Buffett also allowed Berkshire's cash stake to rise to a record $137.3 billion from $128 billion at the end of 2019.
That reflected the 89-year-old billionaire's inability to make large, "elephant" size acquisitions, now in its fifth year, and caution in buying more stocks. Berkshire repurchased $1.7 billion of its own stock.
Berkshire's first-quarter net loss totaled $49.75 billion, or $30,653 per Class A share, reflecting $54.52 billion of losses from investments, mainly common stocks. A year earlier, net earnings totaled $21.66 billion, or $13,209 per share.
An accounting rule requires Berkshire to report unrealized stock losses and gains with earnings. This causes huge swings in Berkshire's net results that Buffett considers meaningless.