MPLX
MPLX
576 hedge funds and large institutions have $10.5B invested in MPLX in 2025 Q3 according to their latest regulatory filings, with 54 funds opening new positions, 221 increasing their positions, 123 reducing their positions, and 45 closing their positions.
80% more repeat investments, than reductions
Existing positions increased: 221 | Existing positions reduced: 123
48% more call options, than puts
Call options by funds: $143M | Put options by funds: $96.3M
20% more first-time investments, than exits
New positions opened: 54 | Existing positions closed: 45
0% more funds holding
Funds holding: 575 → 576 (+1)
0.65% less ownership
Funds ownership: 21.27% → 20.62% (-0.65%)
6% less capital invested
Capital invested by funds: $11.2B → $10.5B (-$672M)
7% less funds holding in top 10
Funds holding in top 10: 30 → 28 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
N
Natixis
Paris,
France
|
+$28.9M |
| 2 |
TCA
Tortoise Capital Advisors
Overland Park,
Kansas
|
+$16.7M |
| 3 |
AA
ALPS Advisors
Denver,
Colorado
|
+$16.5M |
| 4 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$15.4M |
| 5 |
Mirae Asset Global ETFs Holdings
Causeway Bay,
Hong Kong
|
+$15.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Blackstone Inc
New York
|
-$148M |
| 2 |
UBS Group
Zurich,
Switzerland
|
-$78.3M |
| 3 |
Victory Capital Management
San Antonio,
Texas
|
-$60.9M |
| 4 |
Goldman Sachs
New York
|
-$53.2M |
| 5 |
BC
Brookfield Corp
Toronto,
Ontario, Canada
|
-$47.3M |
MPLX Hedge Fund Activity: Q3 2025 in Review
576 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in MPLX (MPLX) for Q3 2025, worth a combined $10.5B — down 6% from $11.2B a quarter earlier.
Buyers outnumbered sellers: 54 funds opened new MPLX positions and 45 closed out — a net gain of 9 holders — while 221 added to existing stakes and 123 trimmed.
The largest buyer was Natixis, adding an estimated $28.9M. The largest seller was Blackstone Inc, cutting an estimated $148M.
- 576 institutional investors held MPLX (MPLX) as of Q3 2025, up from 575 in Q2 2025.
- Funds reported $10.5B of MPLX stock for Q3 2025, down 6% quarter-over-quarter.
- 54 funds opened new MPLX positions in Q3 2025 and 45 closed out, a net change of +9 holders.
- The largest MPLX buyer in Q3 2025 was Natixis, an estimated $28.9M added.
- The largest MPLX seller in Q3 2025 was Blackstone Inc, an estimated $148M sold.
Based on aggregated 13F filings for Q3 2025.