{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-23-068804","form_type":"8-K","ticker":"THG","cik":"0000944695","company_name":"HANOVER INSURANCE GROUP, INC.","filed_at":"2023-12-07T23:59:59+00:00","discovered_at":"2026-05-14T18:03:32.474073+00:00","generated_at":"2026-06-07T16:41:59.057659+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Hanover Insurance Group Controller Warren Barnes announces retirement effective April 1, 2025","bullets":["Warren E. Barnes, SVP, Corporate Controller and Principal Accounting Officer, intends to retire on April 1, 2025.","Mr. Barnes communicated his intention on December 5, 2023; has been with the company since 1993.","No replacement named; Barnes has served as Principal Accounting Officer since 2015 and Controller since 1997."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-23-068804","json":"https://secwatch.observer/filing/0000950170-23-068804.json","markdown":"https://secwatch.observer/filing/0000950170-23-068804.md","text":"https://secwatch.observer/filing/0000950170-23-068804.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/944695/000095017023068804/0000950170-23-068804-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/944695/000095017023068804/thg-20231205.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T16:41:59.057659+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":"32214d54f3","claim":"Warren E. Barnes departed as Senior Vice President, Corporate Controller and Principal Accounting Officer at HANOVER INSURANCE GROUP, INC..","evidence_excerpt":"On December 5, 2023, Warren E. Barnes, the Senior Vice President, Corporate Controller and Principal Accounting Officer of The Hanover Insurance Group, Inc. (the “Company”), communicated to the Company his intention to retire from the Company, currently expected to be effective April 1, 2025.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/944695/000095017023068804/0000950170-23-068804-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retire"},{"label":"Role","value":"Senior Vice President, Corporate Controller and Principal Accounting Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}