MPLX LP Overview

MPLX is a diversified, large-cap master limited partnership formed by Marathon Petroleum Corporation (MPC) that owns and operates midstream energy infrastructure and logistics assets, and provides fuels distribution services. MPLX’s assets include a network of crude oil and refined product pipelines; an inland marine business; light-product terminals; storage caverns; refinery tanks, docks, loading racks, and associated piping; and crude and light-product marine terminals. The company also owns crude oil and natural gas gathering systems and pipelines as well as natural gas and natural gas liquids (NGL) processing and fractionation facilities in key U.S. supply basins. 


Binding Open Season Announcement

MPLX LP has launched a binding open season to assess shipper interest in firm priority capacity on the SLC Core Pipeline system, located in Wyoming, to transport crude oil from Fort Laramie Station, Wyoming, to Wahsatch Station, Utah. The open season closes at noon CDT Oct. 23, 2020.

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MPLX statement on Tesoro High Plains Pipeline

On July 2, the Bureau of Indian Affairs issued a notice of trespass determination regarding MPLX’s Tesoro High Plains Pipeline in North Dakota. MPLX plans to appeal the determination. The pipeline remains operational, supplying crude oil to Marathon Petroleum Corporation’s Mandan refinery. Additionally, the Mandan refinery has various logistics options to secure crude oil supply, and Marathon Petroleum does not anticipate disruptions to its ability to meet customer commitments in the region. We are committed to respecting the rights of the Mandan, Hidatsa and Arikara Tribes members as we work with them to resolve this matter guided by our values of integrity, respect and collaboration.



As part of the nation’s critical infrastructure, our priority at MPLX is to protect our employees, contractors and the communities we serve while fulfilling our responsibility to provide the essential fuels and other products that keep the country running. We support local communities, especially those providing healthcare services, by matching essential supplies to what they need and can handle, at the right time. Starting the week of March 23, MPLX deployed its entire stock of personal protective equipment (PPE) to hospitals, healthcare organizations and its own facilities across the country. Over 570,000 N95 respirator masks have been delivered to 46 hospitals and healthcare organizations in 20 states. 

Click here to read our latest response to COVID-19.


Financial Results

Q3 2020 Earnings Conference Call
November 2, 2020 11:00 AM EST
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Annual Report

2019 Annual Report & 10-K
2019 Annual Report (PDF; 4MB)