The deal brings in Warren Buffett's diversified holding company as a major new investor, adding a high-profile endorsement of Alphabet's long-term AI and cloud strategy.

The deal builds on a stake Berkshire has steadily expanded since late 2025, making Alphabet one of its biggest recent bets.

Alphabet said it plans to sell $80 billion in stock, including through a $10 billion investment by Berkshire Hathaway.

By Tomi Kilgore and Emily Bary