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Livermore
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Gossamer Bio, Inc.

GOSS
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001728117

No open-market purchases or sales by Gossamer Bio, Inc. insiders were filed in the last 90 days; 170 institutions reported holding it in 13F filings for Q2 2026, worth $60.8M in total; HHLR Advisors (Hillhouse) is the only superinvestor holding it.

Q3 2025 vs. Q2 2025

How the institutions holding Gossamer Bio, Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025All holders in Q2 2025

13F holders of GOSS: Q2 2025 compared with Q3 2025
MeasureQ2 2025Of which not filed for Q3 2025Q3 2025Change
Holders1241164+41
Shares176.8M23.4K180.1M+3.30M (+1.9%)
Value$218.0M$28.8K$473.7M+$255.7M (+117.3%)

1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (56)

Institutions that held Gossamer Bio, Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to GOSS in Q3 2025
InstitutionSharesValue% of portfolio
Perceptive Advisors LLC3,812,797$10.0M0.29%
MB Generational Wealth, LLC1,414,824$3.72M2.36%
Jain Global LLC1,054,356$2.77M0.04%
Tang Capital Management LLC800,000$2.10M0.08%
Balyasny Asset Management LLC770,574$2.03M0.00%
Adage Capital Partners GP, L.L.C.726,800$1.91M0.00%
Jane Street Group, LLC702,065$1.85M0.00%
Russell Investments Group, Ltd.685,049$1.80M0.00%
AQR Capital Management LLC646,615$1.70M0.00%
Wellington Management Group LLP641,715$1.69M0.00%
Walleye Capital LLC545,679$1.44M0.01%
EAM Investors, LLC278,422$732.3K0.08%
Stonepine Capital Management, LLC204,770$538.5K0.44%
Cubist Systematic Strategies, LLC162,785$428.1K0.01%
Merit Financial Group, LLC134,688$354.2K0.00%
HB Wealth Management, LLC94,748$249.2K0.00%
SEI Investments Co61,186$160.9K0.00%
Omers Administration Corp59,100$155.4K0.00%
EntryPoint Capital, LLC51,264$134.8K0.05%
Axq Capital, LP46,367$121.9K0.05%
Letko, Brosseau & Associates Inc39,400$103.6K0.00%
DLD Asset Management, LP37,543$98.7K0.01%
Bank of Nova Scotia35,000$92.0K0.00%
Panagora Asset Management Inc29,899$78.6K0.00%
Gerber, LLC28,249$74.3K0.05%
Connor, Clark & Lunn Investment Management Ltd.25,449$66.9K0.00%
CWM, LLC25,017$66.0K0.00%
Mariner, LLC22,469$59.1K0.00%
Caitong International Asset Management Co., Ltd21,637$56.9K0.04%
SG Americas Securities, LLC21,195$56.0K0.00%
CIBC Bancorp USA Inc.20,246$53.2K0.00%
Evernest Financial Advisors, LLC20,000$52.6K0.01%
HighTower Advisors, LLC19,501$51.3K0.00%
Voleon Capital Management LP19,500$51.3K0.00%
Fullcircle Wealth LLC22,100$50.8K0.02%
Susquehanna Portfolio Strategies, LLC18,900$49.7K0.00%
Creative Planning18,655$49.1K0.00%
Wealth Enhancement Advisory Services, LLC19,197$48.0K0.00%
Two Sigma Securities, LLC16,337$43.0K0.01%
Kestra Advisory Services, LLC16,000$42.1K0.00%
Mercer Global Advisors Inc15,744$41.4K0.00%
Brevan Howard Capital Management LP14,093$37.1K0.00%
Brighton Jones LLC13,754$36.2K0.00%
Wolverine Trading, LLC11,793$33.3K0.00%
SRS Capital Advisors, Inc.10,859$28.6K0.00%
GTS Securities LLC10,627$27.9K0.00%
MML Investors Services, LLC10,360$27.2K0.00%
Ciovacco Capital Management LLC10,204$26.8K0.01%
Rockefeller Capital Management L.P.10,200$26.8K0.00%
Essential Partners LLC1,477$3.88K0.00%
Allworth Financial LP991$2.61K0.00%
EverSource Wealth Advisors, LLC468$1.23K0.00%
The PNC Financial Services Group, Inc.289$7600.00%
True Wealth Design, LLC207$5450.00%
IFP Advisors, Inc159$4180.00%
Farther Finance Advisors, LLC70$1840.00%

Sold out (15)

Institutions that held Gossamer Bio, Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Institutions that sold out of GOSS in Q3 2025
InstitutionShares, Q2 2025Value, Q2 2025
Laurion Capital Management LP1,343,772$1.65M
Schonfeld Strategic Advisors LLC897,388$1.10M
DAFNA Capital Management LLC849,921$1.05M
Highbridge Capital Management LLC497,694$612.2K
Ameriprise Financial Inc434,049$533.9K
Opti Capital Management, LP–$509.4K
Susquehanna International Group, LLP382,677$470.7K
State of Wyoming105,175$129.4K
Diametric Capital, LP89,382$109.9K
Silvercrest Asset Management Group LLC26,158$32.2K
Caption Management, LLC25,480$31.3K
US Bancorp24,100$29.6K
Banco BTG Pactual S.A.22,009$27.1K
Dauntless Investment Group, LLC10,000$12.3K
Raymond James Financial Inc270$332

Not filed for Q3 2025 yet (1)

Institutions that held Gossamer Bio, Inc. at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding GOSS in Q2 2025 that haven't filed for Q3 2025
InstitutionShares, Q2 2025Value, Q2 2025
CIBC World Markets Corp23,401$28.8K