Marathon Petroleum reported a sharp third-quarter earnings increase, powered by much stronger refining margins and full refinery utilisation. The company also lifted its dividend, added US$5 billion to its buyback authorisation and agreed to sell two refineries for US$4.2 billion.
- US$7.4 billion quarterly net income, up from US$1.4 billion
- US$11.7 billion adjusted EBITDA, led by refining
- 10% quarterly dividend increase and US$5 billion extra buyback capacity
- US$4.2 billion planned sale of St. Paul Park and Mandan refineries
- MPLX distribution raised 12.5% for the third consecutive year
Refining margins drive Marathon Petroleum earnings surge
Refining economics did the heavy lifting for Marathon Petroleum Corporation (NYSE:MPC) in the September quarter, sending net income attributable to MPC to US$7.4 billion from US$1.4 billion a year earlier. Diluted earnings reached US$26.59 a share, while adjusted net income, a non-GAAP measure, was US$7.5 billion, or US$26.93 a share, compared with US$915 million and US$3.01 a share respectively in the prior-year period.
The GAAP result is the anchor here: MPC reported US$7.878 billion in consolidated net income, including US$431 million attributable to non-controlling interests. Adjusted EBITDA, another non-GAAP measure, rose to US$11.7 billion from US$3.2 billion.
Refinery utilisation reaches 100% as crack spreads widen
Refining and Marketing generated US$9.9 billion of adjusted EBITDA, compared with US$1.8 billion in the third quarter of 2025. The segment’s adjusted EBITDA per barrel climbed to US$34.15 from US$6.37, while its reported margin increased to US$45.70 a barrel from US$17.60.
MPC processed 3.2 million barrels a day during the quarter at 100% crude capacity utilisation, versus 95% utilisation and 3.0 million barrels a day a year earlier. The company attributed the improved result primarily to higher market crack spreads across all regions. Refining planned turnaround costs still reached US$294 million, a reminder that the adjusted figure excludes a material operating cost.
Capital returns rise alongside refinery portfolio reshaping
MPC returned US$3.3 billion to shareholders during the quarter and raised its quarterly dividend by 10%. The board also approved an additional US$5 billion share repurchase authorisation, which would have taken total available authorisations to US$8.1 billion at September 30 after accounting for US$3.1 billion remaining under the previous approvals.
That enlarged buyback capacity arrives alongside a portfolio change. MPC announced the US$4.2 billion sale of its St. Paul Park and Mandan refineries and related midstream assets, with US$3.45 billion of proceeds allocated to MPC and US$750 million to MPLX. The transaction is expected to close at the end of 2026 and remains subject to the required conditions and approvals. MPC said it intends to direct its proceeds primarily towards Gulf Coast opportunities, while MPLX plans to redeploy its share into growth projects in the Permian and Marcellus basins.
MPLX distribution and renewable diesel results improve
MPLX increased its quarterly distribution by 12.5% for the third consecutive year, producing expected annual distributions of US$3.1 billion to MPC. Midstream adjusted EBITDA rose more modestly to US$1.9 billion from US$1.7 billion, supported by higher rates and throughputs, equity-affiliate income and acquisitions, partly offset by asset divestitures and higher operating expenses.
Renewable Diesel also moved from a US$56 million adjusted EBITDA loss to US$254 million of adjusted EBITDA. MPC cited stronger margins, improved regulatory credit values and higher throughput. The segment remains much smaller than refining, but the swing means it contributed positively rather than diluting the quarter’s performance.
Fourth-quarter guidance points to lower throughput and turnaround costs
MPC expects fourth-quarter refinery throughput of about 3.08 million barrels a day, below the 3.15 million barrels a day processed in the third quarter. It guides to US$5.60 a barrel in refining operating costs, US$1.725 billion in distribution costs and US$230 million in planned turnaround costs, with corporate costs forecast at US$300 million including US$60 million of depreciation and amortisation.
The company ended September with US$13.6 billion in cash, cash equivalents and short-term investments, including US$1.3 billion at MPLX, and no borrowings under its US$5 billion revolving credit facility. The immediate question is less whether the quarter was exceptional than how much of that earnings power persists when refining spreads and operating conditions normalise, particularly as MPC commits capital to Gulf Coast projects while changing the shape of its refinery network.
Bottom Line?
The quarter provides ample cash for distributions and reinvestment, but the durability of refining margins will determine how much of the enlarged capital-return programme can be sustained.
Questions in the middle?
- How much of MPC’s US$11.7 billion adjusted EBITDA can hold if refining crack spreads retreat from third-quarter levels?
- Will the St. Paul Park and Mandan sale close on schedule and deliver the intended Gulf Coast reinvestment benefits?
- Can MPLX’s large Permian and Marcellus project pipeline generate its targeted returns while supporting higher distributions to MPC?