Sionna Therapeutics Inc

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Sionna Therapeutics Inc
TickerSION
CIK #0002036042
CUSIP829401108
SectorLife Sciences - Pharmaceutical Preparations
Address21 Hickory Drive, Suite 500, Waltham, MA 02451
Source [EDGAR]
CIK Filing 2011 - 2025
[0002036042] 10-K
[0002036042] 10-Q
[0002036042] 3
[0002036042] 4
[0002036042] 8-K
[0002036042] SC 13D
[0002036042] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
JPMorgan Chase & Co Sionna Therapeutics Inc [2025-07-30] 0.0
Qatar Investment Authority Sionna Therapeutics Inc [2025-06-16] 0.0
Atlas Venture Fund Xi LP Sionna Therapeutics Inc [2025-02-18] 0.0
RA Capital Management LP Sionna Therapeutics Inc [2025-02-18] 0.0
Enavate Sciences GP LLC Sionna Therapeutics Inc [2025-02-18] 0.0
TPG GP A LLC Sionna Therapeutics Inc [2025-02-18] 0.0
Viking Global Investors LP Sionna Therapeutics Inc [2025-02-14] 0.0
OrbiMed Advisors LLC Sionna Therapeutics Inc [2025-02-13] 0.0
Form 3/4/5 Filer 2011 - 2025
TPG GP A LLC
Winkelried Jon
Coulter James G
Sionna Therapeutics, Inc.
Viney Joanne L.
Thompson Peter A.
Stelzer Laurie
Ruddy Marcella K.
Resnick Joshua
Fleming Harold Edward
Clancy Paul J
Booth Bruce
RA Capital Management LP
Kolchinsky Peter
RA Capital Nexus Fund, L.P.
RA Capital Healthcare Fund LP
RA Capital Nexus Fund III, L.P.
Shah Rajeev M.
Fitzpatrick Jennifer
Ridloff Elena
OrbiMed Advisors LLC
OrbiMed Capital GP VIII LLC
McKee Charlotte
Atlas Venture Associates Opportunity II, LP
Atlas Venture Associates XI, L.P.
Atlas Venture Fund XI, L.P.
Atlas Venture Opportunity Fund II, L.P.
Atlas Venture Associates Opportunity II, LLC
Atlas Venture Associates XI, LLC
Cloonan Michael
Iancovici Lucian
Form 13F Holdings
Firm Period DFND Voting Shares
RA Capital Management LP [2025-06-30] SOLE 10,445,322 10,445,322
TPG GP A LLC [2025-06-30] DFND 6,744,962 6,744,962
OrbiMed Advisors LLC [2025-06-30] SOLE 3,704,959 3,704,959
Atlas Venture Life Science Advisors LLC [2025-06-30] SOLE 3,694,020 3,694,020
Viking Global Investors LP [2025-06-30] SOLE 3,195,181 3,195,181
Enavate Sciences GP, LLC [2025-06-30] SOLE 2,478,030 2,478,030
JPMorgan Chase & Co [2025-06-30] DFND 1,978,546 2,221,188
Perceptive Advisors LLC [2025-06-30] SOLE 1,216,045 1,216,045
Braidwell LP [2025-06-30] SOLE 1,081,855 1,081,855
Deerfield Management Company LP [2025-06-30] DFND 970,590 970,590
Aberdeen Group plc [2025-06-30] DFND 950,547 950,547
Jennison Associates LLC [2025-06-30] DFND 752,800 752,800
BlackRock, Inc. [2025-06-30] SOLE 628,776 637,104
Vanguard Group Inc [2025-06-30] SOLE 0 615,085
Franklin Resources Inc [2025-06-30] DFND 500,023 500,023
Baker Bros Advisors LP [2025-06-30] SOLE 400,000 400,000
Soleus Capital Management LP [2025-06-30] SOLE 376,000 376,000
Siren, L.L.C. [2025-06-30] DFND 325,000 325,000
Geode Capital Management LLC [2025-06-30] DFND 289,275 289,275
Ameriprise Financial Inc [2025-06-30] DFND 0 236,813
Alyeska Investment Group LP [2025-06-30] SOLE 186,222 186,222
SilverArc Capital Management LLC [2025-06-30] SOLE 186,015 186,015
Prudential Financial Inc [2025-06-30] DFND 134,625 135,185
Citadel Advisors LLC [2025-06-30] DFND 129,912 129,912
State Street Corp [2025-06-30] DFND 118,768 124,518
Rock Springs Capital Management LP [2025-06-30] SOLE 99,429 99,429
Charles Schwab Investment Management Inc [2025-06-30] SOLE 92,832 92,832
Northern Trust Corp [2025-06-30] DFND 90,009 90,009
Driehaus Capital Management LLC [2025-06-30] SOLE 83,850 83,850
Woodline Partners LP [2025-06-30] SOLE 80,000 80,000
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