Berkshire Hathaway said on Tuesday it has shed its holdings in General Motors and Procter & Gamble, and trimmed its stake in Amazon.com, as the conglomerate controlled by billionaire Warren Buffett boosted its cash pile to a record $157.2 billion.

In a regulatory filing detailing its U.S.-listed stock holdings as of Sept. 30, Berkshire reported no holdings in GM and P&G, after reporting stakes of $848 million and $48 million in June, and said it reduced its stake in Amazon by 5%.

Berkshire also appeared to have shed what had been a $621 million stake in Celanese, a specialty materials company.