Kraft Heinz (KHC) is currently trading below Berkshire Hathaway’s (BRK-A, BRK-B) cost basis.

Berkshire Hathaway owns 26.7%, or 325,442,152 shares, of Kraft Heinz and in 2015 purchased its stake with a cost basis of $9.8 billion, or $30.11 per share. At its current price of $28.60, Berkshire’s stake is valued at $9.3 billion, representing an unrealized loss of $500 million.

In 2017, at the peak price of $90 per share, Berkshire’s stake was worth $29.3 billion. Thus, the value of Berkshire’s stake has been reduced by $20 billion, or 68%, over the past two years.