MPLX LP MPLX

MPLX Company Overview

MPLX LP is a publicly traded master limited partnership focused on midstream energy infrastructure and logistics in the United States. Formed in 2012 by Marathon Petroleum Corporation, the partnership owns and operates assets that transport, store, process, and market crude oil, refined petroleum products, natural gas, and natural gas liquids (NGLs). MPLX operates primarily in the midstream segment of the energy industry, with activities spanning pipeline transportation, terminaling, fractionation, gathering, and processing services. Its cash flow is largely generated through fee-based contracts tied to long-term customer agreements, which reduces direct exposure to commodity price volatility relative to upstream energy producers.

The company’s principal business lines include its Logistics and Storage segment and its Gathering and Processing segment. The logistics business supports the movement and storage of crude oil and refined products, while the gathering and processing business focuses on natural gas and NGL infrastructure, particularly in major shale basins. MPLX serves integrated energy companies, refiners, producers, utilities, and industrial customers, with a significant commercial relationship tied to Marathon Petroleum. The partnership evolved through a series of acquisitions and dropdown transactions from Marathon Petroleum, including the acquisition of MarkWest Energy Partners in 2015, which significantly expanded its natural gas processing and NGL capabilities.