MPLX LP

MPLX LP operates midstream energy infrastructure and provides logistics and fuel distribution services. The partnership functions through two primary segments: Crude Oil and Products Logistics, and Natural Gas and NGL Services. Its crude and refined products business gathers, transports, stores, and distributes crude oil, refined products, renewables, and hydrocarbon materials, alongside operating marine equipment, terminals, rail facilities, and storage caverns. Its natural gas unit conducts wellhead-to-market gathering, treating, processing, fractionation, and transmission of natural gas and natural gas liquids. Primary customers include its sponsor, Marathon Petroleum Corporation (MPC), as well as independent producers across major shale formations and retail fuel networks.

The partnership’s assets are located across the United States. Physical holdings include 14,853 miles of wholly and jointly owned crude and refined product pipelines, 1,401 miles of natural gas liquids pipelines, refining logistics infrastructure supporting 13 refineries, 88 terminals with rail and truck racks, an export terminal, and multiple storage caverns. Operating facilities also span natural gas gathering systems, processing plants, and fractionation units in key producing basins. The provided text does not specify the location of the partnership's headquarters.

Summary of the business section of Mplx Lp's latest annual report, written by StockData.

“As of December 31, 2025, our general partner and its affiliates had approximately 5,762 full-time employees that provide services to us under our employee services agreements.”