GOSS logo

Gossamer Bio, Inc.

GOSS
Healthcare|Biotechnology|US
$9.77
+0.35 (+3.72%)
DCF Value
$117.58
Cash / Share
$20.66

Ownership Breakdown

26.3%
Float
6.1M
Shares Outstanding
1.6M
Float Shares

Major Holders (40)

Combined: 216.4%

Holders of 5%+ from their latest Schedule 13D/13G filing in the last two years. Percentages are as of each filing date.

HolderType% of ClassSharesFiledFiling
Abigail P. JohnsonIndividual10.90%667,465Nov 6, 202613D/G
FMR LLCHolding company10.90%667,465Nov 6, 202613D/G
Ari ZweimanIndividual9.99%49,868,571Jun 11, 202613D/G
683 Capital Management, LLCInvestment adviser9.99%49,868,571Jun 11, 202613D/G
683 Capital Partners, LPPartnership9.99%49,868,571Jun 11, 202613D/G
Michael S. RosenHC, IN9.90%48,835,788Jun 9, 202613D/G
Context Capital Management, LLCIA, OO9.90%48,835,788Jun 9, 202613D/G
Context Partners Master Fund, L.P.Partnership9.90%48,835,788Jun 9, 202613D/G
William D. FertigHC, IN9.90%48,835,788Jun 9, 202613D/G
Charles E. CarnegieHC, IN9.90%48,835,788Jun 9, 202613D/G
Octagon Investments Master FundPN, OO8.60%19,576,054Feb 5, 202513D/G
DeepCurrents Investment Group LLCInvestment adviser7.70%37,665,073Jun 11, 202613D/G
Kai ZhengHC, IN7.70%37,665,073Jun 11, 202613D/G
Opaleye Management Inc.IA, CO6.98%426,989Nov 6, 202613D/G
James SilvermanIndividual6.98%426,989Nov 6, 202613D/G
Opaleye, L.P.Partnership6.79%415,000Nov 6, 202613D/G
Dcig GP LLCOther5.70%27,646,139Jun 11, 202613D/G
DCIG Capital Master Fund LPOther5.70%27,646,139Jun 11, 202613D/G
D. E. Shaw & Co., L.L.C.Other4.20%255,431Oct 29, 202613D/G
David E. ShawIndividual4.20%255,431Oct 29, 202613D/G
D. E. Shaw & Co., L.P.IA, PN4.20%255,431Oct 29, 202613D/G
D. E. Shaw Valence Portfolios, L.L.C.Other4.00%243,041Oct 29, 202613D/G
Ting JiaHC, IN3.80%8,976,054May 14, 202613D/G
Octagon Capital Advisors LPIA, PN3.80%8,976,054May 14, 202613D/G
Octagon Investments Master Fund LPPN, OO3.80%8,976,054May 14, 202613D/G
Invus Public Equities Advisors, LLCOther2.80%6,258,880Feb 12, 202513D/G
Invus Global Management, LLCOther2.80%6,258,880Feb 12, 202513D/G
Siren, L.L.C.Other2.80%6,258,880Feb 12, 202513D/G
Raymond DebbaneIndividual2.80%6,258,880Feb 12, 202513D/G
Invus Public Equities, L.P.Partnership2.80%6,258,880Feb 12, 202513D/G
NEA 18 Venture Growth Equity, L.P.Partnership1.70%4,065,134Feb 24, 202613D/G
Rick YangIndividual1.70%4,065,134Feb 24, 202613D/G
Paul WalkerIndividual1.70%4,065,134Feb 24, 202613D/G
Scott D. SandellIndividual1.70%4,065,134Feb 24, 202613D/G
Growth Equity Opportunities 18 VGE, LLCOther1.70%4,065,134Feb 24, 202613D/G
NEA Partners 18 VGE, L.P.Partnership1.70%4,065,134Feb 24, 202613D/G
Nea 18 Vge GP, LLCOther1.70%4,065,134Feb 24, 202613D/G
Ali BehbahaniIndividual1.70%4,065,134Feb 24, 202613D/G
Edward T. MathersIndividual1.70%4,065,134Feb 24, 202613D/G
Mohamad H. MakhzoumiIndividual1.70%4,065,134Feb 24, 202613D/G

