The write-down of Berkshire Hathaway's 27.4% stake in Kraft Heinz, its second for the company, reflects a significant decline in the value of the investment. Berkshire had taken a $3 billion write-down in Kraft Heinz in 2019.

According to a regulatory filing late Monday, Berkshire Hathaway sold approximately 1.64 million shares of DaVita Inc. on July 31, at an average price of $140.61 per share, totaling around $230 million,