Berkshire Hathaway, now led by Greg Abel, has concentrated roughly 28% to 30% of its $343 billion（約55兆円） portfolio in Apple and Alphabet, marking a significant shift toward technology stocks compared to the Warren Buffett era. Abel began building a position in Alphabet in late 2025 and participated in the company's $10 billion（約1.6兆円） private placement earlier this year as part of a broader $80 billion（約13兆円） capital raise. Alphabet's stock has roughly doubled since Berkshire's initial purchase, and this concentrated bet reflects Abel's comfort with large-cap technology companies driving the artificial intelligence transformation.
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Greg Abel, who recently took over as Berkshire Hathaway's chief executive, has concentrated roughly 28% to 30% of the company's $343 billion（約55兆円） investment portfolio in Apple and Alphabet. Berkshire first bought Alphabet shares in the third quarter of 2025, added more in the first quarter of 2026, and participated in a $10 billion（約1.6兆円） private placement as part of Alphabet's $80 billion（約13兆円） equity capital raise.
Why it matters
This signals a significant philosophical shift at Berkshire under Abel—he is far more comfortable than his predecessor in holding large stakes in big technology companies at the center of artificial intelligence. Alphabet's shares have roughly doubled over the past 12 months since Berkshire's initial purchase, suggesting Abel's early confidence in the company's AI-driven growth has been validated. For investors, this concentration in two stocks reflects a bet on how Apple and Alphabet will navigate an increasingly competitive AI landscape.
What to watch
The success of this strategy will depend on how both Apple and Alphabet perform in the capital-intensive artificial intelligence environment ahead. Alphabet's own $80 billion（約13兆円） equity raise underscores the scale of investment these companies are committing to AI development.
Greg Abel's takeover of Berkshire Hathaway marks a departure from the company's traditional cautious stance toward concentrated technology bets. Under Warren Buffett, Berkshire did hold Apple as a foundational position, but the scale and deliberateness of the current two-stock concentration—28% to 30% of a $343 billion（約55兆円） portfolio in just Apple and Alphabet—represents a material shift in investment philosophy. Abel signaled this shift early by beginning to build an Alphabet position in the third quarter of 2025, well before formally assuming the chief executive role, and then deepened that commitment by participating in Alphabet's massive $10 billion（約1.6兆円） private placement in the first quarter of 2026.
The timing and size of Alphabet's $80 billion（約13兆円） equity capital raise itself underscores why Abel appears confident in the company's trajectory. Alphabet is raising that capital explicitly to fund aggressive artificial intelligence ambitions, and Berkshire's choice to be a $10 billion（約1.6兆円） participant signals long-term strategic alignment with the company's direction. The fact that Alphabet's shares have roughly doubled in value over the past 12 months since Berkshire's initial purchase lends credibility to Abel's early conviction in the stock's AI-driven growth potential. Whether this concentrated bet delivers the returns Abel appears to expect will hinge on how both companies navigate an increasingly competitive and capital-intensive artificial intelligence landscape in the years ahead.
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