MPLX LP owns and operates midstream energy infrastructure and logistics assets primarily in the United States. It operates in two segments, Logistics and Storage, and Gathering and Processing. The company is involved in the gathering, processing, and transportation of natural gas; gathering, transportation, fractionation, exchange, storage, and marketing of natural gas liquids; gathering, storage, transportation, and distribution of crude oil and refined products, as well as other hydrocarbon-based products; and sale of residue gas and condensate. It also engages in the inland marine businesses comprising transportation of light products, heavy oils, crude oil, renewable fuels, chemicals, and feedstocks in the Mid-Continent and Gulf Coast regions, as well as owns and operates boats and barges, including third-party chartered equipment, and a marine repair facility located on the Ohio River; and distribution of fuel, as well as operates refining logistics, terminals, rail facilities, and storage caverns. In addition, the company operates terminal facilities for the receipt, storage, blending, additization, handling, and redelivery of refined petroleum products located through the pipeline, rail, marine, and over-the-road modes of transportation. MPLX GP LLC acts as the general partner of MPLX LP. The company was incorporated in 2012 and is headquartered in Findlay, Ohio. MPLX LP operates as a subsidiary of Marathon Petroleum Corporation.

Investor	Date	% Owned	Market Value	Shares	Chg. Shares	Chg. Shares %	% Portfolio
Marathon Petroleum Corporation	2025-02-01	63.65526%	$33.28B	647.4M	—	—	—
ALPS Advisors, Inc.	2025-09-30	2.59665%	$1.36B	26.4M	310.8K	1.2%	5.9%
ALPS ETF Trust - Alerian MLP ETF	2025-10-31	2.56269%	$1.34B	26.1M	105.2K	0.4%	12.8%
Invesco Ltd.	2025-09-30	1.91859%	$1.00B	19.5M	141.1K	0.7%	0.3%
Harvest Fund Advisors LLC	2025-09-30	1.37825%	$720.65M	14.0M	-2.9M	-17.3%	9.8%
Tortoise Capital Advisors, L.L.C.
AIM Investment Funds (Invesco Investment Funds) - Invesco SteelPath MLP Income Fund
Goldman Sachs Asset Management, L.P.
Bank of America Corporation
Kayne Anderson Capital Advisors, L.P.
Mirae Asset Global Investments Co., Ltd.
Kayne Anderson Energy Infrastructure Fund, Inc.
Energy Income Partners LLC
Chickasaw Capital Management, LLC
UBS Asset Management AG
Tortoise Capital Series Trust - Tortoise Energy Infrastructure Total Return Fund
JPMorgan Chase & Co.
Global X Funds - Global X MLP ETF
Brave Warrior Advisors, LLC
ING Groep N.V.

MPLX LP

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