MPLX LP (MPLX)
PIPE LINES (NO NATURAL GAS)
MPLX LP (MPLX) is listed on the New York Stock Exchange, where it has traded since October 26, 2012.
- Listed On
- the New York Stock Exchange
- Listed Since
- October 26, 2012
- Employees
- 5,762
- Market Cap
- $58.3B
About MPLX LP
MPLX is a partnership that owns pipelines and gathering and processing assets with extensive holdings in the Appalachian and Permian regions. The asset base is made up of crude oil and refined products assets dropped down from Marathon Petroleum, its sponsor, and natural gas and natural gas liquids gathering and processing assets that were purchased or built.
Institutional ownership
In 13F filings for the quarter ended June 30, 2026, 625 institutions reported holding MPLX, with 190.2 million shares worth $10.7 billion in aggregate. The largest reported holder was Alps Advisors, with 28.6 million shares worth $1.6 billion. Of the 5 largest holders listed below, 2 added shares and 3 reduced their positions during the quarter.
| Institution | Shares | Value | Quarter change |
|---|---|---|---|
| Alps Advisors | 28,601,592 | $1.6B | Added 5.65% |
| Invesco Ltd | 18,273,448 | $1.0B | Added 0.04% |
| Blackstone | 12,956,943 | $730M | Reduced 15.59% |
| Goldman Sachs | 11,329,340 | $638M | Reduced 9.42% |
| Tortoise Capital Advisors | 10,500,469 | $591M | Reduced 20.81% |
Form 13F is a quarterly report that institutional investment managers with at least $100 million in qualifying securities file with the SEC. It lists long positions as of the last day of the quarter and is due within 45 days of quarter end, so these holdings describe that date rather than today.
Frequently asked questions
What is MPLX?
MPLX LP (MPLX) is listed on the New York Stock Exchange, where it has traded since October 26, 2012.
Who are the largest institutional holders of MPLX?
In 13F filings for the quarter ended June 30, 2026, the largest reported holders of MPLX were Alps Advisors, Invesco Ltd and Blackstone.
How many institutions own MPLX?
625 institutions reported a position in MPLX for the quarter ended June 30, 2026, worth $10.7 billion in total.
Did institutions buy or sell MPLX last quarter?
Of the 5 largest reported holders, 2 added shares and 3 reduced their positions during the quarter. Every reported holder and its change is on the SentiSense ownership page for MPLX.
Every reported institutional holder, plus insider and congressional trades in MPLX, on SentiSense.