MPLX LP (MPLX) Institutional Ownership and Insiders Activity

MPLX LP (MPLX) is widely held by institutional investors, with 4 tracked firms reporting positions valued at approximately $226.24M based on SEC Form 13F filings for the quarter ended March 31, 2026.

Brave Warrior Advisors is the largest disclosed holder, reporting approximately $185.68M in MPLX holdings in its latest filing.

Institutional ownership among tracked investors remains highly concentrated, with Brave Warrior Advisors representing the majority of disclosed value.