Stock Ownership/MPLX

MPLX LP (MPLX): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in MPLX · Energy. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
8
13F filers
Aggregate Value
$264.5M
Across holders
Last Price
$59.67
2026-09-04
Sector
Energy
GICS
Quarterly fund activity2 increased1 reduced0 exited
Institutional Holders of MPLX
↗
8 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
Clearbridge Investments, LLC
CIK 0001348883
Hedge Fund2.34M$132.0M49.9%0.1%Unchanged+$0Q2 2026
BROOKFIELD Corp /ON/
CIK 0001001085
Hedge Fund1.36M$76.4M28.9%0.1%Reduced$-46.1MQ2 2026
Appaloosa LP
CIK 0001656456
Hedge Fund502K$28.3M10.7%0.4%Unchanged+$0Q2 2026
Rockefeller Capital Management L.P.
CIK 0001739439
Hedge Fund259K$14.6M5.5%0.0%Added$-24.5MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund209K$11.8M4.5%0.0%Added+$6.8MQ2 2026
Fulcrum Asset Management LLP
CIK 0001353395
Hedge Fund16K$902K0.3%0.1%Unchanged+$0Q2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund6K$355K0.1%0.0%Unchanged+$0Q2 2026
Ancora Advisors, LLC
CIK 0001446114
Hedge Fund3K$161K0.1%0.0%Added+$134KQ2 2026
Clearbridge Investments, LLCUnchanged
Hedge Fund
$132.0M· 49.9% of total· 0.1% port· 2.34M sh· +$0 QoQ· Q2 2026
BROOKFIELD Corp /ON/Reduced
Hedge Fund
$76.4M· 28.9% of total· 0.1% port· 1.36M sh· $-46.1M QoQ· Q2 2026
Appaloosa LPUnchanged
Hedge Fund
$28.3M· 10.7% of total· 0.4% port· 502K sh· +$0 QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$14.6M· 5.5% of total· 0.0% port· 259K sh· $-24.5M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$11.8M· 4.5% of total· 0.0% port· 209K sh· +$6.8M QoQ· Q2 2026
Fulcrum Asset Management LLPUnchanged
Hedge Fund
$902K· 0.3% of total· 0.1% port· 16K sh· +$0 QoQ· Q2 2026
Squarepoint Ops LLCUnchanged
Hedge Fund
$355K· 0.1% of total· 0.0% port· 6K sh· +$0 QoQ· Q2 2026
Ancora Advisors, LLCAdded
Hedge Fund
$161K· 0.1% of total· 0.0% port· 3K sh· +$134K QoQ· Q2 2026
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