Caricatures of Warren Buffett, Berkshire Hathaway Inc. chairman and chief executive officer, and Charles Munger, vice chairman of Berkshire Hathaway Inc., appear on a sign advertising a special edition package of Heinz ketchup and mustard during the Berkshire Hathaway Inc. annual shareholders meeting in Omaha, Nebraska, on May 2, 2015. Warren Buffett helped take over H.J. Heinz in 2013 and facilitated its combination with Kraft Foods Group Inc. this year.