MPLX
MPLX
631 hedge funds and large institutions have $9.52B invested in MPLX in 2025 Q4 according to their latest regulatory filings, with 97 funds opening new positions, 230 increasing their positions, 134 reducing their positions, and 32 closing their positions.
203% more first-time investments, than exits
New positions opened: 97 | Existing positions closed: 32
200% more call options, than puts
Call options by funds: $218M | Put options by funds: $72.7M
72% more repeat investments, than reductions
Existing positions increased: 230 | Existing positions reduced: 134
10% more funds holding
Funds holding: 576 → 631 (+55)
3.09% less ownership
Funds ownership: 20.62% → 17.53% (-3.1%)
7% less funds holding in top 10
Funds holding in top 10: 28 → 26 (-2)
9% less capital invested
Capital invested by funds: $10.5B → $9.52B (-$979M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Blackstone Inc
New York
|
+$88M |
| 2 |
Morgan Stanley
New York
|
+$57.6M |
| 3 |
Citadel Advisors
Miami,
Florida
|
+$12.3M |
| 4 |
AP
Americana Partners
Houston,
Texas
|
+$11M |
| 5 |
Cohen & Steers
New York
|
+$9.87M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AA
ALPS Advisors
Denver,
Colorado
|
-$1.35B |
| 2 |
WHG
Westwood Holdings Group
Dallas,
Texas
|
-$115M |
| 3 |
IG
ING Group
Amsterdam,
Netherlands
|
-$73M |
| 4 |
Invesco
Atlanta,
Georgia
|
-$71.7M |
| 5 |
JP Morgan Chase
New York
|
-$71.6M |
MPLX Hedge Fund Activity: Q4 2025 in Review
631 institutional investors reported a position in MPLX (MPLX) for Q4 2025, worth a combined $9.52B — down 9.3% from $10.5B a quarter earlier.
Buyers outnumbered sellers: 97 funds opened new MPLX positions and 32 closed out — a net gain of 65 holders — while 230 added to existing stakes and 134 trimmed.
The largest buyer was Blackstone Inc, adding an estimated $88M. The largest seller was ALPS Advisors, cutting an estimated $1.35B.
- 631 institutional investors held MPLX (MPLX) as of Q4 2025, up from 576 in Q3 2025.
- Funds reported $9.52B of MPLX stock for Q4 2025, down 9.3% quarter-over-quarter.
- 97 funds opened new MPLX positions in Q4 2025 and 32 closed out, a net change of +65 holders.
- The largest MPLX buyer in Q4 2025 was Blackstone Inc, an estimated $88M added.
- The largest MPLX seller in Q4 2025 was ALPS Advisors, an estimated $1.35B sold.
Based on aggregated 13F filings for Q4 2025.