---
schema_version: "secwatch.filing_event.v1"
accession: "0001510295-22-000028"
form_type: "8-K"
ticker: "MPC"
cik: "0001510295"
company_name: "Marathon Petroleum Corp"
filed_at: "2022-04-21T23:59:59+00:00"
generated_at: "2026-06-26T05:42:20.768520+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# MPC CEO Michael Hennigan diagnosed with throat cancer, expects to continue as CEO during treatment

## Summary
- Michael J. Hennigan discovered a tumor in his throat via a health exam; cancer is limited to throat and nearby lymph nodes.
- Prognosis is encouraging; cancer caught early and described as curable with a treatment protocol of radiation and chemotherapy over seven weeks.
- Hennigan will remain actively involved in running the company as CEO; expects to limit travel and may limit speaking at times.
- Board of Directors has been fully apprised and is supportive.
- No change in leadership or operations announced; company emphasizes business outlook remains bright.

## SEC filing metadata
- accession: 0001510295-22-000028
- form_type: 8-K
- ticker: MPC
- cik: 0001510295
- company_name: Marathon Petroleum Corp
- filed_at: 2022-04-21T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1510295/000151029522000028/0001510295-22-000028-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1510295/000151029522000028/mpc-20220421.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001510295-22-000028
- JSON: https://secwatch.observer/filing/0001510295-22-000028.json
- Plain text: https://secwatch.observer/filing/0001510295-22-000028.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.