Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) CEO Warren Buffett has quite the following on Wall Street, and it's not hard to understand why. Buffett's long-term investing approach and his ability to pick out businesses that offer plain-as-day competitive advantages has allowed Berkshire Hathaway's stock to run circles around the benchmark S&P 500 over the last 55 years. Investors might harp about Buffett's subpar returns over the past decade relative to the S&P 500, but his company's stock has delivered a 2,744,062% return to shareholders over the past 55 years and created over $400 billion in market value in the process.