Vault-13

ALKERMES PLC ALKS

SHS · Common Stock · CUSIP G01767105

275 institutional holders
159,762,295159.8m shares reported held*
97.2% of all shares outstanding*
$3.6bnreported value*

* 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 ($3.8m this quarter). Holder counts are more reliable. Shares outstanding: 164.3m as of 2022-10-28, 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 ≈ $22.33. Options: 11 managers hold calls ($11.9m notional), 10 hold puts ($16.0m).

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP — $2.8m126.2k shares
JANE STREET GROUP, LLC — $2.7m121.2k shares
BANK OF MONTREAL /CAN/ — $2.2m90.0k shares
Parallax Volatility Advisers, L.P. — $945.0k42.3k shares
GROUP ONE TRADING LLC — $855.0k38.3k shares
CITADEL ADVISORS LLC — $784.0k35.1k shares
Caption Management, LLC — $669.0k30.0k shares
TWO SIGMA SECURITIES, LLC — $433.0k19.4k shares
Jefferies Group LLC — $361.7k16.2k shares
SIMPLEX TRADING, LLC — $218.0k9.8k shares

Biggest puts

CITADEL ADVISORS LLC — $11.9m534.9k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP — $1.8m79.7k shares
Caption Management, LLC — $669.0k30.0k shares
JANE STREET GROUP, LLC — $563.0k25.2k shares
Parallax Volatility Advisers, L.P. — $447.0k20.0k shares
Jefferies Group LLC — $426.5k19.1k shares
GROUP ONE TRADING LLC — $159.0k7.1k shares
SIMPLEX TRADING, LLC — $13.0k600 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. — $00 shares
Cutler Group LLC / CA — $0100 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.

HolderStakeChangeShares Last filed
BlackRock, Inc. 13G · institution filed 2025-04-28 15.8% 25.6m≈ $1.3bn 2025-04-28
BAKER BROS. ADVISORS LP 13G · institution new · filed 2026-02-17 6.1% new 10.0m≈ $524.6m 2026-02-17
VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-28 5.8% new 9.6m≈ $505.5m 2026-04-28
VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-28 5.2% new 8.7m≈ $454.6m 2026-04-28
STATE STREET CORP 13G · institution +0.3 pts · filed 2025-11-10 5.2% +0.3 pts 8.5m≈ $447.5m 2025-11-10

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 Q3 2022

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)

BuyingSelling
505Q4 20: 0 buyingQ4 20: 0 sellingQ1 21: 0 buyingQ1 21: 0 sellingQ1 21Q2 21: 0 buyingQ2 21: 0 sellingQ3 21: 0 buyingQ3 21: 0 sellingQ3 21Q4 21: 0 buyingQ4 21: 0 sellingQ1 22: 1 buyingQ1 22: 1 sellingQ1 22Q2 22: 0 buyingQ2 22: 5 sellingQ3 22: 0 buyingQ3 22: 0 sellingQ3 22
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20200—0——
Q1 20210—0——
Q2 20210—0——
Q3 20210—0——
Q4 20210—0——
Q1 20221$10.0k1$354.7k—
Q2 20220—5$15.7m—
Q3 20220—0——

None reported in Q3 2022.

