{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-24-040345","form_type":"8-K","ticker":"STRO","cik":"0001382101","company_name":"SUTRO BIOPHARMA, INC.","filed_at":"2024-04-02T23:59:59+00:00","discovered_at":"2026-05-14T18:03:18.174200+00:00","generated_at":"2026-06-04T03:25:25.821372+00:00","sec_items":["1.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Sutro Biopharma launches $75M common stock offering at $5.18/share","bullets":["14,478,764 shares offered at $5.18/share; gross proceeds ~$75M.","Underwriting agreement with BofA Securities; closing expected April 4, 2024.","Net proceeds for general corporate purposes including R&D and working capital.","Offering is dilutive to existing shareholders; trading symbol STRO on Nasdaq."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-24-040345","json":"https://secwatch.observer/filing/0000950170-24-040345.json","markdown":"https://secwatch.observer/filing/0000950170-24-040345.md","text":"https://secwatch.observer/filing/0000950170-24-040345.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1382101/000095017024040345/0000950170-24-040345-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1382101/000095017024040345/stro-20240402.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-04T03:25:25.821372+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":[{"claim_id":"6a286aa3598854d98d48296f0ae23dfba09a1f1e","claim":"SUTRO BIOPHARMA, INC. entered into Underwriting Agreement with BofA Securities, Inc. (effective 2024-04-02).","evidence_excerpt":"On April 2, 2024, Sutro Biopharma, Inc. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with BofA Securities, Inc., as representative of the several underwriters named therein (the “Underwriter”), pursuant to which the Company agreed to issue and sell 14,478,764 shares of its common stock (the “Shares”) to the Underwriter (the “Offering”).","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1382101/000095017024040345/0000950170-24-040345-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"underwriting"},{"label":"Counterparty","value":"BofA Securities, Inc."},{"label":"Effective","value":"2024-04-02"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}