MPC 10-Q filed 2026-11-03 | Key takeaways
MPC filed its 10-Q; the most relevant disclosure change is added Subsequent events: MPC announced on November 2, 2026 a definitive agreement to divest its St. Paul Park, Minnesota and Mandan, North Dakota refineries and related midstream assets for $4.2 billion in cash, subject to working capital, inventory and other closing adjustments. The.
Key takeaways
Refining & Marketing adjusted EBITDA surged to $9.90 billion in Q3 2026 from $1.76 billion in Q3 2025, with margin per barrel increasing to $34.15 from $6.37, driven by higher crack spreads and stable demand.
Renewable Diesel segment adjusted EBITDA was $254 million versus a loss of $56 million in Q3 2025, driven by improved regulatory credit values and increased sales volumes.
MPC announced on November 2, 2026 a definitive agreement to divest its St. Paul Park, Minnesota and Mandan, North Dakota refineries and related midstream assets for $4.2 billion in cash, expected to close Q4 2026.
The board approved an additional $5.0 billion share repurchase authorization on November 3, 2026; $3.12 billion remained under the May 2026 authorization as of September 30, 2026.
MPLX issued $3.25 billion in senior notes during 2026 (including $1.25B at 4.700% due 2029, $500M at 5.000% due 2032, $500M at 5.500% due 2036) and redeemed $2.75 billion of maturing or called notes.
Key metrics
Disclosure changes
- Subsequent events
MPC announced on November 2, 2026 a definitive agreement to divest its St. Paul Park, Minnesota and Mandan, North Dakota refineries and related midstream assets for $4.2 billion in cash, subject to working capital, inventory and other closing adjustments. The carrying value of the associated net assets was $1.8 billion as of September 30, 2026, reported within Refining & Marketing and Midstream segments. Transaction expected to close in Q4 2026 pending customary closing conditions and regulatory approvals.
Strategic portfolio repositioning; the $4.2B transaction price implies a 2.3x book value multiple and represents a significant disposition that will reduce refining capacity by approximately 155 mbpd. - Short-term investments
Short-term investments of $804 million as of September 30, 2026, consisting primarily of fixed term deposits with various banks carried at amortized cost. This is a new disclosure line item not present in prior periods.
Company is deploying excess cash into short-term investments; provides transparency on liquidity allocation beyond cash and cash equivalents. - Equity – share repurchase authorizations
On May 5, 2026, MPC's board approved a $5.0 billion share repurchase authorization; as of September 30, 2026, $3.12 billion remained. On November 3, 2026, an additional $5.0 billion share repurchase authorization was approved.
Board continues to prioritize capital return; the new $5.0B authorization provides capacity for approximately $8.1B in total future repurchases. - Debt – MPLX senior notes activity
MPLX issued $3.25 billion in senior notes in 2026 (February: $1.5B; August: $2.25B) and repaid/redemed $2.75 billion of maturing or called notes (March: $1.5B 1.750% notes; September: $1.25B 4.125% notes due March 2027).
MPLX continues to actively manage its debt maturity profile; the August 2026 issuances provided proceeds used to redeem the March 2027 maturity ahead of schedule. - Other current liabilities – environmental credits liability
Environmental credits liability increased to $1.60 billion at September 30, 2026 from $463 million at December 31, 2025, representing RIN obligations and other environmental credit liabilities.
The $1.14 billion increase reflects higher RIN costs and obligations under the Renewable Fuel Standard program; this liability is tied to compliance costs that directly impact refining margins. - Derivatives – Strategic Petroleum Reserve obligation
MPC received approximately 21 million barrels of crude oil from the SPR during Q2 and Q3 2026 and is obligated to return approximately 26 million barrels from April 2027 through July 2029. Derivative liabilities related to the SPR return obligation totaled $1.9 billion at September 30, 2026.
The SPR exchange creates a material future crude oil delivery obligation that is being hedged; the $1.9B derivative liability represents the fair value of the obligation to return crude in 2027-2029.
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