Holders, Q3 2022

#ManagerLocationShares Value% of their portfolioChangeShares change
1 VANGUARD GROUP INC 0.01% of their portfolio Valley Forge, PA 18,107,90218.1m $404.4m $404.4m 0.01% —
2 BlackRock Inc. 0.01% of their portfolio New York, NY 15,488,20615.5m $345.9m $345.9m 0.01% —
3 Sarissa Capital Management LP 35.43% of their portfolio GREENWICH, CT 14,040,00014.0m $313.5m $313.5m 35.43% —
4 WELLINGTON MANAGEMENT GROUP LLP 0.03% of their portfolio Boston, MA 6,722,4056.7m $150.1m $150.1m 0.03% —
5 STATE STREET CORP 0.01% of their portfolio BOSTON, MA 6,467,2016.5m $144.4m $144.4m 0.01% —
6 Hardman Johnston Global Advisors LLC 5.76% of their portfolio Stamford, CT 5,734,2595.7m $128.0m $128.0m 5.76% —
7 RENAISSANCE TECHNOLOGIES LLC 0.18% of their portfolio NEW YORK, NY 5,556,1135.6m $124.1m $124.1m 0.18% —
8 PRIMECAP MANAGEMENT CO/CA/ 0.12% of their portfolio PASADENA, CA 5,347,7505.3m $119.4m $119.4m 0.12% —
9 PRICE T ROWE ASSOCIATES INC /MD/ 0.02% of their portfolio BALTIMORE, MD 4,687,1714.7m $104.7m $104.7m 0.02% —
10 T. Rowe Price Investment Management, Inc. 0.08% of their portfolio BALTIMORE, MD 4,562,8084.6m $101.9m $101.9m 0.08% —
11 ARMISTICE CAPITAL, LLC 2.13% of their portfolio NEW YORK, NY 3,792,0003.8m $84.7m $84.7m 2.13% —
12 CITADEL ADVISORS LLC 0.10% of their portfolio MIAMI, FL 3,682,2773.7m $82.2m $82.2m 0.10% —
13 GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio BOSTON, MA 2,951,9163.0m $65.9m $65.9m 0.01% —
14 Bank of New York Mellon Corp 0.01% of their portfolio NEW YORK, NY 2,496,1572.5m $55.7m $55.7m 0.01% —
15 Holocene Advisors, LP 0.35% of their portfolio New York, NY 2,437,1372.4m $54.4m $54.4m 0.35% —
16 WESTFIELD CAPITAL MANAGEMENT CO LP 0.40% of their portfolio BOSTON, MA 2,246,6542.2m $50.2m $50.2m 0.40% —
17 GOLDMAN SACHS GROUP INC 0.01% of their portfolio NEW YORK, NY 2,104,4732.1m $47.0m $47.0m 0.01% —
18 DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio AUSTIN, TX 2,070,0782.1m $46.2m $46.2m 0.02% —
19 Artisan Partners Limited Partnership 0.08% of their portfolio Milwaukee, WI 1,987,3732.0m $44.4m $44.4m 0.08% —
20 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio SAN FRANCISCO, CA 1,924,2951.9m $43.0m $43.0m 0.02% —
21 FIRST TRUST ADVISORS LP 0.05% of their portfolio Wheaton, IL 1,687,9751.7m $37.7m $37.7m 0.05% —
22 JACOBS LEVY EQUITY MANAGEMENT, INC 0.28% of their portfolio FLORHAM PARK, NJ 1,605,4051.6m $35.8m $35.8m 0.28% —
23 NORTHERN TRUST CORP 0.01% of their portfolio CHICAGO, IL 1,601,5501.6m $35.8m $35.8m 0.01% —
24 NORGES BANK 0.01% of their portfolio OSLO, Q8 1,552,4851.6m $34.7m $34.7m 0.01% —
25 Nuveen Asset Management, LLC 0.01% of their portfolio CHICAGO, IL 1,455,1601.5m $32.5m $32.5m 0.01% —
26 Krensavage Asset Management, LLC 10.04% of their portfolio NEW YORK, NY 1,411,6821.4m $31.5m $31.5m 10.04% —
27 MILLENNIUM MANAGEMENT LLC 0.04% of their portfolio NEW YORK, NY 1,294,0081.3m $28.9m $28.9m 0.04% —
28 Polar Capital Holdings Plc 0.18% of their portfolio London, X0 1,267,1961.3m $28.3m $28.3m 0.18% —
29 FRED ALGER MANAGEMENT, LLC 0.14% of their portfolio NEW YORK, NY 1,265,0041.3m $28.2m $28.2m 0.14% —
30 TWO SIGMA ADVISERS, LP 0.07% of their portfolio NEW YORK, NY 1,119,7001.1m $25.0m $25.0m 0.07% —
31 PUTNAM INVESTMENTS LLC 0.05% of their portfolio BOSTON, MA 1,109,3121.1m $24.8m $24.8m 0.05% —
32 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.12% of their portfolio TORONTO, A6 1,018,7001.0m $22.7m $22.7m 0.12% —
