0001628280-26-063593.txt : 20260925 0001628280-26-063593.hdr.sgml : 20260925 20260925163605 ACCESSION NUMBER: 0001628280-26-063593 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260923 FILED AS OF DATE: 20260925 DATE AS OF CHANGE: 20260925 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Nathan Steven D CENTRAL INDEX KEY: 0002015114 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38796 FILM NUMBER: 261410864 MAIL ADDRESS: STREET 1: C/O GOSSAMER BIO, INC. STREET 2: 3013 SCIENCE PARK ROAD CITY: SAN DIEGO STATE: CA ZIP: 92121 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Gossamer Bio, Inc. CENTRAL INDEX KEY: 0001728117 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences EIN: 475461709 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 3115 MERRYFIELD ROW STREET 2: SUITE 120 CITY: SAN DIEGO STATE: CA ZIP: 92121 BUSINESS PHONE: (858) 684-1300 MAIL ADDRESS: STREET 1: 3115 MERRYFIELD ROW STREET 2: SUITE 120 CITY: SAN DIEGO STATE: CA ZIP: 92121 4 1 wk-form4_1790368562.xml FORM 4 X0609 4 2026-09-23 0 0001728117 Gossamer Bio, Inc. GOSS 0002015114 Nathan Steven D false 3115 MERRYFIELD ROW, SUITE 120 SAN DIEGO CA 92121 1 0 0 0 0 Stock Option (Right to Buy) 10.99 2026-09-23 4 A 0 10000 0 A 2036-09-22 Common Stock 10000 10000 D The entire number of shares subject to this option becomes fully vested and exercisable on the first anniversary of the grant date, subject to the Reporting Person's continued service on the board of directors of the Issuer through such vesting date. /s/ Christian Waage, Attorney-in-Fact 2026-09-25