{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-237666","form_type":"8-K","ticker":null,"cik":"0001825367","company_name":"RayzeBio, Inc.","filed_at":"2023-09-19T23:59:59+00:00","discovered_at":"2026-05-14T18:03:35.509961+00:00","generated_at":"2026-06-10T13:46:02.266228+00:00","sec_items":["5.03","8.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.8,"calibrated_materiality_score":0.8,"confidence":"high","headline":"RayzeBio closes upsized IPO of 19.87M shares at $18.00, raising ~$336.7M gross proceeds","bullets":["Closed IPO of 19,869,240 shares at $18.00 per share, including full exercise of underwriters' option for 2,591,640 additional shares.","Gross proceeds to RayzeBio of approximately $336.7 million before underwriting discounts and expenses.","Selling stockholder sold 1,163,000 shares; RayzeBio received no proceeds from those sales.","Shares began trading on Nasdaq Global Market on September 15, 2023 under ticker RYZB.","Joint book-running managers: J.P. Morgan, Jefferies, Evercore ISI, Truist Securities."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-237666","json":"https://secwatch.observer/filing/0001193125-23-237666.json","markdown":"https://secwatch.observer/filing/0001193125-23-237666.md","text":"https://secwatch.observer/filing/0001193125-23-237666.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1825367/000119312523237666/0001193125-23-237666-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1825367/000119312523237666/d474188d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-10T13:46:02.266228+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":"f2e6aac06dd10c6c8fbe61bf3439518d10a31197","claim":"RayzeBio, Inc.: Amended and restated certificate of incorporation filed in connection with closing of IPO (effective 2023-09-19).","evidence_excerpt":"the Company filed an amended and restated certificate of incorporation (the “Restated Certificate”) with the Secretary of State of the State of Delaware.","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1825367/000119312523237666/0001193125-23-237666-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"charter amendment"},{"label":"Effective","value":"2023-09-19"}],"fact_type":"governance_change"},{"claim_id":"f73cdeea96978642fbaf20da646dfbb66000120c","claim":"RayzeBio, Inc.: Amended and restated bylaws adopted in connection with closing of IPO (effective 2023-09-19).","evidence_excerpt":"the Company adopted amended and restated bylaws (the “Restated Bylaws”) in connection with the closing of the IPO.","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1825367/000119312523237666/0001193125-23-237666-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"bylaw amendment"},{"label":"Effective","value":"2023-09-19"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}