33 FMR LLC 0.00% of their portfolio BOSTON, MA 1,003,9211.0m $22.4m $22.4m 0.00% —
34 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.03% of their portfolio BOSTON, MA 887,739887.7k $19.8m $19.8m 0.03% —
35 EAGLE ASSET MANAGEMENT INC 0.12% of their portfolio ST PETERSBURG, FL 855,540855.5k $19.1m $19.1m 0.12% —
36 BAKER BROS. ADVISORS LP 0.12% of their portfolio NEW YORK, NY 815,016815.0k $18.2m $18.2m 0.12% —
37 TEACHER RETIREMENT SYSTEM OF TEXAS 0.13% of their portfolio AUSTIN, TX 813,538813.5k $18.2m $18.2m 0.13% —
38 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 770,021770.0k $17.2m $17.2m 0.00% —
39 PANAGORA ASSET MANAGEMENT INC 0.12% of their portfolio BOSTON, MA 748,313748.3k $16.7m $16.7m 0.12% —
40 AXA S.A. 0.03% of their portfolio PARIS, I0 660,466660.5k $14.7m $14.7m 0.03% —
41 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 629,266629.3k $14.1m $14.1m 0.00% —
42 Palo Alto Investors LP 1.07% of their portfolio PALO ALTO, CA 603,400603.4k $13.5m $13.5m 1.07% —
43 INTERNATIONAL BIOTECHNOLOGY TRUST PLC 4.25% of their portfolio London, X0 593,000593.0k $13.2m $13.2m 4.25% —
44 GLENMEDE TRUST CO NA 0.08% of their portfolio PHILADELPHIA, PA 545,740545.7k $12.2m $12.2m 0.08% —
45 PICTET ASSET MANAGEMENT SA 0.02% of their portfolio GENEVA 73, V8 542,914542.9k $12.1m $12.1m 0.02% —
46 TWO SIGMA INVESTMENTS, LP 0.04% of their portfolio NEW YORK, NY 522,062522.1k $11.7m $11.7m 0.04% —
47 GREAT POINT PARTNERS LLC 2.73% of their portfolio Greenwich, CT 507,500507.5k $11.3m $11.3m 2.73% —
48 Prosight Management, LP 6.16% of their portfolio DALLAS, TX 502,150502.1k $11.2m $11.2m 6.16% —
49 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 450,911450.9k $10.1m $10.1m 0.00% —
50 ACADIAN ASSET MANAGEMENT LLC 0.05% of their portfolio Boston, MA 445,684445.7k $9.9m $9.9m 0.05% —
51 SEGALL BRYANT & HAMILL, LLC 0.12% of their portfolio CHICAGO, IL 445,667445.7k $10.0m $10.0m 0.12% —
52 Hood River Capital Management LLC 0.38% of their portfolio PALM BEACH GARDENS, FL 439,990440.0k $9.8m $9.8m 0.38% —
53 MACQUARIE GROUP LTD 0.01% of their portfolio Sydney, NSW 2000, C3 425,124425.1k $9.5m $9.5m 0.01% —
54 13D Management LLC 4.85% of their portfolio New York, NY 415,055415.1k $9.3m $9.3m 4.85% —
55 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 407,610407.6k $9.1m $9.1m 0.00% —
56 California Public Employees Retirement System 0.01% of their portfolio Sacramento, CA 389,728389.7k $8.7m $8.7m 0.01% —
57 Swiss National Bank 0.01% of their portfolio ZURICH, V8 387,500387.5k $8.7m $8.7m 0.01% —
58 Price Jennifer C. 1.66% of their portfolio NEW YORK, NY 360,600360.6k $8.1m $8.1m 1.66% —
59 Thrivent Financial for Lutherans 0.02% of their portfolio Minneapolis, MN 358,965359.0k $8.0m $8.0m 0.02% —
60 TD Asset Management Inc 0.01% of their portfolio Toronto, A6 351,400351.4k $7.9m $7.9m 0.01% —
61 Ensign Peak Advisors, Inc 0.02% of their portfolio SALT LAKE CITY, UT 345,396345.4k $7.7m $7.7m 0.02% —
62 Cubist Systematic Strategies, LLC 0.06% of their portfolio STAMFORD, CT 345,140345.1k $7.7m $7.7m 0.06% —
63 FULLER & THALER ASSET MANAGEMENT, INC. 0.05% of their portfolio SAN MATEO, CA 323,079323.1k $7.2m $7.2m 0.05% —
64 Tekla Capital Management LLC 0.28% of their portfolio Boston, MA 309,613309.6k $6.9m $6.9m 0.28% —
65 HealthCor Management, L.P. 0.85% of their portfolio NEW YORK, NY 303,500303.5k $6.8m $6.8m 0.85% —
66 EMERALD ADVISERS, LLC 0.35% of their portfolio LEOLA, PA 301,294301.3k $6.7m $6.7m 0.35% —
