Berkshire Hathaway Inc. lost $3.8 billion in Kraft Heinz stock.

Warren Buffett's Berkshire Hathaway company has taken a $3.8 billion impairment loss on its stake in its Kraft Heinz company, marking the latest blow to the performance of this billionaire's investment company in recent years. Documents submitted to regulatory agencies show that by the end of June, Berkshire Hathaway lowered the book value of its Kraft Heinz shares to $8.4 billion.