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Which hedge funds own SION? SIONNA THERAPEUTICS INC, Q2 2026 13F holders

HealthcareBiotechnology

36 tracked hedge funds disclosed a position in SION (SIONNA THERAPEUTICS INC) in their Q2 2026 13F filings, worth $1.0bn in total. The largest holder by portfolio weight is RA Capital Management, L.P. at 3.8% of its book. 8 opened a new position this quarter: Casdin Capital, LLC, Sofinnova Investments, Inc., Engineers Gate Manager LP, Trexquant Investment LP. 5 exited: Cygnus Capital Advisors, LLC, Polen Capital, ExodusPoint Capital Management, LP.

36
Holders
Tracked managers whose filing for the quarter reports a long equity position in the security.
8
New this quarter
Holders whose previous filing (at most two quarters earlier) did not report the security.
5
Exited this quarter
Tracked managers whose previous filing reported the security and whose filing for the quarter does not.
$31.9m
Inflow, new holders
Combined value of the positions the new holders reported for the quarter.
$2.0m
Outflow, exits
Combined value the exiting managers reported for the security in their previous filing.
$1.0bn
Combined value
Sum of the holders' reported positions in the security.
2.9%
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

36 rows
RA Capital Management, L.P. Hedge fund3.8%$436m9.91m0.0%held
GordonMD Global Investments LP Hedge fund2.9%$6.0m136,0000.0%held
Orbimed Advisors LLC Hedge fund2.1%$112m2.56m−28%reduced
Superstring Capital Management LP Hedge fund1.8%$2.8m63,156−55%reduced
Artia Global Partners LP Hedge fund1.0%$5.3m119,7410.0%held
Ishara Investments LP Hedge fund1.0%$1.4m123,000+150%added
Sio Capital Management, LLC Hedge fund1.0%$5.6m127,808−57%reduced
Casdin Capital, LLC Hedge fund0.9%$17.6m400,000–new
Perceptive Advisors LLC Hedge fund0.6%$39.8m905,000+37%added
Stempoint Capital LP Hedge fund0.5%$2.6m59,426+63%added
Viking Global Investors LP Hedge fund0.4%$141m3.20m0.0%held
Sofinnova Investments, Inc. Hedge fund0.3%$6.4m144,432–new
Deerfield Management Company, L.P. Hedge fund0.3%$30.0m680,916−30%reduced
Soleus Capital Management, L.P. Hedge fund0.3%$7.8m177,687−39%reduced
Rock Springs Capital Management LP Hedge fund0.2%$4.4m99,4290.0%held
Silverarc Capital Management, LLC Hedge fund0.2%$1.9m42,478+7.8%added
Integral Health Asset Management, LLC Hedge fund0.1%$3.3m75,000+50%added
Adage Capital Partners GP, L.L.C. Hedge fund0.10%$70.4m1.60m+967%added
Seven Grand Managers, LLC Hedge fund0.09%$2.2m50,0000.0%held
Baker Bros. Advisors LP Hedge fund0.09%$17.6m400,0000.0%held
Quarry LP Hedge fund0.05%$297k6,750+7.1%added
Candriam S.C.A. Hedge fund0.05%$10.2m233,208−1.5%reduced
Citadel Advisors LLC Hedge fund0.03%$50.5m1.15m−1.7%reduced
Walleye Capital LLC Hedge fund0.02%$4.3m97,347+545%added
Alyeska Investment Group, L.P. Hedge fund0.02%$6.0m136,2220.0%held
Engineers Gate Manager LP Hedge fund0.01%$686k15,603–new
Millennium Management LLC Hedge fund0.01%$12.2m276,733+97%added
Qube Research & Technologies Ltd Hedge fund0.01%$6.2m140,309+232%added
Trexquant Investment LP Hedge fund0.01%$1.0m23,810–new
Tudor Investment Corp ET AL Hedge fund0.0%$993k22,575–new
Point72 Asset Management, L.P. Hedge fund0.0%$2.2m49,328−64%reduced
Quantbot Technologies LP Hedge fund0.0%$80.1k1,820+922%added
D. E. Shaw & Co., Inc. Hedge fund0.0%$4.5m101,644–new
Jain Global LLC Hedge fund0.0%$210k4,780–new
Marshall Wace, LLP Hedge fund0.0%$554k12,599–new
Squarepoint Ops LLC Hedge fund0.0%$238k5,415−64%reduced