67 Ally Bridge Group (NY) LLC 4.42% of their portfolio NEW YORK, NY 300,000300.0k $6.7m $6.7m 4.42% —
68 Legal & General Group Plc 0.00% of their portfolio London, X0 299,644299.6k $6.7m $6.7m 0.00% —
69 CITIGROUP INC 0.01% of their portfolio NEW YORK, NY 299,365299.4k $6.7m $6.7m 0.01% —
70 Rafferty Asset Management, LLC 0.07% of their portfolio New York, NY 290,631290.6k $6.5m $6.5m 0.07% —
71 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 279,333279.3k $6.2m $6.2m 0.00% —
72 CAPITAL FUND MANAGEMENT S.A. 0.15% of their portfolio PARIS, I0 267,653267.7k $6.0m $6.0m 0.15% —
73 SEIZERT CAPITAL PARTNERS, LLC 0.34% of their portfolio BIRMINGHAM, MI 267,132267.1k $6.0m $6.0m 0.34% —
74 Assenagon Asset Management S.A. 0.03% of their portfolio SENNINGERBERG, N4 263,046263.0k $5.9m $5.9m 0.03% —
75 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 248,242248.2k $5.5m $5.5m 0.01% —
76 JUPITER ASSET MANAGEMENT LTD 0.08% of their portfolio London, X0 241,470241.5k $5.4m $5.4m 0.08% —
77 Schonfeld Strategic Advisors LLC 0.04% of their portfolio NEW YORK, NY 233,911233.9k $5.2m $5.2m 0.04% —
78 VOYA INVESTMENT MANAGEMENT LLC 0.01% of their portfolio ATLANTA, GA 233,091233.1k $5.2m $5.2m 0.01% —
79 SECTORAL ASSET MANAGEMENT INC 1.02% of their portfolio MONTREAL, A8 232,400232.4k $5.2m $5.2m 1.02% —
80 SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.09% of their portfolio BALA CYNWYD, PA 225,930225.9k $5.0m $5.0m 0.09% —
81 RHUMBLINE ADVISERS 0.01% of their portfolio BOSTON, MA 216,319216.3k $4.8m $4.8m 0.01% —
82 TWINBEECH CAPITAL LP 0.13% of their portfolio PURCHASE, NY 214,159214.2k $4.8m $4.8m 0.13% —
83 EMERALD MUTUAL FUND ADVISERS TRUST 0.29% of their portfolio LEOLA, PA 206,180206.2k $4.6m $4.6m 0.29% —
84 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio WEST SACRAMENTO, CA 205,012205.0k $4.6m $4.6m 0.01% —
85 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 204,066204.1k $4.6m $4.6m 0.00% —
86 BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio PARIS, I0 202,854202.9k $4.5m $4.5m 0.01% —
87 Tamarack Advisers, LP 2.64% of their portfolio CARLSBAD, CA 200,000200.0k $4.5m $4.5m 2.64% —
88 Integral Health Asset Management, LLC 0.91% of their portfolio New York, NY 200,000200.0k $4.5m $4.5m 0.91% —
89 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 195,081195.1k $4.4m $4.4m 0.00% —
90 Verition Fund Management LLC 0.03% of their portfolio GREENWICH, CT 194,776194.8k $4.3m $4.3m 0.03% —
91 Hillsdale Investment Management Inc. 0.39% of their portfolio Toronto, A6 194,300194.3k $4.3m $4.3m 0.39% —
92 NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio ALBANY, NY 192,821192.8k $4.3m $4.3m 0.01% —
93 Connor, Clark & Lunn Investment Management Ltd. 0.03% of their portfolio VANCOUVER, A1 192,484192.5k $4.3m $4.3m 0.03% —
94 Man Group plc 0.02% of their portfolio LONDON, X0 192,408192.4k $4.3m $4.3m 0.02% —
95 Russell Investments Group, Ltd. 0.01% of their portfolio Seattle, WA 186,287186.3k $4.2m $4.2m 0.01% —
96 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 183,155183.2k $4.1m $4.1m 0.00% —
97 AQR CAPITAL MANAGEMENT LLC 0.01% of their portfolio Greenwich, CT 181,748181.7k $4.1m $4.1m 0.01% —
98 CREDIT SUISSE AG/ 0.00% of their portfolio ZURICH, V8 179,635179.6k $4.0m $4.0m 0.00% —
99 ALGERT GLOBAL LLC 0.23% of their portfolio SAN FRANCISCO, CA 169,314169.3k $3.8m $3.8m 0.23% —
100 STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio MADISON, WI 164,863164.9k $3.7m $3.7m 0.01% —