Institutional investors purchased a net $4.2 million shares of MPC during the quarter ended December 2014 and now own 87.25% of the total shares outstanding. This majority interest is a greater percentage than is typical for companies in the Oil Refining/Marketing industry and highlights that the smart money sees this stock as an important holding.
Mutual fund holders
Largest Quarterly Institutional Transactions
Latest Institutional Activity
STATE STREET GLOBAL ADVISORS LTD... Bought 843.4 Thousand shares of Marathon Petroleum