Ticker · CUSIP 55336V100

MPLX

MLP
MPLX LP
Energy·Oil & Gas Midstream
···Share
Holders (tracked)
4
Combined shares
1,665,662
Combined value
$88.90M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
452024Q12025Q4

SEC event timeline

3 events
  1. Ken Griffin (Citadel Advisors) opened position2026-02-17
    +236,462 shares · 2025Q4
    13F
  2. David Tepper (Appaloosa) added2026-02-17
    +92,500 shares · 2025Q4
    13F
  3. David Tepper (Appaloosa) trimmed2025-11-13
    −43,500 shares · 2025Q3
    13F

Insider activity

No insider transactions in the last 30 days.
View full insider history for MPLX →

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
New positions1
Added to1
Trimmed0
—
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
6
$45.0M
2022Q2
4
$36.0M
2022Q3
5
$47K
2022Q4
5
$85.5M
2023Q1
5
$73.0M
2023Q2
5
$45.0M
2023Q3
5
$101.2M
2023Q4
5
$81.6M
2024Q1
5
$126.7M
2024Q2
5
$75.9M
2024Q3
4
$67.6M
2024Q4
5
$120.8M
2025Q1
4
$128.1M
2025Q2
4
$84.1M
2025Q3
3
$62.7M
2025Q4
4
$88.9M

Who owns MPLX

4 super-investors · 2025Q4
Tracked stake
1.67M
shares
Combined value
$89M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added1
#ManagerSharesValue
1David Tepper
Appaloosa
627.5K$33M
2Ken Griffin
Citadel Advisors
519.8K$28M
3Ken Griffin
Citadel Advisors
281.9K$15M
4Ken Griffin
Citadel Advisors
236.5K$13M

Recent moves

20 transactions
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