Warren Buffett said Wednesday he was the driving force behind Berkshire Hathaway's big investment in Alphabet.

"I initiated it," Buffett said in an interview with CNBC's Becky Quick.

Berkshire first disclosed a stake in Alphabet during the third quarter of 2025 and has dramatically increased its investment since. Last month, the conglomerate invested an additional $10 billion through a private stock purchase.

Buffett, who stepped down as Berkshire's chief executive earlier this year but remains chairman, said he and CEO Greg Abel continue to work closely together on investment decisions.

"I am not doing anything that he doesn't approve of. He's not doing anything I don't approve of," Buffett said. "We talk all the time, but he is the decider."

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