{"filing":{"accession_number":"0001728117-26-000079","cik":"0001728117","ticker":"GOSS","company_name":"Gossamer Bio, Inc.","form":"8-K","filing_date":"2026-08-26","report_date":"2026-08-24","primary_document":"goss-20260824.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1728117/000172811726000079/goss-20260824.htm"},"events":[{"id":29717,"run_id":27225,"accession_number":"0001728117-26-000079","anchor_item_number":"5.03","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.85,"summary":"The filing discloses amendment of the certificate of incorporation to establish Series A-1 Convertible Preferred Stock in connection with closing of a private placement. While technically an Item 5.03 (bylaw/charter amendment), the material substance is the issuance of convertible preferred securities in a private placement, which is a dilutive capital raise. The reference to Item 1.01 of the prior 8-K (which typically covers material acquisitions and other transactions) and the explicit mention of \"closing of its previously announced private placement\" indicate this is a financing event, not a routine governance matter.","company_name":"Gossamer Bio, Inc.","ticker":"GOSS","filing_date":"2026-08-26","form":"8-K","submitted_at":null,"items":[{"id":32094,"accession_number":"0001728117-26-000079","item_number":"5.03","item_title":"Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.85,"reasoning":"The filing discloses amendment of the certificate of incorporation to establish Series A-1 Convertible Preferred Stock in connection with closing of a private placement. While technically an Item 5.03 (bylaw/charter amendment), the material substance is the issuance of convertible preferred securities in a private placement, which is a dilutive capital raise. The reference to Item 1.01 of the prior 8-K (which typically covers material acquisitions and other transactions) and the explicit mention of \"closing of its previously announced private placement\" indicate this is a financing event, not a routine governance matter.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-26T20:02:56.957926+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":32094,"accession_number":"0001728117-26-000079","item_number":"5.03","item_title":"Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.","event_type":"dilutive_issuance","event_domain":"financial","is_material":true,"confidence":0.85,"reasoning":"The filing discloses amendment of the certificate of incorporation to establish Series A-1 Convertible Preferred Stock in connection with closing of a private placement. While technically an Item 5.03 (bylaw/charter amendment), the material substance is the issuance of convertible preferred securities in a private placement, which is a dilutive capital raise. The reference to Item 1.01 of the prior 8-K (which typically covers material acquisitions and other transactions) and the explicit mention of \"closing of its previously announced private placement\" indicate this is a financing event, not a routine governance matter.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-26T20:02:56.957926+00:00","company_name":"Gossamer Bio, Inc.","ticker":"GOSS","filing_date":"2026-08-26"}]}