Marathon Petroleum (MPC) saw its shares advance approximately 3.2% in Wednesday afternoon trading, reaching $240.05, as investors positioned themselves ahead of the company's first-quarter earnings report scheduled for May 5. The uptick comes amid a broader rally in the refining sector, driven by a sharp increase in fuel margins during the first three months of the year.
Phillips 66 (PSX) and Valero Energy (VLO) also posted gains, rising 4.2% and 3.3% respectively, after Phillips 66 reported an unexpected adjusted profit on Wednesday. The stronger-than-expected results from peers have fueled optimism that Marathon will deliver a robust earnings rebound. According to LSEG data, analysts project Marathon to report earnings of 86 cents per share, a significant turnaround from a loss of 24 cents per share in the same period last year.
Refining Margins Surge Amid Supply Concerns
The so-called crack spread—the difference between crude oil prices and the value of refined products like gasoline and diesel—has soared dramatically. Reuters reported that ultra-low sulfur diesel's crack spread hit a record $86.25 per barrel on March 20, while gasoline margins also climbed during the quarter. This surge has been attributed to supply disruptions linked to geopolitical tensions in the Middle East, which have pushed up margins across gasoline, diesel, and jet fuel.
"Refiners had a whirlwind Q1'26," said Matthew Blair, an analyst at Tudor, Pickering, Holt & Co, in comments to Reuters. He highlighted the spike in product cracks—refining margins—following the Iran conflict. The improved margins have put U.S. refiners back in focus, with Marathon, Phillips 66, and Valero all drawing investor attention.
Maintenance and Gasoline Prices Pose Risks
Despite the positive momentum, near-term risks remain. Marathon's Robinson refinery in Illinois, which has a capacity of 253,000 barrels per day, entered planned maintenance in mid-March. Several units are expected to remain offline through at least mid-May, according to Reuters. Such downtime can eat into the gains from higher margins, as reduced output limits the company's ability to capitalize on favorable pricing.
On the consumer side, U.S. gasoline prices have climbed sharply, reaching $4.18 per gallon on Tuesday—the highest level since 2022, according to AAA data cited by Reuters. While higher product prices boost refiner margins, they also raise concerns about demand destruction and potential regulatory scrutiny.
Strong Q4 Performance Sets the Stage
Marathon entered 2026 on solid footing. In the fourth quarter of 2025, the company reported adjusted earnings of $4.07 per share, a sharp increase from 77 cents per share in the prior-year period. Refining and marketing margins also improved, climbing to $18.65 per barrel from $12.93. The company returned $1.3 billion to shareholders during the fourth quarter, and as of the end of 2025, it had $4.4 billion remaining in its buyback authorization.
Cash returns remain a key attraction for investors. Marathon's commitment to returning capital through dividends and share repurchases has been a consistent theme, and the substantial buyback authorization provides a floor for the stock.
Market Focus Shifts to Forward Outlook
However, some analysts caution that much of the optimism may already be priced into the stock. Marathon's shares have climbed alongside other refiners, and the spotlight may shift from first-quarter results to management's commentary on the outlook for the remainder of the year. "The market will likely focus more on rest-of-year earnings," TD Cowen analyst Jason Gabelman told Reuters.
Marathon's first-quarter earnings conference call is scheduled for 11 a.m. ET on May 5. Investors will be listening for updates on refining margins, maintenance schedules, and the company's capital allocation plans. The broader refining sector's performance will also depend on how geopolitical developments and global supply dynamics evolve in the coming months.
