Mplx Lp (MPLX) Institutional Ownership

Ownership Summary

Mplx Lp (NYSE:MPLX) has 602 institutional investors with active 13F positions as of December 2025.

• They owned 17.0% of outstanding stock in December 2025, down from 21.7% the prior quarter.
• They decreased total shares held in Mplx by -20.21% from the prior quarter, while the number of investors in MPLX increased 17.35% year over year.
• During the quarter, 311 of these 602 funds increased positions in MPLX, 130 reduced exposure, and 161 held steady.
• The aggregate institutional position in Mplx amounted to 172.99Mn shares as of December 2025, down by 43.83Mn shares quarter on quarter, and down 51.74Mn shares year over year.
• ALPS ADVISORS INC holds the largest position in MPLX at 27.07Mn shares as of December 31, 2025, or 2.66% of shares outstanding.
• Leading buyers of Mplx shares for the quarter ending December 2025 were ALPS ADVISORS INC (26.64Mn), Bank Of Montreal /Can/ (4.02Mn), CIBC Bancorp USA Inc. (2.64Mn), Westwood Holdings Group Inc (2.19Mn), FMR LLC (1.69Mn).
• The largest sales of MPLX for the quarter ending December 2025 came from Goldman Sachs Group Inc (12.42Mn), Bank Of America Corp /De/ (5.96Mn), Brave Warrior Advisors, LLC (1.22Mn), Ing Groep Nv (1.14Mn), Morgan Stanley (798.91K).
• Per Business Quant, the top 10 investors in MPLX for the quarter ending December 2025 include ALPS ADVISORS INC (27.07Mn), Invesco Ltd. (18.27Mn), Blackstone Inc. (15.35Mn), TORTOISE CAPITAL ADVISORS, L.L.C. (13.26Mn), Goldman Sachs Group Inc (12.51Mn), MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. (7.32Mn), KAYNE ANDERSON CAPITAL ADVISORS LP (6.83Mn), UBS Group AG (5.23Mn), Energy Income Partners, LLC (5.16Mn), Morgan Stanley (4.96Mn).