# MPLX LP (MPLXP) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 55336V100
Page URL: https://superinvestorclub.com/stock/MPLXP
Last updated: 2026-07-08T12:32:20.131Z

## Summary

As of the most recent 13F filing period, MPLX LP (MPLXP) is held by 2 tracked superinvestors with an aggregate position value of $214.4M representing 03253524502460 shares.

## Top institutional holders (2)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Glenn Greenberg](https://superinvestorclub.com/manager/36) | Brave Warrior Advisors | 3253524 | $185.7M | 4.60% | 2026-03-31 |
| 2 | [David Tepper](https://superinvestorclub.com/manager/8) | Appaloosa Management | 502460 | $28.7M | 0.48% | 2026-03-31 |

## Ownership history (quarter-over-quarter)

- 2024-03-31: 2 holders, $153.2M aggregate, 03025609660000 shares
- 2024-06-30: 2 holders, $206.4M aggregate, 04235478611500 shares
- 2024-09-30: 2 holders, $222.8M aggregate, 04432966578500 shares
- 2024-12-31: 2 holders, $239.1M aggregate, 04418154578500 shares
- 2025-03-31: 2 holders, $264.5M aggregate, 04364086578500 shares
- 2025-06-30: 2 holders, $250.0M aggregate, 04275033578500 shares
- 2025-09-30: 2 holders, $249.9M aggregate, 04467474535000 shares
- 2025-12-31: 2 holders, $272.3M aggregate, 04474115627500 shares
- 2026-03-31: 2 holders, $214.4M aggregate, 03253524502460 shares

## Recent congressional trades (0)


## Recent insider transactions (0)


## Citation

When citing, use: "MPLX LP (MPLXP) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/MPLXP), aggregating SEC 13F, Form 4, and congressional disclosures."