Equibles

ALKS

Alkermes plc.

Company with tickers: ALKS

CIK
1520262
CUSIP
G01767105
Shares Outstanding
166,675,807
Price History Institutional Holders Short Volume Short Interest Fails to Deliver Financials SEC Filings Earnings Calls Insider Trades Congressional Trades
Holders: 377
Total Value: $5,440,674,757
Total Shares: 153,865,243
Showing 1–100 of 388 holdings by value · page 1 of 4

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 377 13F filers · Δ vs Dec 31, 2025
Top Holder
18.4%
Jun 2023 → Mar 2026 · range 11.5% – 19.9%
+2.4 pts
Top 5
39.0%
Jun 2023 → Mar 2026 · range 36.6% – 47.7%
−2.4 pts
Top 10
53.1%
Jun 2023 → Mar 2026 · range 50.9% – 62.7%
−3.2 pts
HHI
532
Jun 2023 → Mar 2026 · range 412 – 626
Broadly held +25

Quarterly Activity

vs Dec 31, 2025
New
74
Increased
117
Decreased
146
Sold Out
55
Unchanged
40
Holder count: +19
Institutional value: +9.8%
Shares held: -13.1%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds
Mid Deep Track Capital, LP +1,590,323 3,590,323
Mega FIRST TRUST ADVISORS LP +1,514,783 2,968,785
Mega CITADEL ADVISORS LLC +1,028,816 2,331,284
Large MARSHALL WACE, LLP +869,423 999,322
Mid Commodore Capital LP +650,000 4,200,000

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds
Mega PRICE T ROWE ASSOCIATES INC /MD/ −4,334,387 4,664,576
Mega UBS Group AG −2,049,872 495,023
Mid NORTHERN TRUST CORP −1,607,304 46,171
Mega JPMORGAN CHASE & CO −1,082,758 4,101,789
Large Squarepoint Ops LLC −818,227 277,619

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD)
Large Holocene Advisors, LP 2,317,326 $81,940,647
Mid BVF INC/IL 2,000,000 $70,720,000
Mega T. Rowe Price Investment Management, Inc. 894,276 $31,621,599
Mid Bain Capital Life Sciences Investors, LLC 610,000 $21,569,600
Small Prosight Management, LP 513,632 $18,162,027

