{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-26-107960","form_type":"8-K","ticker":"SAFT","cik":"0001172052","company_name":"SAFETY INSURANCE GROUP INC","filed_at":"2026-09-15T20:49:40+00:00","discovered_at":"2026-09-15T20:51:08.455899+00:00","generated_at":"2026-09-15T20:51:17.800693+00:00","sec_items":["8.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Safety Insurance HSR waiting period expires; MAPFRE merger on track","bullets":["HSR waiting period for Safety-MAPFRE merger expired 11:59 p.m. ET on September 14, 2026, satisfying one closing condition.","Closing still requires other regulatory approvals, including from the Massachusetts Commissioner of Insurance.","Definitive proxy statement for the merger was mailed to Safety stockholders on September 14, 2026.","Merger Sub will merge into Safety, which survives as a wholly owned MAPFRE U.S.A. Corp. subsidiary."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-26-107960","json":"https://secwatch.observer/filing/0001104659-26-107960.json","markdown":"https://secwatch.observer/filing/0001104659-26-107960.md","text":"https://secwatch.observer/filing/0001104659-26-107960.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1172052/000110465926107960/0001104659-26-107960-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1172052/000110465926107960/tm2625481d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-09-15T20:51:17.800693+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"}