Marathon Petroleum Corporation (MPC) Cash Flow Statement

The OCF/NI ratio of 2.01 in 2026Q2 is elevated relative to the trailing average of 2.0, but the $2.6B working capital inflow is a key driver, likely reflecting LIFO inventory effects and favorable crude price movements. This suggests that the reported net income of $5.1B may understate cash generation in the quarter, but investors should monitor whether such working capital benefits are sustainable or reverse in coming periods.

The trajectory of FCF is highly volatile, with the 2026Q2 figure representing a dramatic recovery from the negative FCF in 2025Q1. This volatility is consistent with the refining cycle, where crack spreads and inventory gains drive cash flows. The FCF margin of 17.6% in 2026Q2 is well above the 5.8% average of the prior four quarters, suggesting a cyclical peak that may not be sustainable as margins normalize.

MPC's capital intensity is low relative to revenue, with CapEx/Revenue averaging around 2.3% over the period. This suggests that the company is prioritizing maintenance and regulatory compliance over expansion, consistent with a mature refining business. The relatively stable CapEx levels, despite revenue swings, indicate that management is not aggressively investing in growth, which may limit future capacity expansion but supports near-term cash returns.

The working capital volatility is a major driver of operating cash flow, with the 2026Q2 inflow likely reflecting inventory valuation gains from rising crude prices. This pattern is typical for refiners using LIFO accounting, where inventory profits can inflate cash flow. Investors should be cautious about extrapolating this quarter's cash generation, as working capital reversals could weigh on future OCF.

Capital deployment is heavily skewed toward share repurchases, which have averaged over $1.5B per quarter, while dividends remain stable at around $290M. This aggressive buyback program suggests management's confidence in the company's cash generation, but it also reduces the share count, potentially boosting EPS. However, the sustainability of such buybacks depends on maintaining high refining margins, which are cyclical.

The cumulative gap between OCF and net income is substantial, with OCF totaling $28.3B versus net income of $12.9B. This divergence is partly due to non-cash D&A charges and working capital swings, but it also suggests that reported earnings may understate the company's cash-generating ability. However, the gap is not uniform, and investors should monitor whether this trend persists or reverses as refining margins normalize.