Institutional shares held 163 Million
8.11M calls
211K puts
Total value of holdings $443M
$22M calls
$570K puts
Market Cap $255M
93,954,000 Shares Out.
Institutional ownership 173.8%
# of Institutions 181


Latest Institutional Activity in GOSS

Top Purchases

Q3 2025
Perceptive Advisors LLC Shares Held: 3.81M ($10.3M)
Q3 2025
Millennium Management LLC Shares Held: 3.62M ($9.81M)
Q3 2025
Bank Of America Corp Shares Held: 2.88M ($7.81M)
Q3 2025
Ubs Group Ag Shares Held: 2.77M ($7.51M)
Q3 2025
Citadel Advisors LLC Shares Held: 2.28M ($6.19M)

Top Sells

Q3 2025
Ci Private Wealth, LLC Shares Held: 20K ($54.2K)
Q3 2025
Alyeska Investment Group, L.P. Shares Held: 1.91M ($5.17M)
Q3 2025
Monaco Asset Management Sam Shares Held: 1.38M ($3.74M)
Q3 2025
Acadian Asset Management LLC Shares Held: 5.01M ($13.6M)
Q3 2025
Octagon Capital Advisors LP Shares Held: 17.1M ($46.2M)

About GOSS

Gossamer Bio, Inc., a clinical-stage biopharmaceutical company, focuses on discovering, acquiring, developing, and commercializing therapeutics in the disease areas of immunology, inflammation, and oncology in the United States. The company is developing GB002, an inhaled, small molecule, platelet-derived growth factor receptor, or PDGFR, colonystimulating factor 1 receptor, or CSF1R, and c-KIT inhibitor for the treatment of pulmonary arterial hypertension; GB004, a gut-targeted, oral small molecule for the treatment of inflammatory bowel disease; GB5121, an oral, irreversible, covalent, small molecule inhibitor of Bruton's Tyrosine Kinase for the treatment of primary central nervous system lymphoma; and GB7208, an oral, small molecule, BTK inhibitor for the treatment of multiple sclerosis. It has license agreements with Pulmokine, Inc. to develop and commercialize GB002 and related backup compounds; and Aerpio Pharmaceuticals, Inc. to develop and commercialize GB004 and related compounds. The company was formerly known as FSG, Bio, Inc. and changed its name to Gossamer Bio, Inc. in 2017. Gossamer Bio, Inc. was incorporated in 2015 and is headquartered in San Diego, California.


Insider Transactions at GOSS

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
1.22M Shares
From 7 Insiders
Grant, award, or other acquisition 1.19M shares
Open market or private purchase 26.1K shares
Sell / Disposition
0 Shares
From 0 Insiders

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