In the third quarter of 2025, Berkshire Hathaway acquired roughly 17.8 million shares of Alphabet, representing a multi-billion-dollar investment and positioning the holding as the 13th largest in Berkshire’s equity portfolio. Although Warren Buffett did not disclose the exact purchase date within the quarter, regulatory filings indicate the transaction was completed by September 30, 2025. This marks one of the largest single-stock additions to Berkshire’s portfolio since its Apple investment in 2016.

Following the investment, Alphabet shares accounted for approximately 2.8% of Berkshire Hathaway’s publicly disclosed equity holdings by market value. This allocation places Alphabet behind legacy positions in Apple, Bank of America and Coca-Cola, but ahead of long-standing stakes in Visa and Mastercard. The new position increased Berkshire’s aggregate technology exposure to nearly 15% of its equity book, up from 12% at the end of Q2 2025.

Berkshire’s decision reflects recognition of Alphabet’s entrenched network effects, double-digit revenue growth across search, advertising, cloud and subscriptions, and rapid user uptake of its AI Overview feature, now used by two billion monthly users in over 200 countries. In its Q2 2025 report, Alphabet delivered 12% year-over-year revenue growth in Search and YouTube advertising, and 15% growth in Google Cloud, underscoring the diversified moat that aligns with Berkshire’s long-term value investing mandate.

The addition of Alphabet diversifies Berkshire’s revenue exposure beyond financials, consumer staples and industrials, offering shareholders access to secular growth in digital advertising and cloud computing. Analysts estimate the new position could contribute $600 million to Berkshire’s annual dividend income, while potential share buybacks or dividend increases at Alphabet may further enhance total returns for long-term Berkshire shareholders.