The current institutional shareholding score of MPLX LP is 3.00, ranking 66 out of 100 in the Oil & Gas Related Equipment and Services industry. The latest institutional shareholding proportion is 17.75%, representing a quarter-over-quarter decrease of 15.63%. The largest institutional shareholder is Bill Nygren | OAKMX, holding a total of 3.27M shares, representing 0.32% of shares outstanding, with 27.27% decrease in holdings.