Berkshire Boosts Alphabet Stake 83% as Buffett Makes Major AI Bet

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Berkshire Boosts Alphabet Stake 83% as Buffett Makes Major AI Bet Khac Phu Nguyen Tue, August 18, 2026 at 5:00 PM EDT 1 min read BRK-B This article first appeared on GuruFocus . Berkshire Hathaway ( NYSE:BRK.A ) ( NYSE:BRK.B ), the insurance and investment giant built around disciplined capital allocation, moved approximately 0.8% higher to $502.46 Tuesday morning after investors digested one of Warren Buffett ( Trades , Portfolio )'s biggest technology bets yet. Berkshire expanded its Alphabet ( NASDAQ:GOOG ) position by 83%, pushing its stake to nearly 106 million shares worth about $37.8 billion by the end of June. Warning! GuruFocus has detected 6 Warning Signs with VVOS. Is BRK.A fairly valued? Test your thesis with our free DCF calculator. This was not just another portfolio adjustment. According to Reuters , Alphabet has become Berkshire's third-largest listed stock holding, behind only Apple and American Express. The company also flipped from years of caution into aggressive buying mode, purchasing $23.5 billion of equities during the second quarter while selling only $3.7 billion. Berkshire additionally spent roughly $4.5 billion buying back its own shares. The message is clear: Berkshire is no longer simply protecting its enormous cash pile it is putting capital behind businesses it believes can compound for years. The latest GF Value chart shows Berkshire trading at $502.31 versus a GF Value estimate of $550.36, leaving the stock approximately 8.7% below its estimated fair value. The bigger question for investors is whether Alphabet represents a one-off Buffett conviction move or the first major signal of how Greg Abel's Berkshire will deploy capital in the AI era.

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Berkshire Hathaway announced a massive 83% increase in its Alphabet stake, building a $37.8 billion position. This makes Alphabet Berkshire's third-largest equity holding, following Apple and American Express. The market views Warren Buffett's large-scale investment in AI and tech stocks as a significant turning point for future capital allocation.

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Berkshire Hathaway's shift to an aggressive investment stance by net purchasing $23.5 billion in stocks during the second quarter sends a strong signal across Big Tech and the AI ecosystem. In particular, increasing its stake in Alphabet to 106 million shares proves confidence in the long-term growth potential of a core company in the artificial intelligence era.

As a future scenario, Buffett's move could further stimulate institutional buying in AI-related mega-cap tech stocks, driving share price gains. Conversely, if macroeconomic uncertainty increases valuation pressure on tech stocks and heightens short-term volatility, quarterly 13F filings and AI sector performance metrics should be closely monitored.

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