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ALKS — ALKERMES PLC

Reported value held$4.17B
Funds holding (latest)49
SectorHealth Care
Funds holding (Q2 2026)37
Institutional value$3.54B · 74.32M sh
New / Add / Cut / Exit2 / 22 / 11 / 4
Top-5 / Top-10 concentration67.1% / 81.3%
Institutional holdings change Accumulating +10.0% (+6.74M sh)
Institutional value change Up +59.2%

As of Q2 2026, 37 SEC-registered investment managers reported holding ALKS (ALKERMES PLC) in their latest 13F filings, with a combined reported value of $3.54B across 74.32M shares. That is +10.0% by share count (+6.74M shares) versus the previous quarter, while reported value moved +59.2%. Ownership is concentrated: the five largest holders account for 67.1% of reported value and the top ten for 81.3%.

Compared with the prior quarter, 2 opened new positions, 22 added to existing stakes, 11 trimmed, 4 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

ALKS is classified in the Health Care sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

FundQuarterSharesValuePortfolio WeightChange
BlackRock Inc history Q2 2026 29.24M $1.53B 0.02% Add
Vanguard Group history Q4 2025 18.01M $503.85M 0.01% Reduce
Renaissance Technologies history Q2 2026 6.46M $338.52M 0.47% Add
Geode Capital Management history Q2 2026 4.48M $234.66M 0.01% Add
Wellington Management Group history Q2 2026 2.81M $147.48M 0.03% Reduce
Charles Schwab Investment Management history Q2 2026 2.34M $122.35M 0.02% Add
Norges Bank Investment Management history Q2 2026 2.16M $113.01M 0.01% Add
Goldman Sachs Group history Q2 2026 2.02M $106.05M 0.01% Add
Citadel Advisors history Q2 2026 1.89M $99.13M 0.01% Reduce
Northern Trust Corp history Q2 2026 1.83M $95.97M 0.01% Add
Morgan Stanley history Q2 2026 1.75M $91.79M 0.01% Add
D. E. Shaw & Co history Q2 2026 1.31M $68.74M 0.04% Add
Viking Global Investors history Q2 2023 2.12M $66.24M 0.28% Reduce
Franklin Resources history Q2 2026 1.17M $61.31M 0.01% Add
Fidelity Management & Research (FMR) history Q2 2026 1.13M $59.44M 0.00% Reduce
BNY Mellon history Q2 2026 1.10M $57.49M 0.01% Add
Two Sigma Investments history Q2 2026 1.04M $54.40M 0.04% Add
Principal Global Investors history Q2 2026 983.82K $51.55M 0.03% Add
Marshall Wace history Q2 2026 969.95K $50.83M 0.04% Reduce
Bank of America Corp history Q2 2026 918.30K $48.11M 0.00% Reduce

View all 49 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

Fund Position History — shares by quarter (top 20 funds)

