MPLX LP — 2023 Form 10-K Summary
Business context and reporting period
MPLX is a U.S. midstream master limited partnership sponsored by Marathon Petroleum Corporation (MPC). Its Logistics and Storage (L&S) segment transports, stores and distributes crude oil, refined products and other products; Gathering and Processing (G&P) gathers and processes natural gas and handles natural gas liquids. This filing covers the fiscal year ended December 31, 2023, with comparisons to 2022.
MPC owned approximately 65% of MPLX’s common units at year-end and accounted for 50% of 2023 revenue and other income. MPC represented 87% of L&S segment revenue and other income.
Key financial metrics
| Metric | 2023 | 2022 |
|---|---|---|
| Revenue and other income | $11.281 billion | $11.613 billion |
| Income from operations | $4.900 billion | $4.911 billion |
| Net income | $3.966 billion | $3.978 billion |
| Net income attributable to MPLX LP | $3.928 billion | $3.944 billion |
| Common-unit diluted earnings per unit | $3.80 | $3.75 |
| Adjusted EBITDA attributable to MPLX LP (non-GAAP) | $6.269 billion | $5.775 billion |
| DCF attributable to MPLX LP (non-GAAP) | $5.340 billion | $4.981 billion |
| Net cash provided by operating activities | $5.397 billion | $5.019 billion |
| Adjusted free cash flow (non-GAAP) | $4.135 billion | $4.069 billion |
| Adjusted free cash flow after distributions (non-GAAP) | $839 million | $1.022 billion |
Reported operating margin, calculated as income from operations divided by revenue and other income, was approximately 43.4% in 2023 versus 42.3% in 2022. This ratio includes revenue streams with different economics, including product sales and equity-method income.
Segment Adjusted EBITDA increased to $4.228 billion for L&S from $3.818 billion and to $2.041 billion for G&P from $1.957 billion. MPLX paid $3.3 billion in distributions during 2023; declared common-unit distributions were $3.25 per unit for the year. The quarterly rate rose 10% to $0.85 beginning with the third quarter.
At December 31, cash and cash equivalents were $1.048 billion, compared with $238 million a year earlier. Aggregate principal debt was $20.7 billion; scheduled 2024 debt payments, including finance leases, were approximately $1.151 billion. Available liquidity was $4.548 billion, including $3.5 billion of undrawn revolving facilities. The credit-agreement leverage ratio was 3.3x against a 5.0x covenant limit. Net debt using aggregate principal debt less cash was approximately $19.7 billion.
Changes versus 2022
- Revenue and other income declined $332 million, or about 3%, while net income attributable to MPLX was nearly flat. Lower NGL prices and the absence of a $509 million 2022 lease-reclassification gain were key factors.
- Adjusted EBITDA attributable to MPLX rose $494 million, and DCF rose $359 million. Higher tariffs and throughput, fee escalations, and improved equity-method investment results helped offset weaker commodity-related revenue.
- Operating cash flow increased $378 million. Adjusted free cash flow after distributions declined $183 million, reflecting higher investing outflows and distributions.
- Capital expenditures totaled $903 million, versus $855 million. MPLX acquired the remaining 40% of Permian G&P joint venture Torñoado for approximately $303 million, consolidated it, and recognized a $92 million remeasurement gain.
- MPLX issued $1.6 billion of senior notes, redeemed $600 million of Series B preferred units, and repaid $1.0 billion of senior notes due in 2023. Series B preferred units are no longer outstanding.
Outlook, risks, contingencies and unusual items
MPLX announced a 2024 capital outlook of $1.1 billion net of reimbursements: $950 million for growth and $150 million for maintenance. Growth spending is focused on the Marcellus and Permian basins, including new gas processing plants and expansions or debottlenecking of existing assets. The outlook excludes an expected approximately $100 million contribution toward Dakota Access joint-venture debt repayment.
Management cited capital discipline, cost control, portfolio optimization and stable fee-based cash flows as priorities. The company expects cash generated from operations, borrowing capacity and capital-market access to meet funding needs, including capital spending and distributions, but stated that actual results remain subject to risks and uncertainty.
- Customer concentration: MPC is a major revenue source, particularly for L&S. A change in MPC’s operations, financial condition or use of MPLX assets could affect results and distributions.
- Debt and distribution exposure: Significant debt, interest-rate changes, refinancing needs and operating cash-flow variability could constrain financial flexibility or distributions. The $1.5 billion MPC revolving loan agreement was due to expire July 31, 2024, with MPC retaining a right to demand repayment; it had no balance at year-end.
- Commodity, volume and project risks: Producer activity, commodity prices, customer volumes, competition, construction costs and project timing can affect throughput and returns. No open commodity hedges were outstanding at year-end, apart from a $61 million embedded derivative liability.
- Legal and operational matters: The Dakota Access Pipeline remained operational while the Army Corps prepared its final Lake Oahe easement decision, expected by year-end 2024. MPLX disclosed maximum potential undiscounted contingent contributions of approximately $170 million. The Tesoro High Plains Pipeline section at issue remained shut down amid trespass litigation. Federal and state enforcement proceedings relate to the 2022 Edwardsville crude-oil release and earlier pipeline incidents; the penalty amount and resolution timing were not clear.
- Incident and environmental exposure: An August 2023 naphtha release and fire at the Garyville Tank Farm destroyed four tanks totaling 894,000 barrels of shell capacity. MPLX incurred $16 million of response costs net of insurance recoveries. Environmental regulation, PFAS requirements, methane rules, climate-related policy and permitting uncertainty may increase costs or delay projects; expected 2024 environmental capital expenditures were approximately $31 million.
- Unusual comparability items: 2022 included a $509 million lease-reclassification gain. 2023 included the $92 million Torñoado remeasurement gain and $16 million of Garyville response costs net of insurance.
The financial statements received an unqualified audit opinion, and the auditor also concluded internal control over financial reporting was effective. The audit identified goodwill impairment testing for the Crude Gathering reporting unit as a critical audit matter; no impairment was recorded in 2023.
Most important facts for investors to verify
- How much of recurring cash generation and distribution support depends on MPC, and the renewal terms and minimum-volume protections in MPC contracts.
- Whether the 2024 growth-capital program and planned Marcellus and Permian projects meet cost, schedule and return expectations.
- Debt maturities, refinancing plans, covenant headroom and the status of the MPC loan agreement after its stated July 2024 expiry.
- The final Dakota Access easement decision, potential contribution obligations and developments in the Tesoro High Plains and pipeline-enforcement matters.
- Distribution coverage using MPLX’s non-GAAP DCF definitions, and whether adjusted free cash flow after distributions remains adequate after planned investment.