{"url_path":"/sec/goss/10-q/2026/item-6","section_key":"item-6","section_title":"Item 6 EXHIBITS","topic":"sec","document":{"doc_type":"10-Q","doc_date":"2026-05-15","source_url":"https://www.sec.gov/Archives/edgar/data/1728117/0001728117-26-000032-index.html","accession_number":"0001728117-26-000032","cik":"0001728117","ticker":"GOSS","issuer_name":"Gossamer Bio, Inc.","edgar_url":"https://www.sec.gov/Archives/edgar/data/1728117/0001728117-26-000032-index.html","primary_entity_key":"0001728117","primary_entity_name":"Gossamer Bio, Inc."},"word_count":387,"has_tables":true,"body_markdown":"ITEM 6. EXHIBITS\n\nThe exhibits filed or furnished as part of this Quarterly Report on Form 10-Q are set forth on the Exhibit Index, which Exhibit Index is incorporated herein by reference.\n\n37\n\n[Table of Contents](#i9a97deb1f63b46c3867089c2b6fc256c_7)\n\nEXHIBIT INDEX\n\nExhibit\nNumberExhibit DescriptionIncorporated by ReferenceFiled Herewith\n\nFormDateNumber\n\n3.1\n[Amended and Restated Certificate of Incorporation, as amended.](https://www.sec.gov/Archives/edgar/data/1728117/000172811723000108/goss-20230630xex31.htm)\n10-Q8/8/20233.1\n\n3.2\n[Amended and Restated Bylaws.](https://www.sec.gov/Archives/edgar/data/1728117/000156459020024690/goss-ex32_408.htm)\n10-Q5/12/20203.2\n\n4.1\n[Form of Common Stock Certificate.](https://www.sec.gov/Archives/edgar/data/1728117/000119312519014857/d690055dex41.htm)\nS-1/A1/23/20194.1\n\n4.2\n[Indenture, dated as of May 21, 2020, by and between the Company and Wilmington Trust, National Association.](https://www.sec.gov/Archives/edgar/data/1728117/000156459020026546/goss-ex41_10.htm)\n8-K5/21/20204.1\n\n4.3\n[First Supplemental Indenture, dated May 21, 2020, by and between the Company and Wilmington Trust, National Association.](https://www.sec.gov/Archives/edgar/data/1728117/000156459020026546/goss-ex42_11.htm)\n8-K5/21/20204.2\n\n4.4\n[Form of Global Note representing 5.00% Convertible Senior Notes due 2027 (included as part of Exhibit 4.4).](https://www.sec.gov/Archives/edgar/data/1728117/000156459020026546/goss-ex42_11.htm)\n8-K5/21/20204.3\n\n4.5\n[Form of Warrant](https://www.sec.gov/Archives/edgar/data/1728117/000172811723000094/goss-2023x07x19exx41.htm)\n8-K7/20/20234.1\n\n31.1\n[Certification of Chief Executive Officer of Gossamer Bio, Inc., as required by Rule 13a-14(a) or Rule 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](goss-20260331x10qxexx311.htm)\nX\n\n31.2\n[Certification of Chief Financial Officer of Gossamer Bio, Inc., as required by Rule 13a-14(a) or Rule 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](goss-20260331x10qxexx312.htm)\nX\n\n32.1*\n[Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.](goss-20260331x10qxexx321.htm)\nX\n\n32.2*\n[Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.](goss-20260331x10qxexx322.htm)\nX\n\n101.INSXBRL Report Instance DocumentX\n\n101.SCHXBRL Taxonomy Extension Schema DocumentX\n\n101.CALXBRL Taxonomy Calculation Linkbase DocumentX\n\n101.LABXBRL Taxonomy Label Linkbase DocumentX\n\n101.PREXBRL Presentation Linkbase DocumentX\n\n101.DEFXBRL Taxonomy Extension Definition Linkbase DocumentX\n\n104Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)X\n\n*This certification is deemed not filed for purpose of section 18 of the Exchange Act or otherwise subject to the liability of that section, nor shall it be deemed incorporated by reference into any filing under the Securities Act or the Exchange Act.\n\n#Indicates management contract or compensatory plan.\n\n38\n\nSIGNATURES\n\nPursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.\n\nGOSSAMER BIO, INC.\n\nDate:May 15, 2026By:/s/ Faheem Hasnain\n\nFaheem Hasnain\n\nPresident and Chief Executive Officer\n\n(Principal Executive Officer)\n\nDate:May 15, 2026By:/s/ Bryan Giraudo\n\nBryan Giraudo\n\nChief Financial Officer and Chief Operating Officer\n\n(Principal Financial and Accounting Officer)"}