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).

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

Valuation

Valuation · two methods

Earnings Power & Asset Floor

Two intrinsic-value methods and a tangible asset floor — deterministic, not price forecasts or recommendations.

This issuer has a multi-share-class structure; a blended per-share count is not available from the current data source, so a per-share floor is not computed here.

Ownership · 13F consensus

Who's buying it

Institutional ownership aggregated across funds — consensus strength and this quarter's moves. Describes actions, not advice.

2 superinvestors hold it · $214.4M combined

This quarter2 trimmed

Largest holder Glenn Greenberg

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

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Superinvestors Holding This Security

Investor	Value	Shares	Weight (prev→now)
Glenn Greenberg	$185.7M	3,253,524	5.6% → 4.6% ▼
David Tepper	$28.7M	502,460	0.5% → 0.5% ▼

Glenn Greenberg
Value$185.7MWeight (prev→now)5.6% → 4.6% ▼
David Tepper
Value$28.7MWeight (prev→now)0.5% → 0.5% ▼

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.

Holders over time

Superinvestors holding this security over the last 8 quarters: 2 → 2.

Early quarters may understate holder counts due to data backfill — read the slope with care.

Key facts & links

Ticker: MPLX
Total value held: $214.4M
Largest holder: Glenn Greenberg
External

Sources· SEC EDGAR 13F as of 2026-03-31 · filed 2026-05-15

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