ALKSAlkermes plc

$40.63+46% 1Y

Who owns ALKS

417 institutions reported holding ALKS for 2026Q2, together 107% of the company, more than the 382 a quarter earlier.

417

Institutions reporting a position · as of 2026Q2 · up from 382 the quarter before

Shares held by institutions
177.9M

Shares held by institutions · 107% of the company · long US equity positions only, as reported on Form 13F

Reported value
$9.32B

Reported value · at Jun 30, 2026 prices, not today's

Top 5 holders
44%

Top 5 holders · of the whole company, between five filers

Details›
Reporting quarter2026-06-30
2026Q2
Quarters on record
53
New positions
89
Positions exited
54
Added to
122
Reduced
127
Top 10 holdersof the company
58%
Shares sold shortsettled Sep 15, 2026
15.2M
Short interestof shares outstanding
9.1%
Days to coverat the average daily volume
10.7
Change in the short positionsince the Aug 31, 2026 count
+3.0%
Institutional ownership by quarter, 2013Q2 to 2026Q2
QuarterFilersSharesReported value
2026Q2417177.9M$9.32B
2026Q1382176.5M$6.21B
2025Q4360180.3M$5.05B
2025Q3352169.5M$5.08B
2025Q2346169.1M$4.84B
2025Q1364172.1M$5.68B
2024Q4340167.3M$4.81B
2024Q3335178.8M$5.00B
2024Q2321179.4M$4.32B
2024Q1334176.1M$4.77B
2023Q4299175.4M$4.87B
2023Q3304163.3M$4.57B
2023Q2289160.7M$5.03B
2023Q1265161.6M$4.56B
2022Q4277162.2M$4.24B
2022Q3273159.8M$3.57B
Largest reported holders, 2026Q2
HolderShares% of companyValue
BlackRock Inc.29.2M18%$1.53B
VANGUARD GROUP INC18.5M11%$967M
BAKER BROS. ADVISORS LP10.0M6.0%$525M
STATE STREET CORP9.2M5.5%$480M
PRICE T ROWE ASSOCIATES INC /MD/6.7M4.1%$353M
RENAISSANCE TECHNOLOGIES LLC6.5M3.9%$339M
GEODE CAPITAL MANAGEMENT LLC4.5M2.7%$235M
DIMENSIONAL FUND ADVISORS LP4.2M2.5%$220M
Deep Track Capital, LP4.0M2.4%$210M
AMERICAN CENTURY COMPANIES INC4.0M2.4%$207M
Short interest by settlement date, Aug 29, 2025 to Sep 15, 2026
SettlementShares shortOf shares outstandingDays to cover
Sep 15, 202615.2M9.1%10.7
Aug 31, 202614.7M8.9%11.8
Aug 14, 202614.8M8.9%10.2
Jul 31, 202614.4M8.7%7.7
Jul 15, 202615.0M9.0%9.1
Jun 30, 202617.5M11%4.8
Jun 15, 202618.0M11%9.5
May 29, 202617.4M10%8.4
May 15, 202618.3M11%7.5
Apr 30, 202619.8M12%12.6
Apr 15, 202619.7M12%8.2
Mar 31, 202619.0M11%5.9

SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold. The short position is FINRA's consolidated count for each twice-monthly settlement date, as a share of shares outstanding.

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