NEW YORK (Bloomberg) - Elliott Management renewed its push for Marathon Petroleum to split into three separate businesses, a move the hedge fund said would unlock more than $22 billion in value. Marathon should divide into separate retail, midstream and refining companies, the hedge fund founded by billionaire Paul Singer said Wednesday in a statement. Elliott said it owns about 2.5% of Marathon. Shares of the second-biggest U.S. refiner by market value jumped as much as 7%, the most since Dec. 26. Marathon has struggled to win investors’ confidence after buying rival Andeavor last year for $22 billion.