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Marathon Petroleum Subsidiaries and Acquisitions

Marathon Petroleum Corporation is an integrated energy company involved in refining, marketing, transportation, and the distribution of petroleum products. Through its subsidiaries and midstream affiliate MPLX LP, the company operates across different parts of the energy value chain.

Its subsidiaries support refining operations, pipeline transportation, storage terminals, logistics, and other energy-related activities. The company also expands its operations through acquisitions and strategic investments that help strengthen its infrastructure and business capabilities.

To understand Marathon Petroleum’s innovation activity, explore its patent portfolio and filing trends, including patent counts, filing activity, and the technologies it seeks to protect.

Top 5 Patent contributing subsidiaries of Marathon Petroleum

The table below highlights the top five patent-contributing subsidiaries of Marathon Petroleum. These entities contribute to innovation across petroleum refining, fuel production, oil and gas processing, energy technologies, and other areas of the energy sector.

While only the top five subsidiaries are featured here, our research covers a broader list of Marathon Petroleum subsidiaries and acquisitions. To access the complete list and explore their patent contributions, fill out the form below.

Rank Company Name Headquarter Patent Count
1 Marathon Petroleum Co China 0000
2 Virent, Inc United States 0000
3 Watson Cogeneration Co United States 0000
4 MarkWest Energy Partners LP United States 0000
5 Giant Industries Inc United States 0000

How many companies were acquired by Marathon Petroleum?

Marathon Petroleum’s subsidiary structure includes companies involved in refining, logistics, pipeline operations, terminal management, and other supporting business activities. The list contains 100 subsidiary records across six countries, the United States, Mexico, Canada, Peru, Singapore, and the United Kingdom.

Notable Acquisitions

  1. Northwind Midstream (2025) – Expands natural gas gathering and processing capabilities in the Permian Basin.
  2. BANGL, LLC (2025) – The planned acquisition of the remaining 55% ownership interest increases MPLX’s ownership and supports its natural gas liquids strategy.
  3. Matterhorn Express Pipeline (2025) – An additional ownership investment strengthens MPLX’s participation in natural gas transportation infrastructure.
  4. Whiptail Midstream (2025) – The acquisition of gathering assets expands midstream infrastructure.
  5. Marathon Coastal Holdings and Marathon Blue Water Holdings (2024) – The acquisition of the remaining ownership interest increases control over the relevant businesses.

List of Marathon Petroleum acquisitions

S. No.Acquiree NameAnnounced DatePrice
1Northwind Delaware Holdings LLCSep 2, 2025$2.375 B
2BANGL, LLCFeb 28, 2025$715 M  
3Matterhorn Express Pipeline2025  $151 M  
4Whiptail MidstreamMar 11, 2025  $235 M  
5Marathon Coastal HoldingsOct 1, 2024  $175 M  
6BANGL, LLCJul 31, 2024  $210 M  
7Utica MidstreamMar 22, 2024  $625 M  
8Wink to Webster Pipeline, LLC2024  $18 M  
9LF BioenergyMar 8, 2023  $50 M
10MXP Parent, LLC2025  $13 M  

List of Marathon Petroleum Subsidiaries

Marathon Petroleum has over 100 subsidiaries worldwide. Explore the list of Marathon Petroleum subsidiaries below. To access the full report covering its subsidiaries and acquisitions, fill out the form on the right.

