Berkshire Hathaway reveals 66% of equity portfolio concentrated in just five stocks

Berkshire Hathaway’s equity portfolio reads less like a diversified investment fund and more like a poker player who found five hands worth going all-in on. As of June 30, roughly 66% of the conglomerate’s US equity holdings sit in just five companies: American Express, Apple, Bank of America, Alphabet, and Coca-Cola.

For a portfolio valued at approximately $263 billion as of the end of Q1, that level of concentration means well over $150 billion rides on the fortunes of a handful of corporate giants.

The big five, broken down

Apple remains the single largest position, representing roughly 22% of the portfolio at an estimated $58 billion as of March 31. American Express comes in second at about 17%, worth approximately $46 billion. Coca-Cola holds steady at around 12%, or $30 billion. Bank of America rounds out the legacy positions at roughly 10%, valued near $25 billion.

The newest entrant to the top-five club is Alphabet. On June 1, Berkshire agreed to a $10 billion private placement investment in Google’s parent company. Combined with prior purchases, the total valuation of Berkshire’s Alphabet stake now exceeds $30 billion. Buffett himself confirmed he personally initiated the Alphabet investment, which was subsequently approved by incoming CEO Greg Abel.

Concentration as strategy, not accident

This isn’t new behavior for Berkshire. The portfolio has historically held between 66% and 71% of its value in the top five holdings across multiple quarters. The total portfolio spans roughly 24 to 29 positions, depending on the quarter.

Buffett has long preached the gospel of concentrated investing. His famous line about diversification being “protection against ignorance” encapsulates the philosophy: if you understand a business deeply, spreading your capital across dozens of positions only dilutes your best ideas.

The Alphabet bet and what it signals

With Alphabet, Buffett went out of his way to clarify that the investment was his call. A $10 billion private placement, followed by additional open-market purchases that pushed the total position past $30 billion, makes this one of the largest technology bets in Berkshire’s history outside of Apple.

Greg Abel is set to take over as CEO, and Buffett’s willingness to make a major new investment while simultaneously endorsing Abel’s approval process suggests continuity rather than disruption.

As of August 8, no Q2 2026 13F filing had been submitted, but the expectation is that the 66% concentration figure holds steady following the Alphabet transaction. The 13F, which is required for institutional investors managing more than $100 million, will provide the official breakdown when it’s filed.

Opportunity and exposure in equal measure

The downside of concentration is straightforward. When two-thirds of your portfolio depends on five companies, a stumble by any one of them hits harder than it would in a more diversified book. Apple alone moving 10% in either direction shifts Berkshire’s equity portfolio by roughly $6 billion.

The $10 billion Alphabet deal is a notable example of Berkshire’s ability to negotiate private placements that most investors simply can’t access.

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