{"schema_version":"secwatch.filing_event.v1","accession":"0001096343-22-000146","form_type":"8-K","ticker":"MKL","cik":"0001096343","company_name":"MARKEL GROUP INC.","filed_at":"2022-11-18T23:59:59+00:00","discovered_at":"2026-05-14T18:03:49.595822+00:00","generated_at":"2026-06-21T15:38:27.964227+00:00","sec_items":["5.02","5.03","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"Markel: Co-CEO Whitt to retire Dec 31, 2022; Gayner becomes sole CEO Jan 1, 2023","bullets":["Richard R. Whitt III retires as Co-CEO and from Board effective Dec 31, 2022.","Thomas S. Gayner becomes sole CEO on Jan 1, 2023; leads insurance, investments, Markel Ventures.","CFO Jeremy A. Noble becomes President, Insurance on Jan 1; searches for CFO successor underway.","Brian J. Costanzo named principal financial officer; received $100K award for new role.","Compensation changes: Gayner's target equity award up to 500% of salary; Heaton and Noble base salaries increased."],"urls":{"canonical":"https://secwatch.observer/filing/0001096343-22-000146","json":"https://secwatch.observer/filing/0001096343-22-000146.json","markdown":"https://secwatch.observer/filing/0001096343-22-000146.md","text":"https://secwatch.observer/filing/0001096343-22-000146.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1096343/000109634322000146/0001096343-22-000146-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1096343/000109634322000146/mkl-20221115.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-21T15:38:27.964227+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":"2fd3a5ac51","claim":"Thomas S. Gayner changed role as Sole Chief Executive Officer at MARKEL GROUP INC..","evidence_excerpt":"Thomas S. Gayner, Co-Chief Executive Officer, will become sole Chief Executive Officer on January 1, 2023, upon Mr. Whitt's retirement.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1096343/000109634322000146/0001096343-22-000146-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"promoted"},{"label":"Role","value":"Sole Chief Executive Officer"}],"fact_type":"executive_change"},{"claim_id":"85f2dc88f2","claim":"Robert C. Cox departed as President and Chief Operating Officer, Insurance Operations at MARKEL GROUP INC..","evidence_excerpt":"Robert C. Cox, the Company's President and Chief Operating Officer, Insurance Operations, will (i) become President and Chief Operating Officer, Global Insurance for the Company's insurance engine, reporting to Mr. Noble, and (ii) cease to be an executive officer of the Company.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1096343/000109634322000146/0001096343-22-000146-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"ceased to be an executive officer"},{"label":"Role","value":"President and Chief Operating Officer, Insurance Operations"}],"fact_type":"executive_change"},{"claim_id":"bb42f4ade2","claim":"Brian J. Costanzo was appointed as Principal Financial Officer at MARKEL GROUP INC..","evidence_excerpt":"the functions, duties and responsibilities of the Company's principal financial officer (as set forth by rules adopted under the Exchange Act), including relating to the Company’s periodic reporting on Form 10-Q and Form 10-K and the fulfillment of such functions, duties and responsibilities associated with the accompanying certifications to such filings, as well as the designation of the Company’s principal financial officer, will transition from Mr. Noble to Brian J. Costanzo, the Company’s Senior Vice President, Finance, Chief Accounting Officer and Controller.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1096343/000109634322000146/0001096343-22-000146-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Principal Financial Officer"}],"fact_type":"executive_change"},{"claim_id":"c9449e656c","claim":"Jeremy A. Noble changed role as President, Insurance at MARKEL GROUP INC..","evidence_excerpt":"effective January 1, 2023, Jeremy A. Noble, Senior Vice President and Chief Financial Officer, will become President, Insurance, of the Company.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1096343/000109634322000146/0001096343-22-000146-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"promoted"},{"label":"Role","value":"President, Insurance"}],"fact_type":"executive_change"},{"claim_id":"ffbbbb10a6","claim":"Richard R. Whitt III retired as Co-Chief Executive Officer at MARKEL GROUP INC..","evidence_excerpt":"Richard R. Whitt, III informed Markel Corporation (the Company) that effective 11:59:59 p.m. on December 31, 2022, he will be retiring and resigning (i) as a Co-Chief Executive Officer (Co-CEO) of the Company and (ii) as a member of the Company's Board of Directors (the Board).","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1096343/000109634322000146/0001096343-22-000146-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retired"},{"label":"Role","value":"Co-Chief Executive Officer"}],"fact_type":"executive_change"},{"claim_id":"08a6bcbfdb4c32111b8dd75537bb952a29c483e3","claim":"MARKEL GROUP INC.: Amended and restated Bylaws to incorporate advance notice requirements for shareholder nominations under SEC universal proxy rules, eliminate references to multiple CEOs, grant CEO additional authority over subordinate officers, and make technical changes (effective 2023-01-01).","evidence_excerpt":"On November 16, 2022, but effective January 1, 2023, the Board amended and restated the Company's Bylaws (as amended and restated, the Amended and Restated Bylaws) to, among other things: • incorporate additional requirements to the advance notice and other procedural requirements related to shareholder nominations for election of directors or proposals of business at meetings of shareholders, including additional information that a shareholder must include in a notice of a nomination and additional actions a shareholder must take (or refrain from taking) to comply with the SEC's universal proxy rules under Rule 14a-19 of the Exchange Act; • eliminate references contemplating multiple Chief Executive Officers; • give the Chief Executive Officer additional authority with respect to the appointment, removal and delegation of powers of subordinate officers; and • make other technical, conforming, modernizing or clarifying changes in certain other provisions.","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1096343/000109634322000146/0001096343-22-000146-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"bylaw amendment"},{"label":"Effective","value":"2023-01-01"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}