Insider Trades (100)

Last 4 quarters: 49,734,827 acquired · 16,589,751 disposed
InsiderPositionDateTypeSharesPriceValueFiling
Milligan SandradirectorSep 23, 2026AWARD10,000$10.99$109.9KForm 4
Daniel Thomas OdirectorSep 23, 2026AWARD10,000$10.99$109.9KForm 4
Ciongoli Gregory AustindirectorSep 23, 2026AWARD30,000$10.99$329.7KForm 4
Drynan SkyedirectorSep 23, 2026AWARD10,000$10.99$109.9KForm 4
Quisel John DdirectorSep 23, 2026AWARD10,000$10.99$109.9KForm 4
Cox Russell J.directorSep 23, 2026AWARD10,000$10.99$109.9KForm 4
Nathan Steven DdirectorSep 23, 2026AWARD10,000$10.99$109.9KForm 4
Ciongoli Gregory AustindirectorAug 24, 2026OTHER250$0.00$0.03Form 4
Christian WaageEVP, Tech Ops and AdminAug 24, 2026AWARD2,900,026$0.17$507.5KForm 4
Peterson CarynChief Development OfficerAug 24, 2026AWARD5,800,051$0.17$1.0MForm 4
Smith Robert Paul JRChief Commercial OfficerAug 24, 2026AWARD5,800,051$0.17$1.0MForm 4
Giraudo BryanCOO/CFOAug 24, 2026AWARD5,800,051$0.17$1.0MForm 4
Giraudo BryanCOO/CFOAug 24, 2026AWARD25$0.00$0.00Form 4
Hasnain Faheemdirector, officer: President & CEOAug 24, 2026AWARD5,800,051$0.17$1.0MForm 4
Hasnain Faheemdirector, officer: President & CEOAug 24, 2026AWARD166$0.00$0.02Form 4
Quisel John DdirectorJun 4, 2026AWARD115,000$0.18$20.5KForm 4
Drynan SkyedirectorJun 4, 2026AWARD115,000$0.18$20.5KForm 4
Daniel Thomas OdirectorJun 4, 2026AWARD115,000$0.18$20.5KForm 4
Cox Russell J.directorJun 4, 2026AWARD115,000$0.18$20.5KForm 4
Milligan SandradirectorJun 4, 2026AWARD115,000$0.18$20.5KForm 4
Nathan Steven DdirectorJun 4, 2026AWARD115,000$0.18$20.5KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026AWARD572,000$0.45$257.4KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026AWARD562,500$0.45$253.1KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026AWARD487,500$0.45$219.4KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026AWARD162,500$0.45$73.1KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026AWARD157,500$0.45$70.9KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026AWARD126,667$0.45$57.0KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026AWARD40,000$0.45$18.0KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026AWARD30,000$0.45$13.5KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026AWARD22,784$0.45$10.3KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026AWARD20,000$0.45$9.0KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026AWARD9,167$0.45$4.1KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026DISPOSED157,500$1.21$190.6KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026DISPOSED162,500$0.84$136.2KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026DISPOSED487,500$0.97$472.9KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026DISPOSED562,500$2.88$1.6MForm 4
Aranda RichardChief Medical OfficerMar 19, 2026DISPOSED572,000$1.13$646.4KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026DISPOSED30,000$1.36$40.8KForm 4
Aranda RichardChief Medical OfficerMar 19, 2026DISPOSED157,500$2.16$340.2KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026AWARD506,250$0.45$227.8KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026AWARD440,000$0.45$198.0KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026AWARD375,000$0.45$168.8KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026AWARD157,500$0.45$70.9KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026AWARD126,667$0.45$57.0KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026AWARD125,000$0.45$56.3KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026AWARD32,334$0.45$14.6KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026AWARD22,784$0.45$10.3KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026AWARD21,167$0.45$9.5KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026AWARD18,834$0.45$8.5KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026AWARD9,167$0.45$4.1KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026DISPOSED506,250$2.88$1.5MForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026DISPOSED440,000$1.13$497.2KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026DISPOSED375,000$0.97$363.8KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026DISPOSED125,000$0.84$104.8KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026DISPOSED157,500$1.21$190.6KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026DISPOSED157,500$2.16$340.2KForm 4
