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Gossamer BIO Inc (GOSS)

CUSIP: 38341P102 | NYSE | Healthcare · Biotechnology | Micro Cap | 512 institutional holders

Quarters

Q3 2026Q2 2026Q1 2026Q4 2025Q3 2025
CompareDetailedHistoricalFundsOptions13D/13GPeersTargetingTrading SummaryProfile

Beneficial Ownership — 13D / 13G

Full history →

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

HolderShares% of ClassChangeEvent Datevs 13F
13D/AD. E. Shaw & Co., L.L.C.
with D. E. Shaw Valence Portfolios, L.L.C.
29,128,1946.0%−5,220,764Aug 20, 2026No 13F filer matched
13GOpaleye Management Inc.
with Opaleye, L.P.
24,942,5655.1%New 5%+ stakeJul 22, 2026No 13F filer matched
13D/AGrowth Equity Opportunities 18 VGE, LLC4,065,1341.7%Newly reportedFeb 23, 2026No 13F filer matched
13D/AD. E. Shaw & Co., L.L.C.29,128,194
6.0% of class · Aug 20, 2026−5,220,764
with D. E. Shaw Valence Portfolios, L.L.C.
No 13F filer matched
13GOpaleye Management Inc.24,942,565
5.1% of class · Jul 22, 2026New 5%+ stake
with Opaleye, L.P.
No 13F filer matched
13D/AGrowth Equity Opportunities 18 VGE, LLC4,065,134
1.7% of class · Feb 23, 2026Newly reported
No 13F filer matched

Institutional Holders — Q3 2026

IFP Advisors, Inc98
0.0% of portfolio›$14
StyleTurnoverLocationFiled
IFP Advisors, Inc
98$140.0%GrowthLowTampa, FL2026-10-16