US Refiners Set for Record Q3 Profits Driven by Surge in Diesel Margins

Key Facts

1Valero Energy, Marathon Petroleum, and Phillips 66 are expected to report Q3 profits exceeding their near-record Q2 results.

2Geopolitical conflicts in the Middle East and Ukraine have driven diesel crack spreads to record levels.

Valero Energy, Marathon Petroleum, and Phillips 66 are expected to report third-quarter profits exceeding their near-record second-quarter results, according to investinglive.com. Geopolitical conflicts in the Middle East and Ukraine have driven diesel crack spreads to record levels as global markets scramble for fuel supplies.

Marathon Petroleum (MPC) closed at $463.34 on October 8, 2026, while Phillips 66 (PSX) ended the same session at $281.6. Valero Energy (VLO) shares closed at $443.8 on October 8, 2026, reflecting a market environment where refined product prices have risen faster than crude costs, significantly boosting the margins for major US independent refiners.