Gossamer Bio Inc

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Gossamer Bio Inc
TickerGOSS
CIK #0001728117
CUSIP38341P102
SectorLife Sciences - Pharmaceutical Preparations
Address3013 Science Park, San Diego, CA 92121
Source [EDGAR]
CIK Filing 2011 - 2025
[0001728117] 10-K
[0001728117] 10-Q
[0001728117] 3
[0001728117] 4
[0001728117] 8-K
[0001728117] D
[0001728117] SC 13D
[0001728117] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Vanguard Group Inc Gossamer Bio Inc [2025-07-29] 0.0
BlackRock Inc Gossamer Bio Inc [2025-07-17] 0.0
Octagon Capital Advisors LP Gossamer Bio Inc [2025-02-05] 0.0
FMR LLC Gossamer Bio Inc [2024-02-09] 0.0
Artal International SCA Gossamer Bio Inc [2024-01-11] 5.8
Growth Equity Opportunities 18 VGE LLC Gossamer Bio Inc [2023-07-28] 8.2
State Street Corp Gossamer Bio Inc [2023-01-10] 29.47
Millennium Management LLC Gossamer Bio Inc [2023-01-04] 5.1
Millennium Management LLC Gossamer Bio Inc [2022-12-20] 3.6
Gossamer Bio Inc Hasnain Faheem [2021-02-12] 4.6
Gossamer Bio Inc Gujrathi Sheila [2021-02-12] 4.8
BlackRock Inc Gossamer Bio Inc [2021-02-02] 6.2
Hillhouse Capital Advisors Ltd Gossamer Bio Inc [2020-02-14] 0.0
Omega Fund V LP Gossamer Bio Inc [2020-02-14] 9.3
Arch Venture Fund IX LP Gossamer Bio Inc [2020-02-13] 12.2
Vanguard Group Inc Gossamer Bio Inc [2020-02-11] 5.64
Hasnain Faheem Gossamer Bio Inc [2020-02-10] 5.1
Gujrathi Sheila Gossamer Bio Inc [2020-02-10] 6.1
BlackRock Inc Gossamer Bio Inc [2020-02-07] 5.4
Form 3/4/5 Filer 2011 - 2025
Milligan Sandra
Gossamer Bio, Inc.
Daniel Thomas O
Drynan Skye
Cox Russell J.
Quisel John D
Nathan Steven D
Giraudo Bryan
Peterson Caryn
Christian Waage
Smith Robert Paul JR
Aranda Richard
Hasnain Faheem
Burow Kristina
GALA Renee D
Carter Laura
Bilenker Joshua H.
Salter-Cid Luisa
Dupont Jakob
Gujrathi Sheila
Omega Fund V GP Manager, Ltd.
Omega Fund V, L.P.
Omega Fund V GP, L.P.
Stampacchia Otello
Crandell Keith
ARCH Venture Partners IX Overage, L.P.
ARCH Venture Partners IX, L.P.
ARCH Venture Fund IX, L.P.
ARCH Venture Partners IX, LLC
Bybee Clinton
Nelsen Robert
ARCH Venture Fund IX Overage, L.P.
Form 13F Holdings
Firm Period DFND Voting Shares
Octagon Capital Advisors LP [2025-06-30] SOLE 18,350,000 18,350,000
NEA Management Company LLC [2025-06-30] DFND 18,093,034 18,093,034
BlackRock, Inc. [2025-06-30] SOLE 11,974,862 12,142,596
Vanguard Group Inc [2025-06-30] SOLE 0 11,157,178
Arch Venture Management LLC [2025-06-30] SOLE 0 8,055,916
FMR LLC [2025-06-30] DFND 7,296,507 7,315,325
683 Capital Management LLC [2025-06-30] DFND 6,640,100 6,640,100
Samsara Biocapital LLC [2025-06-30] SOLE 6,130,268 6,130,268
Palo Alto Investors LP [2025-06-30] SOLE 5,739,013 5,739,013
Siren, L.L.C. [2025-06-30] DFND 5,208,968 5,208,968
SilverArc Capital Management LLC [2025-06-30] SOLE 5,146,782 5,146,782
HHLR Advisors Ltd [2025-06-30] OTR 0 4,974,041
Geode Capital Management LLC [2025-06-30] DFND 4,555,080 4,555,080
Alyeska Investment Group LP [2025-06-30] SOLE 4,459,087 4,459,087
Corient Private Wealth LLC [2025-06-30] SOLE 3,666,283 3,693,683
Monaco Asset Management SAM [2025-06-30] SOLE 3,550,000 3,550,000
Opaleye Management Inc [2025-06-30] SOLE 3,545,000 3,545,000
Rock Springs Capital Management LP [2025-06-30] SOLE 3,266,960 3,266,960
Renaissance Technologies LLC [2025-06-30] SOLE 2,732,294 2,732,294
State Street Corp [2025-06-30] DFND 2,199,628 2,481,406
Deutsche Bank AG [2025-06-30] DFND 4,054 2,261,455
Two Sigma Investments LP [2025-06-30] SOLE 1,745,127 1,745,127
Eversept Partners LP [2025-06-30] SOLE 1,695,762 1,695,762
Two Sigma Advisers LP [2025-06-30] SOLE 1,614,500 1,672,200
Charles Schwab Investment Management Inc [2025-06-30] SOLE 1,621,419 1,621,419
Susquehanna International Group LLP [2025-06-30] OTR 382,677 1,608,377
Northern Trust Corp [2025-06-30] DFND 1,490,446 1,491,071
Platinum Investment Management Ltd [2025-06-30] SOLE 1,383,863 1,383,863
Laurion Capital Management LP [2025-06-30] SOLE 1,343,772 1,343,772
Focus Partners Wealth [2025-06-30] SOLE 0 1,150,000
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