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.

New
Increased
Maintained
Reduced
Closed

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more call options, than puts

Call options by funds: $ | Put options by funds: $

more first-time investments, than exits

New positions opened: | Existing positions closed:

more funds holding

Funds holding:

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: 3028 (-2)

Holders
576
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
28
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$143M
Puts
$96.3M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
101
$6.12M
102
$6.04M
103
$5.95M
104
$5.73M
105
$5.65M
106
$5.41M
107
$5.21M
108
$5.16M
109
$4.99M
110
$4.86M
111
$4.84M
112
$4.45M
113
$4.37M
114
$4.36M
115
$4.34M
116
$4.25M
117
$4.23M
118
$4.22M
119
$4.19M
120
$4.17M
121
$4.12M
122
$4.12M
123
$4.07M
124
$4.01M
125
$3.84M