Warren Buffett continued to sell Apple during the third quarter, but that wasn't his most surprising move -- not by a long shot.Warren Buffett is the CEO of the conglomerate Berkshire Hathaway (BRK.A 0.56%) (BRK.B 0.69%). Under his leadership, Berkshire stock has delivered a compound annual return of 19.8% since 1965, which would have been enough to turn an investment of $1,000 into a whopping $42 million.The same investment in the S&P 500 would have grown to just $308,115 over the same period, so it's no s ...