Buffett has sung Cook's praise in the past, too. In his 2021 letter to Berkshire shareholders, he wrote, "Tim Cook, Apple's brilliant CEO, quite properly regards users of Apple products as his first love, but all of his other constituencies benefit from Tim's managerial touch as well."

Apple’s stock jumped 6% on Monday, adding roughly $180 billion to its market cap after the U.S. and China agreed to cut reciprocal tariffs from 125% to 10% for 90 days. President Trump said he spoke with CEO Tim Cook about boosting Apple’s U.

Apple previously said in February it would spend $500 billion to expand many of its operations in the U.S., including assembling AI servers in Houston.