The partnership years (1957-1968) -- 1958: Sanborn Map Company -- 1961: Dempster Mill Manufacturing Company -- 1964: Texas National Petroleum Company -- 1964: American Express -- 1965: Berkshire Hathaway -- The middle years (1968-1990) -- 1967: National Indemnity Company-- 1972: See's Candies -- 1973: Washington Post -- 1976: Geico (Government Employees Insurance Company) -- 1977: The Buffalo Evening News -- 1983: Nebraska Furniture Mart -- 1985: Capital Cities/ABC -- 1987: Salomon Inc. : preferred stock investments -- 1988: Coca-Cola -- The late years (1990-2014) -- 1989: US Air Group -- 1990: Wells Fargo -- 1998: General Re -- 1999: MidAmerican Energy Holdings Company -- 2007-2009: Burlington Northern -- 2011: IBM -- Lessons learned -- Evolution of Buffett's investment strategy -- What we can learn from Buffett.