The Oracle of Omaha continues to build a sizable position in one of Wall Street's few legal monopolies.

For the better part of six decades, Berkshire Hathaway ( BRK.A 0.70% ) ( BRK.B 0.70% ) CEO Warren Buffett has been crushing Wall Street's benchmark index, the S&P 500 , in the return column. As of midday on Sept. 26, he'd overseen a return for his company's Class A shares (BRK.A) that exceeds 6,080,000% on a cumulative basis over 60 years, which is about 137 times greater than the total return, including dividends, of the S&P 500 over the same timeline.

Delivering a nearly 20% annualized return has earned the Oracle of Omaha an extensive following. Some investors even choose to ride his coattails and mirror his trading activity. This can be done thanks to quarterly For

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