Back to stocks
SION

SION

Sionna Therapeutics, Inc.Healthcare

Institutional holders
133
As of Q2 2026
Total 13F value
$2.1B
Sum of disclosed positions
New positions
35
This quarter
Sold positions
7
This quarter

Top holders

Institutions with disclosed positions in this stock

FundValueShares% PortfolioChange
RA CAPITAL MANAGEMENT, L.P.

Ra Capital Management, L.P.

$435.7M9.91M3.79%Unchanged
TPG GP A, LLC

Tpg Gp A, Llc

$285.7M6.49M5.71%Unchanged
VIKING GLOBAL INVESTORS LP

Viking Global Investors

$140.6M3.20M0.40%Unchanged
Atlas Venture Life Science Advisors, LLC

Atlas Venture Life Science Advisors, Llc

$131.8M3.00M14.95%Unchanged
ORBIMED ADVISORS LLC

Orbimed Advisors Llc

$112.4M2.56M2.08%-27.6%
Enavate Sciences GP, LLC

Enavate Sciences Gp, Llc

$109M2.48M31.56%Unchanged
CITADEL ADVISORS LLC

Citadel Advisors

$101M2.30M0.01%-1.6%
ADAGE CAPITAL PARTNERS GP, L.L.C.

Adage Capital Partners Gp, L.L.C.

$70.4M1.60M0.10%+966.7%
BlackRock, Inc.

Blackrock, Inc.

$64.9M1.47M0.00%+13.8%
JPMORGAN CHASE & CO

Jpmorgan Chase

$64.1M1.49M0.00%New Position
VANGUARD CAPITAL MANAGEMENT LLC

Vanguard Capital Management Llc

$49.8M1.13M0.00%+10.0%
STATE STREET CORP

State Street Corporation

$44.9M1.02M0.00%+35.1%
PERCEPTIVE ADVISORS LLC

Perceptive Advisors Llc

$39.8M905.0K0.60%+37.5%
DEERFIELD MANAGEMENT COMPANY, L.P.

Deerfield Management Company, L.P. (Series C)

$30M680.9K0.31%-29.9%
Siren, L.L.C.

Siren, L.L.C.

$26.9M610.5K0.54%+103.5%
PRICE T ROWE ASSOCIATES INC /MD/

Price T Rowe Associates Inc /Md/

$21M478.0K0.00%-36.8%
EVENTIDE ASSET MANAGEMENT, LLC

Eventide Asset Management, Llc

$20.9M475.0K0.28%-26.4%
GEODE CAPITAL MANAGEMENT, LLC

Geode Capital Management, Llc

$20.1M457.1K0.00%+17.3%
Casdin Capital, LLC

Casdin Capital, Llc

$17.6M400.0K0.88%New Position
BAKER BROS. ADVISORS LP

Baker Bros. Advisors Lp

$17.6M400.0K0.09%Unchanged
Kalehua Capital Management LLC

Kalehua Capital Management Llc

$17.3M394.1K6.21%Unchanged
GOLDMAN SACHS GROUP INC

Goldman Sachs Group

$17.1M388.8K0.00%+47.7%
DRIEHAUS CAPITAL MANAGEMENT LLC

Driehaus Capital Management Llc

$17M385.4K0.10%+403.0%
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

California State Teachers Retirement System

$15.5M668.2K0.00%+75169.5%
FRANKLIN RESOURCES INC

Franklin Resources Inc

$12.8M290.1K0.00%+65.3%
FMR LLC

Fmr Llc

$12.2M278.3K0.00%+241.9%
MILLENNIUM MANAGEMENT LLC

Millennium Management

$12.2M276.7K0.00%+96.8%
Candriam S.C.A.

Candriam S.C.A.

$10.2M233.2K0.05%-1.5%
VANGUARD PORTFOLIO MANAGEMENT LLC

Vanguard Portfolio Management Llc

$9.8M222.9K0.00%+56.9%
Longaeva Partners L.P.

Longaeva Partners L.P.

$8.6M196.4K0.19%+1446.9%
Artisan Partners Limited Partnership

Artisan Partners Limited Partnership

$8.3M189.5K0.01%New Position
Ensign Peak Advisors, Inc

Ensign Peak Advisors, Inc

$8.1M184.5K0.01%-27.8%
Soleus Capital Management, L.P.

Soleus Capital Management, L.P.

$7.8M177.7K0.27%-39.5%
NORTHERN TRUST CORP

Northern Trust Corp

$6.8M154.5K0.00%+32.3%
MORGAN STANLEY

Morgan Stanley

$6.6M151.0K0.00%+13.6%
Sofinnova Investments, Inc.

Sofinnova Investments, Inc.

$6.4M144.4K0.33%New Position
Qube Research & Technologies Ltd

Qube Research & Technologies Ltd

$6.2M140.3K0.01%+232.2%
Alyeska Investment Group, L.P.

Alyeska Investment Group, L.P.

$6M136.2K0.02%Unchanged
GordonMD Global Investments LP

Gordonmd Global Investments Lp

$6M136.0K2.89%Unchanged
Sixth Street Partners Management Company, L.P.

Sixth Street Partners Management Company, L.P.

$5.7M129.8K0.00%New Position
CHARLES SCHWAB INVESTMENT MANAGEMENT INC

Charles Schwab Investment Management Inc

$5.7M129.8K0.00%+7.9%
Sio Capital Management, LLC

Sio Capital Management, Llc

$5.6M127.8K0.93%-56.6%
VANGUARD FIDUCIARY TRUST CO

Vanguard Fiduciary Trust Co

$5.3M121.4K0.00%+8.3%
Artia Global Partners LP

Artia Global Partners Lp

$5.3M119.7K0.97%Unchanged
UBS Group AG

Ubs Group Ag

$5.1M116.2K0.00%-21.3%
First Turn Management, LLC

First Turn Management, Llc

$4.9M110.5K0.52%New Position
D. E. Shaw & Co., Inc.

D.E. Shaw & Co

$4.5M101.6K0.00%New Position
Rock Springs Capital Management LP

Rock Springs Capital Management Lp

$4.4M99.4K0.21%Unchanged
Walleye Capital LLC

Walleye Capital Llc

$4.3M97.3K0.02%+544.8%
Rhenman & Partners Asset Management AB

Rhenman & Partners Asset Management Ab

$4.3M97.1K0.40%+11.0%

Explore