Institutional shares held 164 Million
8.11M calls
211K puts
Total value of holdings $444M
$22M calls
$570K puts
Market Cap $255M
93,954,000 Shares Out.
Institutional ownership 174.51%
# of Institutions 184


Latest Institutional Activity in GOSS

Top Purchases

Q4 2025
Hennion & Walsh Asset Management, Inc. Shares Held: 653K ($1.77M)
Q4 2025
Sg Americas Securities, LLC Shares Held: 74.1K ($201K)
Q4 2025
North Crest Asset Manangement, LLC Shares Held: 11.5K ($31.1K)
Q4 2025
Wealth Enhancement Advisory Services, LLC Shares Held: 24K ($64.9K)
Q4 2025
Nisa Investment Advisors, LLC Shares Held: 2.01K ($5.46K)

Top Sells

Q4 2025
Rialto Wealth Management, LLC Shares Held: 5.75K ($15.6K)
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)

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
1.97M Shares
From 7 Insiders
Grant, award, or other acquisition 1.95M shares
Open market or private purchase 26.1K shares
Sell / Disposition
0 Shares
From 0 Insiders

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