT LTD | Sold out | -771.3k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -705.6k |
| STATE STREET CORP | Reduced | -672.4k |
| PRIMECAP MANAGEMENT CO/CA/ | Reduced | -605.0k |
| VIRGINIA RETIREMENT SYSTEMS ET Al | Sold out | -580.2k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Reduced | -579.2k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Reduced | -574.7k |
Biggest calls
| Caption Management, LLC | New | $21.1m750.0k shares |
| UBS Group AG | Unchanged | $7.7m272.9k shares |
| JANE STREET GROUP, LLC | Reduced | $3.6m128.5k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $3.4m119.2k shares |
| BANK OF MONTREAL /CAN/ | Reduced | $2.8m99.9k shares |
| SIMPLEX TRADING, LLC | Added | $1.8m62.4k shares |
| CITADEL ADVISORS LLC | Reduced | $1.4m50.0k shares |
| GROUP ONE TRADING LLC | Added | $1.1m38.2k shares |
| Walleye Trading LLC | New | $916.2k32.5k shares |
| WOLVERINE TRADING, LLC | Added | $487.0k17.5k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $1.8m65.6k shares |
| JANE STREET GROUP, LLC | Added | $1.1m38.0k shares |
| CITADEL ADVISORS LLC | Reduced | $797.8k28.3k shares |
| SIMPLEX TRADING, LLC | Added | $687.0k24.4k shares |
| GROUP ONE TRADING LLC | Added | $608.9k21.6k shares |
| CITIGROUP INC | Reduced | $422.9k15.0k shares |
| Walleye Trading LLC | Unchanged | $73.3k2.6k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution filed 2025-04-28 | 15.8% |
| BAKER BROS. ADVISORS LP 13G · institution new · filed 2026-02-17 | 6.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-28 | 5.8% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-28 | 5.2% |
| STATE STREET CORP 13G · institution +0.3 pts · filed 2025-11-10 | 5.2% |
Fell to 5% or below in the last year: PRICE T ROWE ASSOCIATES INC /MD/ (2.8%, 2026-05-15), VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC)
Insider purchases and sales in Q1 2023
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2021 | 0 | — | 0 | — | — |
| Q3 2021 | 0 | — | 0 | — | — |
| Q4 2021 | 0 | — | 0 | — | — |
| Q1 2022 | 1 | $10.0k | 1 | $354.7k | — |
| Q2 2022 | 0 | — | 5 | $15.7m | — |
| Q3 2022 | 0 | — | 0 | — | — |
| Q4 2022 | 1 | $815.9k | 0 | — | — |
| Q1 2023 | 0 | — | 0 | — | — |
None reported in Q1 2023.
Holders, Q1 2023
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.01% of their portfolio | 18.6m $524.6m | Added +69.1k |
| BlackRock Inc. 0.01% of their portfolio | 16.6m $468.6m | Added +197.1k |
| Sarissa Capital Management LP 32.32% of their portfolio | 9.0m $252.7m | Unchanged |
| WELLINGTON MANAGEMENT GROUP LLP 0.04% of their portfolio | 6.7m $189.2m | Added +666.0k |
| Hardman Johnston Global Advisors LLC 5.54% of their portfolio | 6.0m $169.5m | Added +451.6k |
| STATE STREET CORP 0.01% of their portfolio | 5.8m $163.1m | Reduced -672.4k |
| CIBC WORLD MARKETS CORP 2.35% of their portfolio | 5.1m $143.1m | Unchanged |
| RENAISSANCE TECHNOLOGIES LLC 0.18% of their portfolio | 4.9m $139.2m | Reduced -705.6k |
| PRIMECAP MANAGEMENT CO/CA/ 0.10% of their portfolio | 4.2m $118.3m | Reduced -605.0k |
| WESTFIELD CAPITAL MANAGEMENT CO LP 0.71% of their portfolio | 3.6m $100.8m | Added +189.0k |
| CITADEL ADVISORS LLC 0.11% of their portfolio | 3.5m $98.2m | Reduced -2.9m |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 3.2m $89.5m | Added +130.3k |
| Deep Track Capital, LP 3.60% of their portfolio | 3.0m $84.6m | New |
| Polar Capital Holdings Plc 0.60% of their portfolio | 2.9m $81.4m | Added +636.6k |
| VIKING GLOBAL INVESTORS LP 0.37% of their portfolio | 2.8m $78.4m | New |
| PICTET ASSET MANAGEMENT SA 0.10% of their portfolio | 2.8m $78.2m | Added +2.0m |
