{"schema_version":"secwatch.filing_event.v1","accession":"0001510295-24-000052","form_type":"8-K","ticker":"MPC","cik":"0001510295","company_name":"Marathon Petroleum Corp","filed_at":"2024-05-13T23:59:59+00:00","discovered_at":"2026-05-14T18:03:18.748753+00:00","generated_at":"2026-06-02T02:14:49.487268+00:00","sec_items":["5.02","8.01","9.01"],"event_type":"leadership","sentiment":"positive","materiality_score":0.9,"calibrated_materiality_score":0.9,"confidence":"high","headline":"Marathon Petroleum appoints Maryann Mannen as CEO, effective Aug 1, 2024","bullets":["Maryann Mannen, current President, becomes CEO and joins the Board on August 1, 2024, succeeding Michael Hennigan.","Michael Hennigan transitions from CEO to Executive Chairman; Board waives mandatory retirement policy for him.","John Surma elected Lead Director; Board expands to 14 members with Mannen's election to the Board.","Mannen's 2024 target LTI award is $5,000,000 with base salary $1,050,000; Hennigan's target LTI was $14,800,000."],"urls":{"canonical":"https://secwatch.observer/filing/0001510295-24-000052","json":"https://secwatch.observer/filing/0001510295-24-000052.json","markdown":"https://secwatch.observer/filing/0001510295-24-000052.md","text":"https://secwatch.observer/filing/0001510295-24-000052.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1510295/000151029524000052/0001510295-24-000052-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1510295/000151029524000052/mpc-20240511.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-02T02:14:49.487268+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":"5ae426a9a2","claim":"John P. Surma was elected as Lead Director at Marathon Petroleum Corp.","evidence_excerpt":"current Chairman of the Board John P. Surma has been elected Lead Director.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1510295/000151029524000052/0001510295-24-000052-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"elected"},{"label":"Role","value":"Lead Director"}],"fact_type":"executive_change"},{"claim_id":"644e93c2e4","claim":"Maryann T. Mannen was appointed as President and Chief Executive Officer of MPLX at Marathon Petroleum Corp.","evidence_excerpt":"effective August 1, 2024, has been appointed as the President and Chief Executive Officer of MPLX.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1510295/000151029524000052/0001510295-24-000052-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"President and Chief Executive Officer of MPLX"}],"fact_type":"executive_change"},{"claim_id":"65dfe0efd6","claim":"Maryann T. Mannen was elected as Director at Marathon Petroleum Corp.","evidence_excerpt":"the Board increased the size of the Board to fourteen members and elected Ms. Mannen as a director of the Company, with such increase and election effective August 1, 2024.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1510295/000151029524000052/0001510295-24-000052-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"elected"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"b88705595a","claim":"Maryann T. Mannen was appointed as Chief Executive Officer at Marathon Petroleum Corp.","evidence_excerpt":"On May 11, 2024, the board of directors (the “Board”) of Marathon Petroleum Corporation (the “Company”) appointed Maryann T. Mannen as Chief Executive Officer of the Company, effective August 1, 2024.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1510295/000151029524000052/0001510295-24-000052-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chief Executive Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}