FundQ3 2021Q4 2021Q1 2022Q2 2022Q3 2022Q4 2022Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
BlackRock Inc — — — — — — — — — — — — 28.28M 27.85M 27.41M 27.86M 27.97M 28.27M 28.31M 29.24M
Renaissance Technologies 4.74M 4.81M 4.87M 5.32M 5.56M 5.64M 4.94M 5.17M 6.12M 6.05M 5.89M 5.48M 5.42M 5.48M 5.74M 5.81M 6.29M 6.67M 6.16M 6.46M
Geode Capital Management 2.81M 2.87M 2.87M 2.88M 2.95M 3.04M 3.17M 3.34M 3.48M 3.64M 3.74M 3.93M 3.87M 3.82M 3.94M 4.02M 4.06M 4.08M 4.18M 4.48M
Wellington Management Group 11.81M 11.81M 11.48M 5.96M 6.72M 6.04M 6.71M 7.69M 11.75M 15.24M 14.89M 14.35M 12.66M 7.01M 3.10M 1.70M 375.19K 3.02M 2.97M 2.81M
Charles Schwab Investment Management 1.93M 1.87M 1.93M 1.88M 1.92M 1.97M 1.95M 2.05M 2.16M 2.15M 2.34M 2.38M 2.11M 2.07M 2.05M 2.09M 2.14M 2.15M 2.24M 2.34M
Norges Bank Investment Management — — — — — 1.70M — — — 2.00M — 2.13M — 1.97M — 1.86M — 1.95M — 2.16M
Goldman Sachs Group 1.89M 1.97M 2.29M 2.28M 2.10M 1.87M 1.34M 1.64M 1.93M 1.40M 1.39M 1.24M 1.78M 1.44M 1.49M 1.71M 1.99M 2.27M 1.88M 2.02M
Citadel Advisors — 729.10K 2.39M 2.85M 4.25M 9.43M 3.56M 1.55M 478.26K 69.90K 408.38K 355.61K 115.82K 85.91K 125.97K 75.42K 767.03K 1.30M 2.33M 1.89M
Northern Trust Corp 1.74M 1.71M 1.63M 1.61M 1.60M 1.61M 1.63M 1.68M 1.69M 1.84M 1.80M 1.77M 1.74M 1.91M 1.88M 1.81M 1.77M 1.65M 1.70M 1.83M
Morgan Stanley 417.14K 393.49K 1.59M 747.36K 770.02K 851.83K 574.57K 1.12M 2.01M 2.52M 1.95M 2.12M 2.57M 1.82M 2.16M 1.80M 1.55M 1.89M 1.74M 1.75M
D. E. Shaw & Co 77.09K 188.90K 59.84K 274.86K 248.24K 571.35K 444.28K 681.62K 964.59K 638.43K 341.84K 323.14K 555.68K 555.93K 468.48K 820.10K 528.75K 911.27K 710.30K 1.31M
Franklin Resources 30.22K 35.44K 42.39K 34.65K 86.40K 86.95K 87.08K 168.47K 158.27K 144.74K 226.59K 117.10K 120.01K 96.92K 94.01K 94.01K 184.35K 192.81K 182.53K 1.17M
Fidelity Management & Research (FMR) 4 24.64K 246.07K 1.07M 1.00M 668.64K 1.07M 1.27M 1.31M 1.05M 104.64K 609.84K 346.73K 213.57K 1.54M 1.28M 1.30M 1.36M 1.32M 1.13M
BNY Mellon 2.76M 2.90M 2.59M 2.50M 2.50M 2.50M 2.66M 2.65M 2.76M 3.29M 2.88M 2.42M 2.19M 2.14M 1.69M 1.54M 1.42M 1.07M 1.04M 1.10M
Two Sigma Investments 495.62K 185.51K 234.11K 347.35K 522.06K 900.43K 473.61K 944.72K 1.19M 428.68K 293.77K 78.73K 405.66K 328.52K 557.94K 325.90K 656.50K 1.21M 780.68K 1.04M
Principal Global Investors 275.19K 277.66K 202.50K 145.75K 74.34K 79.84K 70.84K 63.45K 75.15K 939.54K 978.55K 947.32K 877.94K 899.76K 928.87K 914.79K 900.33K 947.62K 958.02K 983.82K
Marshall Wace 21.04K — — — — 113.40K 113.40K 725.08K 1.77M — — — — — — 207.51K — 129.90K 999.32K 969.95K
Bank of America Corp 303.33K 339.61K 451.12K 511.13K 629.27K 703.34K 1.20M 761.59K 691.37K 1.39M 1.99M 2.00M 1.92M 399.29K 1.51M 2.16M 1.10M 1.33M 1.21M 918.30K
PSP Investments — — — — — — — — — 346.30K 342.06K 372.32K 349.42K 403.10K 585.26K 636.91K 710.70K 671.17K 677.40K 677.40K
Invesco Ltd 442.00K 512.93K 543.55K 570.79K 450.91K 474.54K 429.29K 401.24K 392.87K 849.99K 600.30K 696.24K 751.08K 721.92K 735.50K 613.02K 584.29K 538.72K 524.27K 443.11K

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