Some of the best investments made by billionaire Warren Buffett include National Indemnity and National Fire & Marine, American Express, Coca-Cola, Bank of America, Apple, BYD, See's Candy and Berkshire Hathaway Energy. Meanwhile, Buffett said that his worst investment was in Berkshire Hathaway textile mills. Dexter Shoe and Blue Chip Stamps are also considered among Buffett's worst investments.