Kraft Heinz's top investor, Warren Buffett's Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B), also hasn't sold any shares after engineering Kraft's initial merger with Heinz. But during the conference call it warned that its full-year adjusted EBITDA would decline nearly 8%, due to divestments, supply chain cost and commodity inflation, aggressive competition, and currency headwinds. The bulls will point out that hiking prices to offset slower shipments worked for General Mills and PepsiCo, which both face similar challenges as Kraft Heinz.