ALKS Alkermes plc

NASDAQ
$45.83

Alkermes plc (ALKS) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
-2.33
21 buyers / 22 sellers
MIXED
Funds compared
46
funds with comparable ALKS positions
37 current holders · 35 prior-quarter holders
Net share change
-433.1K
+5.31M added, -5.74M cut
Position activity
11 new 10 increased 13 reduced 9 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
Avoro Capital Advisors Healthcare Sold Out -1.20M -100.0% $62.9M 0.0% 69
Bridgewater Associates Quant Macro Sold Out -83.8K -100.0% $4.4M 0.0% 63
Logos Global Management Growth Healthcare Sold Out -350.0K -100.0% $18.3M 0.0% 63
ADAGE CAPITAL PARTNERS GP, L.L.C. New +1.37M — $71.7M 0.1% 62
Farallon Capital Management Event Value Sold Out -20.8K -100.0% $1.1M 0.0% 62
MILLENNIUM MANAGEMENT LLC New +319.6K — $16.7M 0.0% 61
Integral Health Asset Management Growth Healthcare New +100.0K — $5.2M 0.2% 59
Soleus Capital Management Growth Healthcare Reduced -941.6K -47.8% $49.3M 1.9% 56
ADAR1 Capital Management Long/Short Growth Sold Out -46.4K -100.0% $2.4M 0.0% 56
Tudor Investment Corporation Macro New +25.9K — $1.4M 0.0% 56

Most significant buyers

By move score, not size.

  • ADAGE CAPITAL PARTNERS GP, L.L.C. New · +1.37M
  • MILLENNIUM MANAGEMENT LLC New · +319.6K
  • Integral Health Asset Management New · +100.0K
  • Tudor Investment Corporation New · +25.9K
  • Weiss Asset Management New · +10.0K

Most significant sellers

By move score, not size.

  • Avoro Capital Advisors Sold Out · -1.20M
  • Bridgewater Associates Sold Out · -83.8K
  • Logos Global Management Sold Out · -350.0K
  • Farallon Capital Management Sold Out · -20.8K
  • Soleus Capital Management Reduced · -941.6K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Avoro Capital Advisors 1 0 1.2M -1.20M -100.0% 0.0% Sold Out 69
Bridgewater Associates 1 0 83.8K -83.8K -100.0% 0.0% Sold Out 63
Logos Global Management 2 0 350.0K -350.0K -100.0% 0.0% Sold Out 63
ADAGE CAPITAL PARTNERS GP, L.L.C. 2 1.4M 0 +1.37M — 0.1% New 62
Farallon Capital Management 1 0 20.8K -20.8K -100.0% 0.0% Sold Out 62
MILLENNIUM MANAGEMENT LLC 2 319.6K 0 +319.6K — 0.0% New 61
Integral Health Asset Management 2 100.0K 0 +100.0K — 0.2% New 59
Soleus Capital Management 2 1.0M 2.0M -941.6K -47.8% 1.9% Reduced 56
ADAR1 Capital Management 3 0 46.4K -46.4K -100.0% 0.0% Sold Out 56
Tudor Investment Corporation 2 25.9K 0 +25.9K — 0.0% New 56
Hudson Bay Capital Management 3 0 173.6K -173.6K -100.0% 0.0% Sold Out 56
Weiss Asset Management 2 10.0K 0 +10.0K — 0.0% New 54
Cinctive Capital Management 3 138.6K 0 +138.6K — 0.3% New 53
Engineers Gate 4 0 208.5K -208.5K -100.0% 0.0% Sold Out 52
D. E. Shaw & Co., Inc. 1 1.3M 710.3K +601.7K +84.7% 0.0% Increased 52
Deep Track Capital 1 4.0M 3.6M +409.7K +11.4% 3.1% Increased 51
Edgestream Partners 4 0 52.8K -52.8K -100.0% 0.0% Sold Out 51
Walleye Capital 3 0 5.0K -5.0K -100.0% 0.0% Sold Out 51
Aquatic Capital Management 4 66.9K 0 +66.9K — 0.1% New 51
Caption Management 3 10.0K 0 +10.0K — 0.0% New 50
Balyasny Asset Management L.P. 2 142.4K 586.8K -444.4K -75.7% 0.0% Reduced 49
Brevan Howard Capital Management 3 5.8K 0 +5.8K — 0.0% New 49
Boothbay Fund Management 4 9.1K 0 +9.1K — 0.0% New 49
Capital Fund Management 3 33.3K 243.0K -209.8K -86.3% 0.0% Reduced 48
Schonfeld Strategic Advisors 3 195.2K 16.6K +178.6K +1076.9% 0.1% Increased 47
Affinity Asset Advisors 2 1.1M 1.4M -225.0K -16.7% 3.0% Reduced 47
Holocene Advisors, LP 2 3.6M 2.3M +1.28M +55.4% 0.4% Increased 47
Biotechnology Value Fund 1 2.2M 2.0M +154.7K +7.7% 2.9% Increased 45
Quantbot Technologies 4 6.8K 0 +6.8K — 0.0% New 45
Man Group 3 124.0K 625.0K -501.0K -80.2% 0.0% Reduced 45
ExodusPoint Capital Management 3 31.7K 204.3K -172.6K -84.5% 0.0% Reduced 45
Gotham Asset Management, LLC 2 11.2K 41.5K -30.4K -73.1% 0.0% Reduced 44
Squarepoint Ops LLC 2 115.2K 277.6K -162.4K -58.5% 0.0% Reduced 40
CenterBook Partners 4 7.4K 38.6K -31.2K -80.8% 0.0% Reduced 40
TWO SIGMA INVESTMENTS, LP 2 1.0M 780.7K +257.6K +33.0% 0.0% Increased 38
CITADEL ADVISORS LLC 1 1.6M 2.2M -596.5K -26.6% 0.1% Reduced 38
Moore Capital Management 3 76.5K 158.5K -82.0K -51.7% 0.1% Reduced 37
RENAISSANCE TECHNOLOGIES LLC 1 6.5M 6.2M +300.5K +4.9% 0.5% Increased 35
AQR Capital Management 3 213.0K 384.0K -171.0K -44.5% 0.0% Reduced 33
Senator Investment Group 2 275.0K 235.0K +40.0K +17.0% 0.6% Increased 32
MARSHALL WACE, LLP 2 970.0K 999.3K -29.4K -2.9% 0.1% Reduced 28
Rock Springs Capital Management 3 199.8K 184.0K +15.8K +8.6% 0.5% Increased 27
Woodline Partners LP 2 560.3K 558.6K +1.7K +0.3% 0.1% Increased 23
Baker Bros. Advisors 1 10.0M 10.0M 0 +0.0% 2.6% Unchanged 38
RTW Investments 1 1.7M 1.7M 0 +0.0% 0.7% Unchanged 29
Palo Alto Investors 2 242.6K 242.6K 0 +0.0% 1.8% Unchanged 28

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.