Marathon Petroleum sustainability score: 17/100
Below expectations starts at 31. The highest score on SINK is 71.
Marathon Petroleum is a U.S. oil refiner and midstream operator headquartered in Findlay, Ohio. It was incorporated in 2009 in a restructuring of Marathon Oil and operates refineries, renewable diesel facilities and the MPLX midstream partnership.
More about Marathon Petroleum
It had about 18,500 employees and $132.7 billion in FY2025 revenue.
Founded 2009Head office Findlay, Ohio, United StatesStaff ~18,500 (FY2025)Revenue $132,699M revenue (FY2025)Website ↗
Marathon Petroleum's Scope 1 and Scope 3 emissions are rising (Scope 1 34.6 Mt and use-of-products Scope 3 405 Mt in 2024) while it moves from absolute to intensity targets. Operationally disclosed and third-party verified, but the trajectory is worsening. Pattern of environmental enforcement, trade-group climate obstruction, and abandoned absolute emissions reduction targets define the weakness.
Marathon Petroleum scores 17/100 (Significant gaps) on SINK's independent climate assessment, scored from public data only. Scores are free. Nobody can pay to change a score, speed it up or hide it. Last verified October 2026.
That places Marathon Petroleum joint 1004th of 1,023 companies scored, and joint 13th of 18 in Oil & Gas.
What is Marathon Petroleum doing well, and where does it fall short?
Strongest on Carbon Footprint: Operations and Transparency & Accountability (7/10, 7/10). Weakest on Emissions Trajectory and Controversies & Red Flags (0/10, 1/10).
Where Marathon Petroleum lost points
For each question that lost points, the evidence our public rubric looks for that we didn't find.
What would raise this score
- Whether its emissions are fallingShow its emissions are falling.
- Its record on controversiesDeal with the findings under question 10, in public.
- How clean its energy isMove to a renewable energy tariff or make a major efficiency investment.
Every question that lost points
- Emissions from its own operations7/10Its own emissions aren't independently verified or tracked over several years.
- Emissions from its supply chain4/10Most of its supply-chain (Scope 3) emissions aren't measured.
- Whether its emissions are falling0/10No evidence its emissions are falling.
- How clean its energy is2/10No renewable energy tariff or major efficiency investment shown.
- Its effect on nature4/10Its effect on nature isn't measured or independently verified.
- How it uses materials and handles waste3/10No active waste reduction, reuse or repair shown.
- Its effect on water3/10No monitoring of water use, or no measures to reduce it.
- Its climate targets2/10No specific targets with dates.
- How openly it reports7/10No mission-locked structure, such as B Corp certification.
- Its record on controversies1/10Points deducted for controversies or its business model. The finding is under question 10.
A score changes when the evidence does. We use new published evidence at the next rescore. Anyone can send us new evidence, free. How to send it.
How is Marathon Petroleum's SINK score calculated?
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × ScaleWhat evidence is Marathon Petroleum's score based on?
10 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
20% of them were published by Marathon Petroleum itself; the rest come from independent sources.
“Total Scope 1 GHG Emissions(7)(8) million tonnes CO₂e - 305-1-a CCE-4 - C1 32.2 33.0 33.7 33.0 34.6”
“We have existing targets for reducing Scope 1 & 2 GHG emissions intensity, for lowering methane emissions intensity and for lowering our freshwater withdrawal intensity.”
“Marathon Petroleum's scope 3 intensity has not decreased since 2019.”
“Eleventh consecutive year of lowering GHG emissions intensity (cumulative 30% reduction since 2014)”
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How does Marathon Petroleum compare with other oil & gas companies?
Where Marathon Petroleum sits among oil & gas peers.
Among the 18 major oil & gas brands we've scored, Marathon Petroleum is tied =13th of 18, with 2 others.
Who scores higher in Oil & Gas?
The 3 companies in the sector scoring nearest above Marathon Petroleum.
Exxon Mobil operates with minimal climate accountability.
See the breakdown →Equinor is a fossil fuel operator claiming energy transition while expanding oil and gas production 10%+ by 2027.
See the breakdown →TotalEnergies reports granular emissions data but plans 3% annual oil and gas production growth through 2030, negating absolute emission reductions.
See the breakdown →Which companies moved this week, and why.
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