Institutional shares held 219 Million
2.65M calls
1.22M puts
Total value of holdings $11.2B
$136M calls
$62.4M puts
Market Cap $51.5B
1,006,280,000 Shares Out.
Institutional ownership 21.78%
# of Institutions 656


Latest Institutional Activity in MPLX

Top Purchases

Q3 2025
Alps Advisors Inc Shares Held: 26.4M ($1.35B)
Q3 2025
Sequoia Financial Advisors, LLC Shares Held: 197K ($10.1M)
Q3 2025
Chickasaw Capital Management LLC Shares Held: 5.61M ($287M)
Q3 2025
Stephens Inc Shares Held: 130K ($6.67M)
Q3 2025
Turtle Creek Wealth Advisors, LLC Shares Held: 144K ($7.35M)

Top Sells

Q3 2025
Ing Groep Nv Shares Held: 4.3M ($220M)
Q3 2025
Fractal Investments LLC Shares Held: 2.05M ($105M)
Q3 2025
Allianz Asset Management Gmb H Shares Held: 912K ($46.7M)
Q3 2025
Greenup Street Wealth Management LLC Shares Held: 34.4K ($1.76M)
Q3 2025
Exchange Traded Concepts, LLC Shares Held: 379K ($19.4M)

About MPLX

MPLX LP owns and operates midstream energy infrastructure and logistics assets primarily in the United States. It operates in two segments, Logistics and Storage, and Gathering and Processing. The company is involved in the gathering, processing, and transportation of natural gas; gathering, transportation, fractionation, exchange, storage, and marketing of natural gas liquids; gathering, storage, transportation, and distribution of crude oil and refined products, as well as other hydrocarbon-based products; and sale of residue gas and condensate. It also engages in the inland marine businesses comprising transportation of light products, heavy oils, crude oil, renewable fuels, chemicals, and feedstocks in the Mid-Continent and Gulf Coast regions, as well as owns and operates boats and barges, including third-party chartered equipment, and a marine repair facility located on the Ohio River; and distribution of fuel, as well as operates refining logistics, terminals, rail facilities, and storage caverns. In addition, the company operates terminal facilities for the receipt, storage, blending, additization, handling, and redelivery of refined petroleum products located through the pipeline, rail, marine, and over-the-road modes of transportation. MPLX GP LLC acts as the general partner of MPLX LP. The company was incorporated in 2012 and is headquartered in Findlay, Ohio. MPLX LP operates as a subsidiary of Marathon Petroleum Corporation.


Insider Transactions at MPLX

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
169K Shares
From 15 Insiders
Grant, award, or other acquisition 165K shares
Open market or private purchase 4K shares
Sell / Disposition
62.7K Shares
From 8 Insiders
Payment of exercise price or tax liability 58.7K shares
Open market or private sale 4K shares

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