Which superinvestors hold Mplx Lp (MPLX)?

Per the latest SEC 13F filings, 2 superinvestors hold Mplx Lp (MPLX): Glenn Greenberg, David Tepper. Combined value held is about $214.4M, with Glenn Greenberg the largest holder.

Mplx Lp

Held by 2 superinvestors (MPLX). Valuation data coming soon.

Educational data only — not investment advice. 13F positions are self-reported and can lag up to 45 days.

TickerMPLX

Holder count2

Total value held$214.4M

Largest holderGlenn Greenberg

External

Ownership overview

Mplx Lp (MPLX) is held by 2 of the superinvestors tracked on Compounder, with a combined $214.4M in reported 13F value. The largest position belongs to Glenn Greenberg, where it makes up 4.6% of the portfolio.

Other notable holders by value include David Tepper (0.5% of its book).

Over the latest quarter, 0 of the tracked filers opened a new position in MPLX, 0 added to existing ones, 2 trimmed, and 0 sold out entirely.

Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-03-31. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.

Superinvestors Holding This Security

Investor	Value	Shares	Weight
Glenn Greenberg	$185.7M	3,253,524	4.60%
David Tepper	$28.7M	502,460	0.48%

Glenn Greenberg
Value$185.7MShares3,253,524Weight4.60%
David Tepper
Value$28.7MShares502,460Weight0.48%

Stock valuation (intrinsic value / DCF) coming soon.

Sources· SEC EDGAR 13F as of 2026-05-15

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