Peterson CarynEVP, Regulatory AffairsMar 19, 2026DISPOSED32,334$1.36$44.0KForm 4
Smith Robert Paul JRChief Commercial OfficerMar 19, 2026AWARD572,000$0.45$257.4KForm 4
Smith Robert Paul JRChief Commercial OfficerMar 19, 2026AWARD562,500$0.45$253.1KForm 4
Smith Robert Paul JRChief Commercial OfficerMar 19, 2026DISPOSED562,500$2.88$1.6MForm 4
Smith Robert Paul JRChief Commercial OfficerMar 19, 2026DISPOSED572,000$1.13$646.4KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026AWARD1,680,000$0.45$756.0KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026AWARD1,540,000$0.45$693.0KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026AWARD1,312,500$0.45$590.6KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026AWARD650,000$0.45$292.5KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026AWARD544,500$0.45$245.0KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026AWARD437,500$0.45$196.9KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026AWARD325,000$0.45$146.3KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026AWARD47,000$0.45$21.1KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026AWARD43,500$0.45$19.6KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026DISPOSED43,500$22.10$961.4KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026DISPOSED47,000$12.10$568.7KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026DISPOSED325,000$9.79$3.2MForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026DISPOSED650,000$11.94$7.8MForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026DISPOSED544,500$2.16$1.2MForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026DISPOSED544,500$1.21$658.8KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026DISPOSED437,500$0.84$366.6KForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026DISPOSED1,312,500$0.97$1.3MForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026DISPOSED1,540,000$1.13$1.7MForm 4
Hasnain Faheemdirector, officer: President & CEOMar 19, 2026DISPOSED1,680,000$2.88$4.8MForm 4
Giraudo BryanCOO/CFOMar 19, 2026AWARD693,750$0.45$312.2KForm 4
Giraudo BryanCOO/CFOMar 19, 2026AWARD638,000$0.45$287.1KForm 4
Giraudo BryanCOO/CFOMar 19, 2026AWARD543,750$0.45$244.7KForm 4
Giraudo BryanCOO/CFOMar 19, 2026AWARD211,500$0.45$95.2KForm 4
Giraudo BryanCOO/CFOMar 19, 2026AWARD181,250$0.45$81.6KForm 4
Giraudo BryanCOO/CFOMar 19, 2026AWARD176,667$0.45$79.5KForm 4
Giraudo BryanCOO/CFOMar 19, 2026AWARD100,000$0.45$45.0KForm 4
Giraudo BryanCOO/CFOMar 19, 2026AWARD96,667$0.45$43.5KForm 4
Giraudo BryanCOO/CFOMar 19, 2026AWARD60,000$0.45$27.0KForm 4
Giraudo BryanCOO/CFOMar 19, 2026AWARD47,667$0.45$21.5KForm 4
Giraudo BryanCOO/CFOMar 19, 2026DISPOSED693,750$2.88$2.0MForm 4
Giraudo BryanCOO/CFOMar 19, 2026DISPOSED638,000$1.13$720.9KForm 4
Giraudo BryanCOO/CFOMar 19, 2026DISPOSED543,750$0.97$527.4KForm 4
Giraudo BryanCOO/CFOMar 19, 2026DISPOSED181,250$0.84$151.9KForm 4
Giraudo BryanCOO/CFOMar 19, 2026DISPOSED211,500$1.21$255.9KForm 4
Giraudo BryanCOO/CFOMar 19, 2026DISPOSED211,500$2.16$456.8KForm 4
Giraudo BryanCOO/CFOMar 19, 2026DISPOSED96,667$1.36$131.5KForm 4
Christian WaageEVP, Tech Ops and AdminMar 19, 2026AWARD506,250$0.45$227.8KForm 4
Christian WaageEVP, Tech Ops and AdminMar 19, 2026AWARD440,000$0.45$198.0KForm 4
Christian WaageEVP, Tech Ops and AdminMar 19, 2026AWARD375,000$0.45$168.8KForm 4