{"filing":{"accession_number":"0001728117-26-000094","cik":"0001728117","ticker":"GOSS","company_name":"Gossamer Bio, Inc.","form":"8-K","filing_date":"2026-09-11","report_date":"2026-09-10","primary_document":"goss-20260910.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1728117/000172811726000094/goss-20260910.htm"},"events":[{"id":32828,"run_id":30180,"accession_number":"0001728117-26-000094","anchor_item_number":"5.03","event_type":"delisting_risk","event_domain":"terminal","is_material":true,"confidence":0.82,"summary":"Gossamer Bio implemented a 1-for-80 reverse stock split effective September 10, 2026, to regain compliance with Nasdaq's $1.00 minimum bid price requirement by October 5, 2026. The company disclosed substantial doubt about achieving compliance and warned that there is no assurance the common stock will remain listed on the Nasdaq Global Select Market.","company_name":"Gossamer Bio, Inc.","ticker":"GOSS","filing_date":"2026-09-11","form":"8-K","submitted_at":null,"items":[{"id":36096,"accession_number":"0001728117-26-000094","item_number":"3.03","item_title":"Material Modification to Rights of Security Holders.","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"The filing discloses a 1-for-80 reverse stock split that became effective on September 10, 2026, implemented via a Certificate of Amendment to the company's Certificate of Incorporation. While this is a capital structure modification affecting security holders' rights (Item 3.03), it is fundamentally a governance action—an amendment to the certificate of incorporation—rather than a specific financial, operational, or legal event type. The reverse split is material because it affects all shareholders' holdings and is undertaken to address delisting risk (the company must regain Nasdaq compliance with a $1.00 minimum bid price by October 5, 2026), making it significant to investor assessment of the registrant's status.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-11T12:03:57.283152+00:00","company_name":"","ticker":null,"filing_date":""},{"id":36097,"accession_number":"0001728117-26-000094","item_number":"5.03","item_title":"Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.","event_type":"delisting_risk","event_domain":"terminal","is_material":true,"confidence":0.75,"reasoning":"The filing discloses a 1-for-80 reverse stock split undertaken specifically to \"help the Company regain compliance with the minimum bid price requirement for continued listing on the Nasdaq Global Select Market,\" with an explicit warning that \"there can be no assurance that the Company will regain compliance with the minimum bid price requirement...or that the Common Stock will remain listed on the Nasdaq Global Select Market.\" This disclosure of delisting risk and the remedial action taken is material to investors assessing the registrant's continued exchange listing status.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-11T12:03:57.283152+00:00","company_name":"","ticker":null,"filing_date":""},{"id":36098,"accession_number":"0001728117-26-000094","item_number":"8.01","item_title":"Other Events.","event_type":"delisting_risk","event_domain":"terminal","is_material":true,"confidence":0.85,"reasoning":"Gossamer Bio announced effectiveness of a 1-for-80 reverse stock split explicitly undertaken to \"help the Company regain compliance with the minimum bid price requirement for continued listing on the Nasdaq Global Select Market.\" The filing discloses that the stock must reach at least $1.00 per share for 10 consecutive business days by October 5, 2026, and expressly states \"There can be no assurance that the Company will regain compliance with the minimum bid price requirement...or that its common stock will remain listed on the Nasdaq Global Select Market.\" This is a material delisting risk disclosure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-11T12:03:57.283152+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":36096,"accession_number":"0001728117-26-000094","item_number":"3.03","item_title":"Material Modification to Rights of Security Holders.","event_type":"governance_other","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"The filing discloses a 1-for-80 reverse stock split that became effective on September 10, 2026, implemented via a Certificate of Amendment to the company's Certificate of Incorporation. While this is a capital structure modification affecting security holders' rights (Item 3.03), it is fundamentally a governance action—an amendment to the certificate of incorporation—rather than a specific financial, operational, or legal event type. The reverse split is material because it affects all shareholders' holdings and is undertaken to address delisting risk (the company must regain Nasdaq compliance with a $1.00 minimum bid price by October 5, 2026), making it significant to investor assessment of the registrant's status.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-11T12:03:57.283152+00:00","company_name":"Gossamer Bio, Inc.","ticker":"GOSS","filing_date":"2026-09-11"},{"id":36097,"accession_number":"0001728117-26-000094","item_number":"5.03","item_title":"Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.","event_type":"delisting_risk","event_domain":"terminal","is_material":true,"confidence":0.75,"reasoning":"The filing discloses a 1-for-80 reverse stock split undertaken specifically to \"help the Company regain compliance with the minimum bid price requirement for continued listing on the Nasdaq Global Select Market,\" with an explicit warning that \"there can be no assurance that the Company will regain compliance with the minimum bid price requirement...or that the Common Stock will remain listed on the Nasdaq Global Select Market.\" This disclosure of delisting risk and the remedial action taken is material to investors assessing the registrant's continued exchange listing status.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-11T12:03:57.283152+00:00","company_name":"Gossamer Bio, Inc.","ticker":"GOSS","filing_date":"2026-09-11"},{"id":36098,"accession_number":"0001728117-26-000094","item_number":"8.01","item_title":"Other Events.","event_type":"delisting_risk","event_domain":"terminal","is_material":true,"confidence":0.85,"reasoning":"Gossamer Bio announced effectiveness of a 1-for-80 reverse stock split explicitly undertaken to \"help the Company regain compliance with the minimum bid price requirement for continued listing on the Nasdaq Global Select Market.\" The filing discloses that the stock must reach at least $1.00 per share for 10 consecutive business days by October 5, 2026, and expressly states \"There can be no assurance that the Company will regain compliance with the minimum bid price requirement...or that its common stock will remain listed on the Nasdaq Global Select Market.\" This is a material delisting risk disclosure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-11T12:03:57.283152+00:00","company_name":"Gossamer Bio, Inc.","ticker":"GOSS","filing_date":"2026-09-11"}]}