64/100BMplx LP company profile
- CEO
- Maryann T. Mannen
- Employees
- 5,762
- Headquarters
- 200 East Hardin Street, Findlay, OH 45840-3229, US
- Sector
- Energy
- Industry
- Oil & Gas Midstream
- IPO date
- 26 Oct 2012
- Stock exchange
- NYSE
- ISIN
- US55336V1008
Website:mplx.com
About the company
MPLX LP, incorporated in 2012 and headquartered in Findlay, Ohio, operates as a subsidiary of Marathon Petroleum Corporation, with MPLX GP LLC serving as its general partner. The company is a prominent owner and operator of midstream energy infrastructure and logistics assets primarily across the United States. Its business is segmented into Logistics and Storage, and Gathering and Processing. MPLX's extensive operations involve the gathering, processing, and transportation of natural gas, alongside the gathering, transportation, fractionation, exchange, storage, and marketing of natural gas liquids. It also handles the collection, storage, transportation, and distribution of crude oil, refined products, and other hydrocarbon-based goods, including the sale of residue gas and condensate. Furthermore, the company manages inland marine businesses, focusing on the transportation of light products, heavy oils, crude oil, renewable fuels, chemicals, and feedstocks within the Mid-Continent and Gulf Coast regions, utilizing its owned and third-party chartered boats and barges, and maintaining a marine repair facility on the Ohio River. Complementing these activities, MPLX oversees fuel distribution, refining logistics, terminals, rail facilities, and storage caverns, and operates specialized terminal facilities for the receipt, storage, blending, additization, handling, and redelivery of refined petroleum products through various modes including pipeline, rail, marine, and over-the-road transport.
Employees
Mplx LP had about 5,762 employees at the end of fiscal year 2025 (31 December 2025), by its annual report. That is 3.6% more than a year before.
Employees at each fiscal year end, as the company reports them in its annual report (10-K); revenue and net income per employee are the fiscal year's over that count.
Who owns Mplx LP
Institutions such as funds, banks and insurers held 19.3% of Mplx LP's shares on 30 June 2026, 651 of them reporting holdings to the SEC; the rest is held by individual investors and other shareholders.
Shares free to trade
Closely held shares belong to insiders, founders and owners of more than 5%, and seldom change hands. The free float is the rest: the shares anyone can buy and sell.
Common questions about Mplx LP
Source: Financial Modeling Prep