Buffett hasn’t been known to invest in the latest hot technologies, but you still can apply his techniques to tech investing. Warren Buffett, as chairman, has helped Berkshire Hathaway’s portfolio grow to more than $258 billion — and it’s even beaten the S&P 500 index along the way. Berkshire Hathway has delivered a compounded annual gain of more than 19% over 59 years, while the benchmark has registered a 10% gain over that time period.