MPLX Lp (MPLX) Cash Flow Statement

The OCF/NI ratio has been above 1.0 in nine of the last ten quarters, with the only exception being 2025Q3 at 0.93, which coincided with a large acquisition outflow. This suggests that reported net income is well-backed by cash generation, and the gap between the two is primarily attributable to non-cash depreciation and amortization, which averaged around $340 million per quarter. The consistency of this conversion implies that earnings are not being inflated by aggressive revenue recognition or other accrual-based accounting.

The FCF margin has ranged from 25.3% to 55.2% over the past ten quarters, with the 2025Q3 outlier driven by a $3.4B acquisition outflow that temporarily depressed FCF. Excluding that quarter, FCF margins have been relatively stable in the 25-50% range, indicating that the core business generates substantial free cash flow. The recent decline in FCF margin to 26.5% in 2026Q2 is attributable to a significant increase in capex to $825M, which may signal a shift toward growth investments, but the absolute FCF of $877M remains robust.

The capex-to-revenue ratio has more than tripled over the past two years, suggesting that MPLX is investing heavily in growth projects, likely in natural gas and NGL infrastructure. This elevated capital intensity may pressure near-term free cash flow, but it aligns with management's guidance raise and the integration of new projects. Investors should monitor whether this capex translates into incremental cash flows, as the current level of spending is well above the depreciation run-rate of approximately $350 million per quarter, implying a net investment in future capacity.

The working capital changes are small relative to operating cash flow, suggesting that MPLX does not experience significant cash drag from its balance sheet items. The positive working capital changes in some quarters, such as $313M in 2025Q2, may reflect favorable timing of collections or payables, but the overall impact is immaterial. This stability is consistent with a fee-based midstream business where working capital requirements are low and predictable.

Over the past ten quarters, MPLX has paid out more in distributions than it generated in free cash flow, with the shortfall averaging around $200-300 million per quarter. This suggests that the distribution is not fully covered by FCF, but the company's $2.1B cash balance and access to credit markets may bridge the gap. The recent increase in buybacks, albeit modest, further indicates a commitment to returning capital, but investors should monitor the sustainability of this payout if capex remains elevated.

The cumulative gap of $3.7B between operating cash flow and net income is primarily attributable to non-cash depreciation and amortization, which totaled approximately $3.3B over the same period. This indicates that MPLX's earnings are not being inflated by aggressive accruals, and the company is generating cash well above its reported profitability. The consistency of this divergence suggests that the business model is cash-generative and that the reported net income is a reliable indicator of economic performance.