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 $207.5M, with Glenn Greenberg the largest holder.

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Mplx Lp

MPLX

Held by 2 superinvestors.

Price$58.36

Holders2

Total value$207.5M

SEC 10-K · fundamentals

Business quality

as of 2025-12-31

Valuation basis: trailing twelve months to 2026-06-30 — latest 10-K plus unaudited 10-Q filings.

Revenue growth: +5.8%
Net margin: 50.9%
ROE: —
FCF margin: 42.2%

Revenue $6.90B → $9.73B · 6y

Fundamentals data incomplete — read with care.

What makes a business high quality

Valuation · value band

Valuation

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.

Method & numbers

A conservative intrinsic-value band (zero-growth floor to growth-capped DCF) plus a tangible asset floor — not investment advice, not a buy/sell signal, and not a price target.

Valuation basis: trailing twelve months to 2026-06-30 — latest 10-K plus unaudited 10-Q filings.

How to read intrinsic value

SEC 13F · holders

Superinvestors Holding This Security

2 holders · $207.5M combined · this quarter +0 opened / -0 exited

This quarter1 trimmed

Holders 2 → 2 · last 8q

Investor	Value	Shares	Weight (prev→now)
Glenn Greenberg	$179.2M	3,180,534	4.6% → 3.9% ▼
David Tepper	$28.3M	502,460	0.5% → 0.4% ▼

Glenn Greenberg
Value$179.2MWeight (prev→now)4.6% → 3.9% ▼
David Tepper
Value$28.3MWeight (prev→now)0.5% → 0.4% ▼

SEC 13F · notes

Written summary

Mplx Lp (MPLX) is held by 2 of the superinvestors tracked on Compounder, with a combined $207.5M in reported 13F value. The largest position belongs to Glenn Greenberg, where it makes up 3.9% of the portfolio.

Other notable holders by value include David Tepper (0.4% of its book).

Over the latest quarter, 0 of the tracked filers opened a new position in MPLX, 0 added to existing ones, 1 trimmed, and 0 sold out entirely.

Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-06-30. 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.

How to read a 13F

SEC 13F · co-ownership

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Also on

Sources· SEC EDGAR 13F as of 2026-06-30 · filed 2026-08-14

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

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