S. No.CompanyCountry
1631 South Main Street Development LlcUnited States
2Andeavor Field Services LlcUnited States
3Andeavor Gathering LlcUnited States
4Andeavor LlcUnited States
5Andeavor Logistics LlcUnited States
7Andeavor Midstream Partners LlcUnited States
10Andeavor Servicios De MexicoMexico
11Asphalt Terminals LlcUnited States
12Beh Holding LlcUnited States
13Blanchard Pipe Line Company LlcUnited States
14Blanchard Refining Company LlcUnited States
15Blanchard Terminal Company LlcUnited States
16Buckeye Assurance CorporationUnited States
17Buffalo Terminal LlcUnited States
18Canton Refining Logistics LlcUnited States
19Carson Cogeneration LlcUnited States
20Catlettsburg Refining Logistics LlcUnited States
21Catlettsburg Refining LlcUnited States
22Cincinnati Biorefining CorpUnited States
23Cincinnati Renewable Fuels LlcUnited States
24Combustibles Playa RosaritoMexico
25Corn Oil And Renewable Energy LlcUnited States
26Dakota Prairie Refining LlcUnited States
27Detroit Refining Logistics LlcUnited States
28Galveston Bay Refining Logistics LlcUnited States
29Garyville Refining Logistics LlcUnited States
30Giant Industries IncUnited States
31Golden State Renewable Fuels LlcUnited States
32Gray Oak Gateway Holdings LlcUnited States
33Green River Processing LlcUnited States
34Hardin Street Holdings LlcUnited States
35Hardin Street Marine LlcUnited States
36Hardin Street Transportation LlcUnited States
37Kenai Lng LlcUnited States
38Kenai Pipe Line Company LlcUnited States
39Marathon Blue Water Holdings LlcUnited States
40Marathon Coastal Holdings LlcUnited States
41Marathon International Holdings LlcUnited States
42Marathon International Products Supply LlcUnited States
43Marathon Maritime CompanyUnited States
44Marathon Petroleum Canada Trading and Supply UlcCanada
45Marathon Petroleum Company Canada LtdCanada
48Marathon Petroleum Logistics Services LlcUnited States
49Marathon Petroleum MexicoMexico
50Marathon Petroleum Peru SRLPeru
51Marathon Petroleum Service Company LlcUnited States
52Marathon Petroleum Supply And Trading LlcUnited States
53Marathon Petroleum Supply LlcUnited States
54Marathon Petroleum Trading Canada LlcUnited States
55Marathon Pipe Line LlcUnited States
56Marathon Prepaid Card LlcUnited States
57Marathon Refining Logistics Services LlcUnited States
58Marathon Tanker Holdings LlcUnited States
59Marathon Trading And Supply Services LimitedUnited Kingdom
60Marathon Transporte De HidrocarburosMexico
61Markwest Agua Blanca Pipeline LLCUnited States
62Markwest Bluestone Ethane Pipeline LLCUnited States
63Markwest Energy East Texas Gas Company LLCUnited States
64Markwest Energy Finance CorporationUnited States
65Markwest Energy Operating Company LLCUnited States
66Markwest Energy Partners LPUnited States
67Markwest Energy West Texas Gas Company LLCUnited States
68Markwest Hydrocarbon LLCUnited States
69Markwest Liberty Bluestone LLCUnited States
70Markwest Liberty Ethane Pipeline LLCUnited States
71Markwest Liberty Gas Gathering LLCUnited States
72Markwest Liberty Midstream and Resources LLCUnited States
73Markwest Liberty Ngl Pipeline LLCUnited States
74Markwest Mariner Pipeline LLCUnited States
75Markwest Ohio Fractionation Company LLCUnited States
76Markwest Oklahoma Gas Company LLCUnited States
77Markwest Panola Utility Company LLCUnited States
78Markwest Pioneer LLCUnited States
79Markwest Pipeline Company LLCUnited States
80Markwest Ranger Pipeline Company LLCUnited States
81Markwest Tornado Gp LLCUnited States
82Markwest Utica Operating Company LLCUnited States
83Mpc Alaska Terminal Company LlcUnited States
84Mpc Finance CoUnited States
85Mpc International Holdings LlcUnited States
86Mpc Investment Fund IncUnited States
87Mpc Investment LlcUnited States
88Mpc Trade Receivables Co LtdUnited States
89Mpl Louisiana Holdings LlcUnited States
90Mplx Delaware Basin LlcUnited States
91Mplx Fuels Distribution LlcUnited States
92Mplx Gp LlcUnited States
93Mplx Logistics Holdings LlcUnited States
94Mplx LpUnited States
95Mplx Operations LlcUnited States
96Mplx Ozark Pipe Line LlcUnited States
97Mplx Terminal And Storage LlcUnited States
98Mplx Terminals LlcUnited States
99Mplxif LlcUnited States
100Mt Airy Terminal LlcUnited States
  • October 27, 2026

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