| Holocene Advisors, LP 0.39% of their portfolio | 2.8m $77.9m | Added +120.6k |
| ARMISTICE CAPITAL, LLC 1.79% of their portfolio | 2.7m $76.8m | Reduced -176.0k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 2.7m $74.9m | Added +158.7k |
| MILLENNIUM MANAGEMENT LLC 0.08% of their portfolio | 2.5m $71.0m | Reduced -909.4k |
| PUTNAM INVESTMENTS LLC 0.11% of their portfolio | 2.4m $68.4m | Reduced -419.2k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 2.2m $61.1m | Added +17.7k |
| FMR LLC 0.00% of their portfolio | 2.1m $60.2m | Added +1.5m |
| Nuveen Asset Management, LLC 0.02% of their portfolio | 2.0m $56.3m | Added +153.0k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio | 1.9m $54.9m | Reduced -22.2k |
| FIRST TRUST ADVISORS LP 0.06% of their portfolio | 1.9m $54.1m | Reduced -88.4k |
| Artisan Partners Limited Partnership 0.09% of their portfolio | 1.9m $53.4m | Reduced -26.2k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 1.6m $46.1m | Added +18.9k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 1.5m $43.5m | Reduced -27.0k |
| NORGES BANK 0.01% of their portfolio | 1.5m $42.6m | Reduced -186.5k |
| Krensavage Asset Management, LLC 11.95% of their portfolio | 1.4m $39.3m | Reduced -6.0k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 1.3m $37.8m | Reduced -524.6k |
| TWO SIGMA ADVISERS, LP 0.10% of their portfolio | 1.3m $36.9m | Reduced -184.1k |
| JACOBS LEVY EQUITY MANAGEMENT, INC 0.22% of their portfolio | 1.3m $36.7m | Reduced -142.5k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 1.2m $33.9m | Added +499.2k |
| SEGALL BRYANT & HAMILL, LLC 0.30% of their portfolio | 988.6k $27.9m | Added +477.4k |
| PANAGORA ASSET MANAGEMENT INC 0.15% of their portfolio | 820.3k $23.1m | Added +26.7k |
| EAGLE ASSET MANAGEMENT INC 0.13% of their portfolio | 802.3k $22.6m | Added +161.4k |
| California Public Employees Retirement System 0.02% of their portfolio | 790.7k $22.3m | Added +285.4k |
| Balyasny Asset Management L.P. 0.07% of their portfolio | 786.1k $22.2m | Reduced -976.9k |
| TEACHER RETIREMENT SYSTEM OF TEXAS 0.15% of their portfolio | 783.6k $22.1m | Reduced -211.9k |
| Hood River Capital Management LLC 0.67% of their portfolio | 731.6k $20.6m | Added +45.7k |
| EMERALD ADVISERS, LLC 0.95% of their portfolio | 699.5k $19.7m | Added +60.1k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.02% of their portfolio | 677.9k $19.1m | Reduced -574.7k |
| Connor, Clark & Lunn Investment Management Ltd. 0.10% of their portfolio | 638.8k $18.0m | Reduced -680 |
| Palo Alto Investors LP 1.41% of their portfolio | 603.4k $17.0m | Unchanged |
| INTERNATIONAL BIOTECHNOLOGY TRUST PLC 4.66% of their portfolio | 593.0k $16.7m | Unchanged |
| MORGAN STANLEY 0.00% of their portfolio | 574.6k $16.2m | Reduced -277.3k |
| EMERALD MUTUAL FUND ADVISERS TRUST 0.95% of their portfolio | 568.3k $16.0m | Added +185.8k |
| GLENMEDE TRUST CO NA 0.08% of their portfolio | 491.7k $13.9m | Added +5.8k |
| TWO SIGMA INVESTMENTS, LP 0.04% of their portfolio | 473.6k $13.4m | Reduced -426.8k |
| ALLIANCEBERNSTEIN L.P. 0.01% of their portfolio | 450.0k $12.7m | Added +254.4k |
| D. E. Shaw & Co., Inc. 0.02% of their portfolio | 444.3k $12.5m | Reduced -127.1k |
| Invesco Ltd. 0.00% of their portfolio | 429.3k $12.1m | Reduced -45.2k |
| MACQUARIE GROUP LTD 0.01% of their portfolio | 423.1k $11.9m | Unchanged |
| Ensign Peak Advisors, Inc 0.02% of their portfolio | 405.4k $11.4m | Unchanged |
| Price Jennifer C. 3.24% of their portfolio | 360.6k $10.2m | Unchanged |
