Royal Bank of Canada reduced its stake in shares of Marathon Petroleum Corporation (NYSE:MPC – Free Report) by 14.5% in the 1st quarter, HoldingsChannel.com reports. Royal Bank of Canada’s holdings in Marathon Petroleum were worth $209,559,000 at the end of the most recent reporting period. Get Marathon Petroleum alerts:Insider Buying and SellingIn related news, VP Michael A. Henschen II sold 6,336 shares of Marathon Petroleum stock in a transaction dated Thursday, June 4th. Marathon Petroleum Stock PerformanceMPC stock opened at $309.09 on Thursday. Receive News & Ratings for Marathon Petroleum Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Marathon Petroleum and related companies with MarketBeat.com's FREE daily email newsletter.