Companies / Gossamer Bio, Inc.

Gossamer Bio, Inc.

Nasdaq: GOSSCIK 1728117SAN DIEGO, CA

Financials · FY2025

Revenue$48.47M
Net income$-170.37M
Total debt$11.61M
Cash$41.15M
Diluted EPS$-0.75
Shares outstanding234.7M

Ownership

234.7M shares outstanding · as of May 12, 2026
1.3%Insiders
Ownership
Insiders1.29%3,024,928
10%+ / strategic12.87%30,207,133
Institutions68.98%161,903,859
Public float16.86%39,560,361

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 6

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Insider% of sharesShares
Hasnain FaheemCEOPresident & CEO · Director
0.36%837,793
Christian WaageEVP, Tech Ops and Admin
0.35%814,061
Aranda RichardChief Medical Officer
0.20%463,106
Giraudo BryanCOO/CFO
0.17%389,737
Smith Robert Paul JRChief Commercial Officer
0.11%260,898
Peterson CarynEVP, Regulatory Affairs
0.11%259,333

Institutional holders 201

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HolderValue% of shares
NEA Management Company, LLC$56.09M7.71%
Octagon Capital Advisors LP$43.14M5.93%
Vanguard Group Inc$39.91M5.49%
Samsara BioCapital, LLC$22.39M3.08%
Siren, L.L.C.$16.15M2.22%
683 Capital Management, LLC$16.09M2.21%
Hhlr Advisors, Ltd.$15.42M2.12%
Palo Alto Investors LP$13.86M1.91%
Fmr LLC$13.14M1.81%
Corient Private Wealth LLC$11.92M1.64%

Activity

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InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Jan 2, 2026Giraudo Bryan
Executive
GrantCommon Stock$0+116K
+42.25%
389,737
0.17% of shares
low
Jan 2, 2026Smith Robert Paul JR
Executive
GrantCommon Stock$0+94K
+56.09%
260,898
0.11% of shares
low
Jan 2, 2026Aranda Richard
Executive
GrantCommon Stock$0+94K
+25.38%
463,106
0.20% of shares
low
Jan 2, 2026Peterson Caryn
Executive
GrantCommon Stock$0+85K
+48.33%
259,333
0.11% of shares
low
Jan 2, 2026Christian Waage
Executive
GrantCommon Stock$0+85K
+11.58%
814,061
0.35% of shares
low
Jan 2, 2026Hasnain Faheem
CEO
GrantCommon Stock$0+280K
+50.20%
837,793
0.36% of shares
low
Mar 19, 2026Giraudo Bryan
Executive
GrantStock Option (Right to Buy)—+97K
96,667
0.04% of shares
low
Mar 19, 2026Giraudo Bryan
Executive
GrantStock Option (Right to Buy)—+48K
47,667
0.02% of shares
low

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Vanguard Group IncPassive13G/A—0—
683 Capital Management, LLCPassive13G/A———
683 Capital Management, LLCPassive13G———
BlackRock, Inc.Passive13G/A—15,065,708—
Octagon Capital Advisors LPPassive13G/A—15,141,425—
Context Capital Management, LLCPassive13G———

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
GOSS——38341P102—