Institutional investors hold a majority ownership of MPC through the 85.18% of the outstanding shares that they control. This interest is also higher than at almost any other company in the Oil Refining/Marketing industry. Last, during the quarter ended June 2015, these large investors purchased a net $7.9 million shares.
Mutual fund holders
Largest Quarterly Institutional Transactions
Latest Institutional Activity
BLACKROCK ADVISORS LLC Bought 3.9 Million shares of Marathon Petroleum
AQR CAPITAL MANAGEMENT LLC Bought 1.9 Million shares of Marathon Petroleum
JPMORGAN INVESTMENT MANAGEMENT, ... Bought 1.7 Million shares of Marathon Petroleum