The majority of Buffett's fortune is derived from his interest in Berkshire Hathaway, a publicly traded investment company. Berkshire has delivered a compounded annual gain in per share market value of 19.8% since 1965, according to its 2023 letter to shareholders. Buffett owns about 37.6% of the Class A shares and less than 0.001% of the Class B shares, according to company filings from November 2023.
The billionaire also owns a less than 1% stake in U.S. Bancorp, according to a November 2022 13G filing.
In a June 2024 news release, Buffett said Berkshire represents "roughly 99-and-a-half percent" of his net worth. Based on the value of his Berkshire shares on Feb. 25, 2012 -- the date of the letter -- the value of his non-Berkshire investments was calculated to be between $500 million and $900 million. In a separate letter to US Congressman Tim Huelskamp dated Oct. 11, 2011 Buffett said he had adjusted gross income of $62.9 million in 2010. Because Berkshire shares don't pay dividends, the income implies that the non-Berkshire assets were valued at about $500 million if he had investment returns of 13%.
A non-Berkshire stock portfolio of $533 million was calculated for 2010, consisting of $61 million in Wells Fargo stock he held directly at that time based on SEC filings and $472 million in cash representing undisclosed share holdings. The value of the cash figure has been adjusted since then based on market performance, dividends, share purchases and taxes.
Debbie Bosanek, Buffett's assistant, said he declined to comment.
