Who owns MPLX?
MPLX is owned by Marathon Petroleum (the United States, NYSE: MPC).[1]
Evidence: Marathon Petroleum Corporation Annual Report on Form 10-K filed 2026-02-26, SEC EDGAR, 26 February 2026. Verified from filings; last checked .
Key facts
- Current owner
- Marathon Petroleum Corporation verified
- Owner HQ
- 🇺🇸 United States, Findlay
- Origin
- 🇺🇸 United States
- Category
- Energy › Oil & gas › Pipelines & midstream
- Parent ticker
- NYSE: MPC
- Last verified
- · 1 sources
About MPLX
MPLX is the midstream partnership whose general partner Marathon Petroleum owns, together with about 64 percent of its common units at 31 December 2025, according to the 2025 Form 10-K.
What Marathon Petroleum's annual report says about MPLX
Sentences about MPLX from Marathon Petroleum's latest annual filing[1], copied word for word.
MPLX is a diversified, large-cap master limited partnership ("MLP") formed in 2012 that owns and operates midstream energy infrastructure and logistics assets and provides fuels distribution services.
As of December 31, 2025, we owned the general partner of MPLX and approximately 64 percent of the outstanding MPLX common units.
Terminals and Transportation We transport, store and distribute crude oil, feedstocks and refined products through pipelines, terminals and marine fleets owned by MPLX and third parties in our market areas.
How often Marathon Petroleum names MPLX in its annual report
A plain count of the times the name appears in the text of each annual report, not counting the start of a sentence. A brand that an owner writes about more is usually one it treats as central. The brand is named more often than it was three years earlier.
Ownership timeline of MPLX
- Current owner Marathon Petroleum [1] verified
Where MPLX sits in Marathon Petroleum
Controlling ownership as of . Brands grouped under the entity that owns them; large groups are collapsed.
Open the full Marathon Petroleum ownership tree →
See the full Marathon Petroleum brand portfolio (2) →
Other brands owned by Marathon Petroleum
Marathon Petroleum controls 2 brands on Brandtree, 2 of them in energy.
Also in energy
Other brands in pipelines & midstream, and who owns them
The 35 brands in pipelines & midstream on Brandtree belong to 21 owners. The largest is Energy Transfer, with 4.
| Brand | Owner | Owner based in |
|---|---|---|
| Dakota Access Pipeline | Energy Transfer | 🇺🇸 United States |
| Dixie Pipeline | Enterprise Products | 🇺🇸 United States |
| Basin Pipeline | Plains All American | 🇺🇸 United States |
| MountainWest | Williams | 🇺🇸 United States |
| Corpus Christi LNG | Cheniere | 🇺🇸 United States |
| Cenit | Ecopetrol | 🇨🇴 Colombia |
| Enbridge Mainline System | Enbridge | 🇨🇦 Canada |
| Columbia Pipeline Group | TC Energy | 🇨🇦 Canada |
About the owner: Marathon Petroleum
Marathon Petroleum is a publicly listed company headquartered in Findlay, United States. Brandtree records 2 brands under its control, and it is listed as NYSE: MPC.
Marathon Petroleum is a Delaware company incorporated on 9 November 2009 with its principal office at 539 South Main Street, Findlay, Ohio, according to its 2025 Form 10-K. It operates 11 refineries with about 3.0 million barrels a day of capacity, owns the general partner of MPLX and about 64 percent of its common units at 31 December 2025, and sold Speedway to 7-Eleven in May 2021.
Marathon Petroleum: full profile, brands and acquisition history →
🇺🇸 MPLX and other American brands
Brandtree records a controlling owner for 2,399 brands that began in the United States. 461 of them (19%) are now controlled by a company headquartered in another country; MPLX is not one of them.
- AES Ohio — AES 🇺🇸
- Agway Energy Services — Suburban Propane 🇺🇸
- Alabama Power — Southern Company 🇺🇸
- AmeriGas — UGI 🇺🇸
- American Transmission Company — WEC Energy Group 🇺🇸
- Arch Resources — Core Natural Resources 🇺🇸
Frequently asked questions
Who is the parent company of MPLX?
The parent company of MPLX is Marathon Petroleum, a publicly listed company headquartered in the United States.
Is MPLX American?
Yes. MPLX originated in the United States and its owner, Marathon Petroleum, is also headquartered in the United States.
Is MPLX still owned by Marathon Petroleum?
Yes. As of 11 October 2026, MPLX is still owned by Marathon Petroleum. The ownership record was last checked against primary sources on that date.
Sources (1) & corrections
Last verified . Every ownership fact above is backed by one of these primary documents. Numbers in brackets in the text refer to this list.
- [1] Marathon Petroleum Corporation Annual Report on Form 10-K filed 2026-02-26 — SEC EDGAR, SEC Form 10-K, published 26 February 2026; retrieved 5 October 2026.
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