| Cubist Systematic Strategies, LLC 0.09% of their portfolio | 359.0k $10.1m | Added +171.5k |
| Swiss National Bank 0.01% of their portfolio | 354.7k $10.0m | Reduced -41.9k |
| FULLER & THALER ASSET MANAGEMENT, INC. 0.06% of their portfolio | 340.5k $9.6m | Added +24.5k |
| AXA S.A. 0.03% of their portfolio | 339.0k $9.6m | Added +10.5k |
| LOOMIS SAYLES & CO L P 0.02% of their portfolio | 331.0k $9.3m | New |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 321.4k $9.1m | Added +46.9k |
| Prosight Management, LP 4.27% of their portfolio | 316.2k $8.9m | Reduced -25.4k |
| Legal & General Group Plc 0.00% of their portfolio | 314.0k $8.9m | Added +8.5k |
| Tekla Capital Management LLC 0.33% of their portfolio | 309.6k $8.7m | Unchanged |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 302.8k $8.5m | Added +181.1k |
| Point72 Asset Management, L.P. 0.03% of their portfolio | 299.6k $8.4m | Added +62.9k |
| BARCLAYS PLC 0.01% of their portfolio | 280.4k $7.9m | Reduced -37.4k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.04% of their portfolio | 280.0k $7.9m | Reduced -579.2k |
| 13D Management LLC 3.95% of their portfolio | 276.1k $7.8m | Reduced -107.5k |
| Rafferty Asset Management, LLC 0.05% of their portfolio | 255.7k $7.2m | Reduced -72.3k |
| Thrivent Financial for Lutherans 0.02% of their portfolio | 249.2k $7.0m | Unchanged |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 242.2k $6.8m | Added +24.1k |
| CAPITAL FUND MANAGEMENT S.A. 0.13% of their portfolio | 241.0k $6.8m | Reduced -134.7k |
| VOYA INVESTMENT MANAGEMENT LLC 0.01% of their portfolio | 235.0k $6.6m | Reduced -122 |
| SECTORAL ASSET MANAGEMENT INC 1.25% of their portfolio | 231.1k $6.5m | Reduced -800 |
| Soleus Capital Management, L.P. 0.80% of their portfolio | 230.0k $6.5m | New |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 229.3k $6.5m | Added +1.2k |
| CITIGROUP INC 0.01% of their portfolio | 225.5k $6.4m | Added +62.1k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 221.3k $6.2m | Added +13.0k |
| CREDIT SUISSE AG/ 0.01% of their portfolio | 217.4k $6.1m | Added +9.5k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 213.4k $6.0m | Added +23.9k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 205.0k $5.8m | Reduced -3.1k |
| Brookfield Corp /ON/ 0.02% of their portfolio | 203.4k $5.7m | Reduced -446.4k |
| ALGERT GLOBAL LLC 0.26% of their portfolio | 195.7k $5.5m | Added +18.8k |
| Schonfeld Strategic Advisors LLC 0.05% of their portfolio | 192.8k $5.4m | Added +45.7k |
| Integral Health Asset Management, LLC 1.05% of their portfolio | 179.0k $5.0m | New |
| Hillsdale Investment Management Inc. 0.41% of their portfolio | 170.7k $4.8m | Added +1.3k |
| BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio | 164.1k $4.6m | Added +4.4k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 160.3k $4.5m | Reduced -34.5k |
| ExodusPoint Capital Management, LP 0.05% of their portfolio | 159.5k $4.5m | Added +26.7k |
| S&CO INC 0.37% of their portfolio | 153.0k $4.3m | Unchanged |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 151.6k $4.3m | Reduced -13.3k |
| Rhenman & Partners Asset Management AB 0.41% of their portfolio | 135.0k $3.8m | Reduced -15.0k |
| AQR CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 134.8k $3.8m | Reduced -60.2k |
| Fisher Asset Management, LLC 0.00% of their portfolio | 127.9k $3.6m | Reduced -3.5k |
| AGF MANAGEMENT LTD 0.02% of their portfolio | 126.8k $3.6m | Reduced -14.6k |
| FEDERATED HERMES, INC. 0.01% of their portfolio | 120.8k $3.4m | Added +37.1k |
| MARSHALL WACE, LLP 0.01% of their portfolio | 113.4k $3.2m | Unchanged |