Berkshire Hathaway invests 10% of its portfolio in Alphabet as AI bet takes shape

Warren Buffett spent decades avoiding technology companies. Now the firm he built is writing billion-dollar checks to one of the most capital-intensive AI businesses on the planet. Berkshire Hathaway has accumulated roughly 106 million shares of Alphabet Inc., the parent company of Google, with the position valued at approximately $36.6 to $37.8 billion as of June 30, 2026. That works out to about 10% of Berkshire’s equity portfolio, slotting Alphabet in as the firm’s third-largest holding behind Apple and American Express. Alphabet stock rose approximately 70% year-over-year through late 2025, driven by momentum in its Gemini AI models, accelerating Google Cloud revenue, and a massive build-out of computing infrastructure. How the position was built Berkshire began buying Alphabet shares on the open market starting in the third quarter of 2025, with those initial purchases valued at roughly $4 to $5.7 billion. The firm then made a far larger commitment in June 2026, participating in a $10 billion private placement as part of Alphabet’s broader $80 billion equity raise earmarked for AI infrastructure expansion. Buffett initiated the investment before stepping back from daily operat...