{"schema_version":"secwatch.filing_event.v1","accession":"0001728117-26-000079","form_type":"8-K","ticker":"GOSS","cik":"0001728117","company_name":"Gossamer Bio, Inc.","filed_at":"2026-08-26T20:01:53+00:00","discovered_at":"2026-08-26T20:03:11.477192+00:00","generated_at":"2026-08-26T20:03:56.208766+00:00","sec_items":["5.03","1.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"medium","headline":"Gossamer Bio closes private placement, files Series A-1 preferred stock designation","bullets":["On Aug 24, 2026, Gossamer Bio filed a Certificate of Designation for Series A-1 Convertible Preferred Stock with Delaware.","Filing made in connection with closing of previously announced private placement; terms incorporated by reference from Aug 21, 2026 8-K.","Certificate of Designation filed as Exhibit 3.1; no new financial details disclosed in this filing.","Company amended its amended and restated certificate of incorporation to effect the designation."],"urls":{"canonical":"https://secwatch.observer/filing/0001728117-26-000079","json":"https://secwatch.observer/filing/0001728117-26-000079.json","markdown":"https://secwatch.observer/filing/0001728117-26-000079.md","text":"https://secwatch.observer/filing/0001728117-26-000079.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1728117/000172811726000079/0001728117-26-000079-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1728117/000172811726000079/goss-20260824.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-08-26T20:03:56.208766+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}