This past May, Susan Buffett was the second largest holder of Berkshire shares behind her husband.

FORBES: Susan T. Buffett Dies From Stroke

Susan Thompson Buffett Susan Thompson Buffett , the 71-year-old wife of Warren Buffett Warren Buffett , the multi-billionaire investment genius, died suddenly of a stroke in Cody, Wyo.

FORBES: Susan T. Buffett Dies From Stroke

There is another billion dollar foundation in the name of wife number one, the Susan Thompson Buffett Foundation.

FORBES: Buffett On Taxes: Self-Interest And Cheap Virtue

Over the years Buffett has given moderate amounts of money to his three children, Susan, Howard and Peter.

FORBES: Susan T. Buffett Dies From Stroke

Susan Jacques, the chief executive of Borsheims, says she gets a single sheet of paper in January from Mr Buffett, telling her her goals for the year, and then she's allowed to get on with it.

BBC: Mr Buffett played the ukulele at this year's Berkshire AGM