1970: Buffett becomes chairman and CEO of Berkshire.
1971: The Washington Post sells shares to the public, and Buffett begins buying.
Early 1970s: Buffett and Charlie Munger, who met in 1959, gain control of Blue Chip Stamps, a trading stamp company that accumulates cash for other investments.
1972: Buffett acquires See's Candy Shops for $25 million. He still cites it as the perfect company.
1972: Berkshire-owned Sun Newspapers of Omaha publishes a Pulitzer Prize-winning account of Boys Town's wealth.
1973: Berkshire has its annual meeting in Omaha for the first time, in National Indemnity Co.'s lunchroom.
1974: Washington Post Chairwoman Katharine Graham invites Buffett to join her board of directors. He serves until 2011.
1974: Buffett buys Wesco Financial, a savings and loan company. Munger handles its investments and, in 1984, becomes its chairman.
1976: Buffett invests in Geico, the auto insurer. Buffett buys the rest of the company in 1995.
1977: Through Blue Chip, Buffett buys the Buffalo Evening News of New York for $32.5 million.
1978: Munger joins Berkshire's board of directors as vice chairman.
1979: Buffett invests in ABC. In 1985, Capital Cities buys ABC, and Berkshire becomes its biggest shareholder.