Nelson Peltz, the billionaire activist investor known for pushing companies to make deals, is leaving the board of Mondelez International Inc. as he prepares to become a director at Procter & Gamble Co. Peltz, 75, is being replaced by fellow Trian Fund Management partner Peter May, also 75. Debra Crew, 47, a U.S. military intelligence officer and former chief executive officer of the tobacco company Reynolds American, was also added to the board, Mondelez said in a statement on Tuesday. Peltz joined the board in 2014, less than two years after it was created in a split with Kraft Foods.