MPLX LP
MPLX- Exchange
- NYSE
- Industry
- Pipe Lines (No Natural Gas)
- SEC CIK
- 0001552000
No open-market purchases or sales by MPLX LP insiders were filed in the last 90 days; 639 institutions reported holding it in 13F filings for Q2 2026, worth $11.1B in total; Appaloosa is the only superinvestor holding it.
Superinvestors holding MPLX, Q2 2026
1 superinvestor reports holding MPLX LP on Form 13F, worth $28.3M in total. Weight is MPLX LP's share of each 13F portfolio; actions compare shares with Q1 2026.
| Superinvestor | % of portfolio | Shares | Value | vs. previous quarter |
|---|---|---|---|---|
| AppaloosaDavid Tepper | 0.4% | 502,460 | $28.3M | Unchanged |
Moves by quarter
Superinvestors that opened, added to, trimmed or sold out of MPLX each quarter, comparing shares with the quarter before. A superinvestor that didn't file for a quarter isn't listed, and isn't counted as selling.
Q1 2026
1 superinvestor holding at quarter end
- Reduced
- Appaloosa (−19.9%)
Q4 2025
1 superinvestor holding at quarter end
- Added
- Appaloosa (+17.3%)
Q3 2025
1 superinvestor holding at quarter end
- Reduced
- Appaloosa (−7.5%)
Q3 2024
1 superinvestor holding at quarter end
- Reduced
- Appaloosa (−5.4%)
Q2 2024
1 superinvestor holding at quarter end
- Reduced
- Appaloosa (−7.3%)
Q4 2023
1 superinvestor holding at quarter end
- Added
- Appaloosa (+262.0%)
Q2 2023
1 superinvestor holding at quarter end
- Reduced
- Appaloosa (−5.2%)
Q2 2022
1 superinvestor holding at quarter end
- Added
- Appaloosa (+59.8%)
Q1 2022
1 superinvestor holding at quarter end
- Reduced
- Appaloosa (−76.8%)
Q3 2021
1 superinvestor holding at quarter end
- Reduced
- Appaloosa (−5.0%)
Q2 2021
1 superinvestor holding at quarter end
- Reduced
- Appaloosa (−41.9%)