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD)
Mega VANGUARD GROUP INC 16,629,649 $465,297,579
Mega NORGES BANK 1,945,734 $54,441,637
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 1,450,841 $40,594,531
Large VIRGINIA RETIREMENT SYSTEMS ET AL 976,483 $27,321,994
Large TWO SIGMA ADVISERS, LP 562,587 $15,741,184
100 of 100 shown
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Action
Mega BlackRock, Inc. $1,001,197,527 18.40% 28,314,410 View
Large BAKER BROS. ADVISORS LP $354,033,761 6.51% 10,012,267 View
Mega STATE STREET CORP $334,692,512 6.15% 9,465,286 View
Large RENAISSANCE TECHNOLOGIES LLC $217,832,734 4.00% 6,160,428 View
Mega AMERICAN CENTURY COMPANIES INC $214,709,562 3.95% 6,072,103 View
Mega PRICE T ROWE ASSOCIATES INC /MD/ $164,939,406 3.03% 4,664,576 View
Mega DIMENSIONAL FUND ADVISORS LP $159,911,284 2.94% 4,522,378 View
Mid Commodore Capital LP $148,512,000 2.73% 4,200,000 View
Mega GEODE CAPITAL MANAGEMENT, LLC $147,884,960 2.72% 4,182,267 View
Mega JPMORGAN CHASE & CO $145,039,257 2.67% 4,101,789 View
Mid Deep Track Capital, LP $126,953,821 2.33% 3,590,323 View
Mega WELLINGTON MANAGEMENT GROUP LLP $105,025,067 1.93% 2,970,166 View
Mega FIRST TRUST ADVISORS LP $104,976,237 1.93% 2,968,785 View
Mega PRIMECAP MANAGEMENT CO/CA/ $89,814,046 1.65% 2,539,990 View
Mega Nuveen, LLC $87,005,718 1.60% 2,460,569 View
Large Holocene Advisors, LP $81,940,647 1.51% 2,317,326 View
Mega CITADEL ADVISORS LLC $79,262,409 1.46% 2,241,584 View
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $79,091,692 1.45% 2,236,756 View
Mid BVF INC/IL $70,720,000 1.30% 2,000,000 View
Mid Soleus Capital Management, L.P. $69,689,751 1.28% 1,970,864 View
Mega GOLDMAN SACHS GROUP INC $66,553,812 1.22% 1,882,178 View
Large LOOMIS SAYLES & CO L P $63,102,783 1.16% 1,784,581 View
Large RTW INVESTMENTS, LP $59,134,508 1.09% 1,672,356 View
Mid Affinity Asset Advisors, LLC $47,736,000 0.88% 1,350,000 View
Mega FMR LLC $46,807,692 0.86% 1,323,747 View
Mega BANK OF AMERICA CORP /DE/ $42,815,689 0.79% 1,210,851 View
Large Avoro Capital Advisors LLC $42,432,000 0.78% 1,200,000 View
Large Artisan Partners Limited Partnership $39,311,161 0.72% 1,111,741 View
Mega Bank of New York Mellon Corp $36,649,221 0.67% 1,036,460 View
Large MARSHALL WACE, LLP $35,336,024 0.65% 999,322 View
Mega PRINCIPAL FINANCIAL GROUP INC $33,875,445 0.62% 958,016 View
Large Pictet Asset Management Holding SA $33,315,626 0.61% 942,184 View
Large PANAGORA ASSET MANAGEMENT INC $32,988,829 0.61% 932,942 View
Mega T. Rowe Price Investment Management, Inc. $31,621,599 0.58% 894,276 View
Large Driehaus Capital Management LLC $28,003,811 0.51% 791,963 View
Mega TWO SIGMA INVESTMENTS, LP $27,604,950 0.51% 780,683 View
Mega AMERIPRISE FINANCIAL INC $26,206,745 0.48% 741,141 View
Mega D. E. Shaw & Co., Inc. $25,116,101 0.46% 710,297 View
Mid Frazier Life Sciences Management, L.P. $24,774,877 0.46% 700,647 View
Large Public Sector Pension Investment Board $23,953,040 0.44% 677,405 View
Large Man Group plc $22,101,626 0.41% 625,046 View
Mega MORGAN STANLEY $21,770,726 0.40% 615,688 View
Mid Bain Capital Life Sciences Investors, LLC $21,569,600 0.40% 610,000 View
Large Balyasny Asset Management L.P. $20,748,363 0.38% 586,775 View
Mid SEGALL BRYANT & HAMILL, LLC $20,712,791 0.38% 585,769 View
Large Woodline Partners LP $19,750,929 0.36% 558,567 View
Mega BNP PARIBAS ARBITRAGE, SA $18,668,913 0.34% 527,967 View
Mega Invesco Ltd. $18,538,362 0.34% 524,275 View
Small Prosight Management, LP $18,162,027 0.33% 513,632 View
Mega UBS Group AG $17,504,011 0.32% 495,023 View
Small SILVERARC CAPITAL MANAGEMENT, LLC $16,276,703 0.30% 460,314 View
Mega RHUMBLINE ADVISERS $15,895,416 0.29% 449,531 View
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $14,255,486 0.26% 403,153 View
Mega Fisher Asset Management, LLC $13,807,337 0.25% 390,479 View
Mid RICE HALL JAMES & ASSOCIATES, LLC $13,802,563 0.25% 390,344 View
Mega AQR CAPITAL MANAGEMENT LLC $13,577,424 0.25% 383,977 View
Mega Legal & General Group Plc $13,462,329 0.25% 380,722 View
Mid Logos Global Management LP $12,376,000 0.23% 350,000 View
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $12,022,329 0.22% 339,998 View
Mega California Public Employees Retirement System $11,605,222 0.21% 328,202 View
Small Spruce Street Capital LP $11,244,197 0.21% 317,992 View
Mega RAYMOND JAMES FINANCIAL INC $11,224,464 0.21% 317,434 View
Mega Swiss National Bank $10,972,208 0.20% 310,300 View
Mega VICTORY CAPITAL MANAGEMENT INC $10,923,729 0.20% 308,929 View
Mega ROYAL BANK OF CANADA $10,761,354 0.20% 304,337 View
Large Squarepoint Ops LLC $9,816,607 0.18% 277,619 View
Mid GENDELL JEFFREY L $9,321,037 0.17% 263,604 View
Mega ALLIANCEBERNSTEIN L.P. $9,226,661 0.17% 260,935 View
Mid C WorldWide Group Holding A/S $8,840,000 0.16% 250,000 View
Large MACKENZIE FINANCIAL CORP $8,811,075 0.16% 249,182 View
Mid PEREGRINE CAPITAL MANAGEMENT LLC $8,628,087 0.16% 244,007 View
Large CAPITAL FUND MANAGEMENT S.A. $8,594,000 0.16% 243,043 View
Small Palo Alto Investors LP $8,576,921 0.16% 242,560 View
Small Atle Fund Management AB $8,573,845 0.16% 242,473 View
Small Eagle Health Investments LP $8,439,477 0.16% 238,673 View
Mid Senator Investment Group LP $8,309,600 0.15% 235,000 View
Large ACADIAN ASSET MANAGEMENT LLC $8,059,923 0.15% 227,939 View
Large Robeco Institutional Asset Management B.V. $7,797,622 0.14% 220,521 View
Mid Engineers Gate Manager LP $7,372,453 0.14% 208,497 View
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $6,994,208 0.13% 197,800 View
Mega NEUBERGER BERMAN GROUP LLC $6,973,699 0.13% 197,220 View
Mid MARTINGALE ASSET MANAGEMENT L P $6,886,925 0.13% 194,766 View
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $6,789,120 0.12% 192,000 View
Mid Rock Springs Capital Management LP $6,505,744 0.12% 183,986 View
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM $6,498,991 0.12% 183,795 View
Mega FRANKLIN RESOURCES INC $6,454,435 0.12% 182,535 View
Large SG Americas Securities, LLC $6,329,192 0.12% 178,993 View
Large Universal- Beteiligungs- und Servicegesellschaft mbH $6,310,168 0.12% 178,455 View
Mega BARCLAYS PLC $6,187,397 0.11% 174,983 View
Large Hudson Bay Capital Management LP $6,139,415 0.11% 173,626 View
Large Rafferty Asset Management, LLC $5,743,312 0.11% 162,424 View
Small Tetragon Partners GP Ltd $5,650,209 0.10% 159,791 View
Mid MOORE CAPITAL MANAGEMENT, LP $5,604,524 0.10% 158,499 View
Large BESSEMER GROUP INC $5,600,916 0.10% 158,397 View
Mid SummitTX Capital, L.P. $5,525,318 0.10% 156,259 View
Mega JANUS HENDERSON GROUP PLC $5,446,005 0.10% 154,016 View
Large SEI INVESTMENTS CO $5,438,968 0.10% 153,817 View
Mid WEDGE CAPITAL MANAGEMENT L L P/NC $5,347,634 0.10% 151,234 View
Mega DEUTSCHE BANK AG\ $5,294,594 0.10% 149,734 View
Small DAFNA Capital Management LLC $4,932,083 0.09% 139,482 View
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