{"schema_version":"secwatch.filing_event.v1","accession":"0001293971-24-000090","form_type":"8-K","ticker":null,"cik":"0001293971","company_name":"bluebird bio, Inc.","filed_at":"2024-12-13T23:59:59+00:00","discovered_at":"2026-05-14T18:03:08.000119+00:00","generated_at":"2026-05-29T03:21:02.333499+00:00","sec_items":["5.03","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"bluebird bio effects 1-for-20 reverse stock split; shares trade split-adjusted Dec 13","bullets":["Effective Dec 12, 2024 at 5:00 p.m. ET; new CUSIP 09609G 209.","Every 20 pre-split shares convert to 1 share; no fractional shares issued.","Authorized shares and par value unchanged; trading symbol remains BLUE.","Split approved by stockholders Dec 4, 2024; board chose 1-for-20 ratio."],"urls":{"canonical":"https://secwatch.observer/filing/0001293971-24-000090","json":"https://secwatch.observer/filing/0001293971-24-000090.json","markdown":"https://secwatch.observer/filing/0001293971-24-000090.md","text":"https://secwatch.observer/filing/0001293971-24-000090.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1293971/000129397124000090/0001293971-24-000090-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1293971/000129397124000090/blue-20241212.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-29T03:21:02.333499+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":"f8021f8e0840ce9b50500ce2e6e1928010880ecd","claim":"bluebird bio, Inc.: Effected a 1-for-20 reverse stock split of common stock via a Certificate of Amendment to the Amended and Restated Certificate of Incorporation (effective 2024-12-12).","evidence_excerpt":"On December 12, 2024, bluebird bio, Inc. (the \"Company\") filed a Certificate of Amendment to its Amended and Restated Certificate of Incorporation, as amended (the \"Charter Amendment\") with the Secretary of State of the State of Delaware to effect a 1-for-20 reverse stock split (the \"Reverse Stock Split\") of the Company's common stock, par value $0.01 per share (the \"Common Stock\"), effective December 12, 2024 at 5:00 p.m., Eastern Time (the \"Effective Time\")","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1293971/000129397124000090/0001293971-24-000090-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"charter amendment"},{"label":"Effective","value":"2024-12-12"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}