Mr Buffett, who founded Berkshire Hathaway and is one of the world's most listened-to financial savers, has increased the assets he manages at a rate of 21.1 per cent a year over four decades of investing.
In recent times, he has continued acquiring firms despite the credit crunch - looking to continental Europe and especially family-owned firms in Germany for new opportunities.
The so-called Sage of Omaha also dropped a big hint of a star future buy at the annual meeting of Berkshire Hathaway in May.
"I could find better things to do with a million dollars - probably in Korea - than I could probably find in this market (the US)," he commented.
Mr Buffett's personal wealth - the bulk of which is pledged to charity after his death - currently stands at around Â£62 billion, according to Forbes magazine.