# clm_936E9049020E

subject: Marathon Petroleum (/record/marathon-petroleum.md)  
predicate: chair  
value: Maryann T. Mannen  
valid_from: 2026-01-01  
valid_to: null  
published: 2025-11-04  
recorded: 2026-11-08  
confidence: 0.95  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-13  
cite: AsOf. "Marathon Petroleum chair: Maryann T. Mannen", as of 2026-01-01. Claim clm_936E9049020E, https://asof.is/claim/clm_936E9049020E, accessed 2026-11-13. Source: https://www.sec.gov/Archives/edgar/data/1510295/000151029526000023/mpc-20260316.htm.  
checked: 2026-11-13 · its source page states the value and the date, as read by an AI model  

> elected Maryann T. Mannen, President and Chief Executive Officer and member of the Board, as Chairman of the Board, effective as of January 1, 2026 (the “Effective Date”).

What https://www.sec.gov/Archives/edgar/data/1510295/000151029525000065/0001510295-25-000065-index.htm says, word for word.

## Sources

- https://www.sec.gov/Archives/edgar/data/1510295/000151029526000023/mpc-20260316.htm (primary, SEC EDGAR DEF 14A, published 2026-03-16)
- https://www.sec.gov/Archives/edgar/data/1510295/000151029525000065/0001510295-25-000065-index.htm (primary, SEC EDGAR 8-K Item 5.02, published 2025-11-04)

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