Investments and Noncontrolling Interests (Tables)

6 Months Ended

Jun. 30, 2026

Equity Method Investments and Joint Ventures [Abstract]

The following table presents MPLX’s equity method investments at the dates indicated:


		Ownership as of	Carrying value at
		June 30,	June 30,		December 31,
(In millions, except ownership percentages)	VIE	2026	2026		2025
Crude Oil and Products Logistics
Illinois Extension Pipeline Company, L.L.C.		35%	$	220	$	208
LOOP LLC		41%	304		313
MarEn Bakken Company LLC(1)		25%	492		502
Other(2)	X	17 - 67%	558		558
Total Crude Oil and Products Logistics			1,574		1,581
Natural Gas and NGL Services
MarkWest EMG Jefferson Dry Gas Gathering Company, L.L.C.	X	67%	396		407
MarkWest Utica EMG, L.L.C.	X	62%	957		890
Ohio Gathering Company L.L.C.(3)	X	31%	425		444
Sherwood Midstream LLC	X	50%	468		475
MXP Parent, LLC		10%	242		198
Texas City Logistics LLC	X	50%	316		163
WPC Parent, LLC		30%	272		273
Other(2)	X	10 - 51%	499		367
Total Natural Gas and NGL Services			3,575		3,217
Total			$	5,149	$	4,798

(1) The investment in MarEn Bakken Company LLC includes our 9.19 percent indirect interest in a joint venture (“Dakota Access”) that owns and operates the Dakota Access Pipeline and Energy Transfer Crude Oil Pipeline projects (collectively, the “Bakken Pipeline system”).

(2) Included within Other are certain equity method investments that have been deemed to be VIEs.

(3) MPLX also holds a 43 percent indirect interest in Ohio Gathering Company L.L.C. through our ownership interest in MarkWest Utica EMG, L.L.C.