Question 1

Who owns MPLXP stock?

Accepted Answer

MPLXP (MPLX LP) is held by 2 tracked superinvestors with an aggregate position value of $214M based on the most recent SEC 13F filings. Top institutional holders include: Glenn Greenberg, David Tepper.

Question 2

How much MPLXP do superinvestors hold in aggregate?

Accepted Answer

Across 2 tracked managers, superinvestors collectively report $214M in MPLXP positions worth 3,755,984 shares.

Question 3

What is the largest holder of MPLXP?

Accepted Answer

The largest tracked holder of MPLXP is Glenn Greenberg (Brave Warrior Advisors) with 3,253,524 shares worth $186M, representing 4.60% of their portfolio.

Investor	Fund	Shares	Value▼	% of Portfolio	Rpt Price	Period
Glenn Greenberg	Brave Warrior Advisors	3253524	$185.7M	4.60%	$57.07	Q1 2026
David Tepper	Appaloosa Management	502460	$28.7M	0.48%	$57.07	Q1 2026

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📊 Holdings Over Time

Quarter-by-Quarter Activity