Buffett Converts 8,000 Class A Shares, Donates $5.9B in Class B Stock to Four Foundations
BRKB is trading near its 52-week low of $455.185 (7.3% above the low).
Summary
Warren Buffett converted 8,000 Class A shares into 12 million Class B shares and donated all 12 million Class B shares to four foundations, a transaction valued at roughly $5.9 billion. His voting power remains at 29.7%, but his economic interest drops to 13.2%.
Key Events · Ownership and Investor Activity · BRKB
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Class A to B Conversion
Buffett converted 8,000 Class A shares into 12,000,000 Class B shares on July 14, 2026, a standard 1:1,500 conversion ratio.
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$5.9 Billion Charitable Donation
All 12 million Class B shares were donated: 9 million to the Susan Thompson Buffett Foundation and 1 million each to the Sherwood Foundation, Howard G. Buffett Foundation, and NoVo Foundation. At $488.60/share, the total donation value is approximately $5.86 billion.
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Voting Power vs. Economic Interest
Post-transaction, Buffett holds 38.2% of Class A shares, giving him 29.7% aggregate voting power, but his economic interest falls to 13.2% of total outstanding shares.
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Annual Philanthropic Pattern
This donation aligns with Buffett's long-standing annual giving plan, gradually transferring wealth while retaining voting control through concentrated Class A holdings.
Analysis · BRKB · Finance
Warren Buffett converted 8,000 Class A shares into 12 million Class B shares and immediately donated 12 million Class B shares — worth approximately $5.9 billion at current prices — to four foundations, including the Susan Thompson Buffett Foundation. This is a significant annual philanthropic event that reduces his economic interest to 13.2% while maintaining 29.7% voting control. The conversion and donation are part of his long-standing pledge to give away his fortune, but the sheer dollar magnitude makes this a notable event for Berkshire shareholders, as it incrementally shifts the ownership structure without altering his voting grip.
How filings like this one have moved
In the 30 days to Oct 3, 2026, 36.7% of the 1072 measured filings Wiseek scored 8 moved their stock by 5% or more by the next session's close. The median move was -0.61%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, BRKB was trading at $488.60 on NYSE in the Finance sector, with a market capitalization of approximately $1.1T. The 52-week trading range was $455.19 to $516.85. This filing was assessed with neutral market sentiment and an importance score of 8 out of 10.