Warren Buffett at a glance

"Buffett, 79, bought Berkshire, a struggling textile mill, in 1965. The mill is gone, but Berkshire's market value is roughly $189 billion, Reuters data show. Berkshire owns roughly 80 companies.

It ended last year with $59 billion of stock investments in companies such as American Express, Coca-Cola, Procter & Gamble and Wells Fargo."

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