In the latest trading session, Marathon Petroleum’s shares fell by 2.58%, underperforming the broader energy sector which posted modest gains. Trading volume was 15% above its 30-day average, indicating heavy selling interest. Analysts attribute the decline to a rotation out of mid-cap refiners ahead of key earnings announcements, even as refining margins have held near multi-year highs.

Marathon Petroleum continues to benefit from one of the highest crude capacity utilization rates in the U.S. refining complex, operating at 95% in Q3. The company’s integrated downstream and midstream model drove adjusted EBITDA of $3.2 billion in the third quarter, supported by a refining margin of $17.60 per barrel—up from $14.63 per barrel a year earlier. Energy costs per barrel remained 8% below the industry average, reflecting long-term feedstock supply contracts and access to discounted domestic heavy crudes.

Marathon’s Garyville refinery, with a processing capacity of 606,000 barrels per day, is among the world’s largest heavy sour crude facilities. Pipeline constraints from Canada have widened the WTI-WCS spread to roughly $12 per barrel, disadvantaging Gulf Coast refiners, but potential U.S. sanctions relief on Venezuelan exports could tilt heavy-light spreads in Marathon’s favor. Management estimates the company could capture 20%–30% of any incremental Venezuelan heavy crude flows, supporting sustained high utilization and marketing margins.

Marathon Petroleum will report full-year 2025 and fourth-quarter results on February 3, 2026, with a conference call at 11 a.m. EST. Financial information, including the earnings release and presentation slides, will be available on the company’s investor relations website in advance. The call will be hosted by Kristina Kazarian, Vice President Finance and Investor Relations, alongside other senior executives who are expected to discuss refining throughput guidance, midstream capital expenditures, and renewable diesel project updates.