---
schema_version: "secwatch.filing_event.v1"
accession: "0001510295-23-000045"
form_type: "8-K"
ticker: "MPC"
cik: "0001510295"
company_name: "Marathon Petroleum Corp"
filed_at: "2023-05-02T23:59:59+00:00"
generated_at: "2026-06-16T03:21:10.542022+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# MPC Q1 2023 net income $2.7B ($6.09 EPS) vs $845M YoY; adj. EBITDA $5.2B; adds $5B buyback auth.

## Summary
- Net income $2.7B ($6.09 diluted EPS) vs $845M ($1.49) YoY; adjusted EBITDA $5.2B vs $2.6B.
- Returned $3.5B to shareholders: $3.2B buybacks and $337M dividends; additional $5B buyback authorization approved, total $9B available.
- Refining & Marketing segment adjusted EBITDA $3.85B ($15.09/barrel) vs $1.37B ($5.39/bbl); crude utilization 89%, throughput 2.8M bpd.
- Martinez Renewables Phase I at full capacity (260M gal/yr); Phase II on track; Galveston Bay STAR project started, adding 40k bpd crude capacity.
- Q2 2023 outlook: throughput ~2.86M bpd, operating costs $5.20/bbl, turnaround costs $400M.

## SEC filing metadata
- accession: 0001510295-23-000045
- form_type: 8-K
- ticker: MPC
- cik: 0001510295
- company_name: Marathon Petroleum Corp
- filed_at: 2023-05-02T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1510295/000151029523000045/0001510295-23-000045-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1510295/000151029523000045/mpc-20230502.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001510295-23-000045
- JSON: https://secwatch.observer/filing/0001510295-23-000045.json
- Plain text: https://secwatch.observer/filing/0001510295-23-000045.txt

## Key facts
- Earnings Releases
  Marathon Petroleum Corp reported the first quarter of 2023 results: net income net income attributable to MPC of $2.7 billion, EPS $6.09 per diluted share.
  - Period: the first quarter of 2023
  - Net income: net income attributable to MPC of $2.7 billion
  - EPS: $6.09 per diluted share
  - Result: reported results
  source text: Marathon Petroleum Corp. (NYSE: MPC) today reported net income attributable to MPC of $2.7 billion, or $6.09 per diluted share, for the first quarter of 2023
  evidence_url: https://www.sec.gov/Archives/edgar/data/1510295/000151029523000045/0001510295-23-000045-index.htm

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