WhaleCreep

Which hedge funds own ALNY? ALNYLAM PHARMACEUTICALS INC, Q2 2026 13F holders

HealthcareBiotechnology

77 tracked hedge funds disclosed a position in ALNY (ALNYLAM PHARMACEUTICALS INC) in their Q2 2026 13F filings, worth $3.7bn in total. The largest holder by portfolio weight is Steelhead Partners LLC at 5.6% of its book. 21 opened a new position this quarter: Deep Track Capital, LP, Paradigm Biocapital Advisors LP, Twinbeech Capital LP, Arrowpoint Investment Partners (Singapore) Pte. Ltd.. 8 exited: FengHe Fund Management Pte. Ltd., Keystone Investors Pte Ltd, Edgestream Partners, L.P..

77
Holders
Tracked managers whose filing for the quarter reports a long equity position in the security.
21
New this quarter
Holders whose previous filing (at most two quarters earlier) did not report the security.
8
Exited this quarter
Tracked managers whose previous filing reported the security and whose filing for the quarter does not.
$476m
Inflow, new holders
Combined value of the positions the new holders reported for the quarter.
$17.6m
Outflow, exits
Combined value the exiting managers reported for the security in their previous filing.
$3.7bn
Combined value
Sum of the holders' reported positions in the security.
6.2%
Share of managers holding
Holders as a share of tracked managers filing for that quarter. Comparable across the 2024 coverage expansion, where the raw holder count is not.

Holders, Q2 2026

77 rows
Steelhead Partners LLC Hedge fund5.6%$78.2m65.00m+8.3%added
Prosight Management, LP Hedge fund5.1%$29.5m98,080+29%added
Deep Track Capital, LP Hedge fund3.7%$248m825,000–new
Paradigm Biocapital Advisors LP Hedge fund2.7%$144m480,000–new
Cannon Global Investment Management, LLC Hedge fund2.3%$753k2,500+4.2%added
Polymer Capital Management (HK) LTD Hedge fund2.0%$19.6m64,957+12%added
Warberg Asset Management LLC Hedge fund1.9%$6.3m5.00m0.0%held
Parkman Healthcare Partners LLC Hedge fund1.6%$15.3m50,672+88%added
Portman Square Capital LLP Hedge fund1.3%$7.5m25,016+48%added
Bronte Capital Management Pty Ltd. Hedge fund1.2%$10.7m35,384−5.0%reduced
Ishara Investments LP Hedge fund1.1%$1.5m5,1250.0%held
Casdin Capital, LLC Hedge fund1.1%$22.6m75,0000.0%held
DeepCurrents Investment Group LLC Hedge fund1.0%$28.9m24.00m0.0%held
Rock Springs Capital Management LP Hedge fund1.0%$20.1m66,750−9.8%reduced
683 Capital Management, LLC Hedge fund1.0%$10.5m35,000+67%added
Tremblant Capital Group Hedge fund0.8%$28.0m92,940−1.7%reduced
Twinbeech Capital LP Hedge fund0.8%$4.3m14,325–new
Baillie Gifford Long-only investor0.7%$734m2.44m−2.2%reduced
Arrowpoint Investment Partners (Singapore) Pte. Ltd. Hedge fund0.5%$1.7m5,588–new
Entropy Technologies, LP Hedge fund0.5%$12.4m41,204+15%added
Sphera Funds Management Ltd. Hedge fund0.5%$3.3m10,800–new
Candriam S.C.A. Hedge fund0.4%$94.6m314,512+40%added
Two Sigma Investments, LP Hedge fund0.4%$565m1.88m−77%reduced
Rangeley Capital, LLC Hedge fund0.4%$452k1,500–new
Polar Capital Holdings Plc Hedge fund0.4%$145m482,751+87%added
J. Goldman & Co LP Hedge fund0.4%$11.6m38,698–new
Catalyst Funds Management Pty Ltd Hedge fund0.4%$6.3m20,803–new
Brandywine Managers, LLC Hedge fund0.3%$698k2,318−27%reduced
Soleus Capital Management, L.P. Hedge fund0.3%$9.9m33,050−75%reduced
Capital Fund Management S.A. Hedge fund0.3%$46.9m155,904+11%added
Qube Research & Technologies Ltd Hedge fund0.3%$240m798,715−4.7%reduced
Quantitative Investment Management, LLC Hedge fund0.3%$2.4m7,981+107%added
Woodline Partners LP Hedge fund0.2%$74.1m246,282+1.0%added
Deerfield Management Company, L.P. Hedge fund0.2%$20.5m67,9350.0%held
Hudson Bay Capital Management LP Hedge fund0.2%$44.8m148,720+272%added
D. E. Shaw & Co., Inc. Hedge fund0.2%$332m1.10m+4.3%added
Oxford Asset Management LLP Hedge fund0.2%$411k1,364–new
Jain Global LLC Hedge fund0.2%$16.8m55,686+16%added
CenterBook Partners LP Hedge fund0.2%$3.7m12,173–new
Campbell & CO Investment Adviser LLC Hedge fund0.2%$3.4m11,183–new
Aquatic Capital Management LLC Hedge fund0.2%$4.7m15,480−50%reduced
AlphaGrep UK Ltd Hedge fund0.1%$489k1,623+69%added
Militia Capital Management LLC Hedge fund0.1%$771k2,560–new
Squarepoint Ops LLC Hedge fund0.1%$70.4m233,999−45%reduced
Engineers Gate Manager LP Hedge fund0.1%$10.1m33,469+3.0%added
111 Capital Hedge fund0.1%$726k2,412+262%added
Bridgewater Associates, LP Hedge fund0.1%$30.0m99,584−6.6%reduced
Machina Capital S.A.S. Hedge fund0.1%$703k2,335–new
FORA Capital, LLC Hedge fund0.1%$1.6m5,209+17%added
Orbimed Advisors LLC Hedge fund0.10%$5.1m17,000−86%reduced