{"schema_version":"secwatch.filing_event.v1","accession":"0001564590-22-011912","form_type":"8-K","ticker":"THG","cik":"0000944695","company_name":"HANOVER INSURANCE GROUP, INC.","filed_at":"2022-03-28T23:59:59+00:00","discovered_at":"2026-05-14T18:04:10.486026+00:00","generated_at":"2026-06-26T16:57:34.766368+00:00","sec_items":["7.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"Hanover to split Commercial Lines into Core Commercial & Specialty; historic data refiled 2019-2021","bullets":["Disaggregates former Commercial Lines into Core Commercial and Specialty segments including expenses and NII.","Expands top-line reporting: will provide net premiums written, renewal price change, retention by sub-segment.","Will no longer report supplemental loss ratio by product line for Core Commercial segment.","Personal Lines: homeowners sub-segment combined with other personal lines (umbrella).","First quarter 2022 results expected after market close May 3; webcast May 4."],"urls":{"canonical":"https://secwatch.observer/filing/0001564590-22-011912","json":"https://secwatch.observer/filing/0001564590-22-011912.json","markdown":"https://secwatch.observer/filing/0001564590-22-011912.md","text":"https://secwatch.observer/filing/0001564590-22-011912.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/944695/000156459022011912/0001564590-22-011912-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/944695/000156459022011912/thg-8k_20220328.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-26T16:57:34.766368+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"}