As of January 2, 2018, Warren Buffett won that bet. His S&P 500 index fund compounded 7.1% annual gain over 10 years beating an average increase of 2.2% by the basket of funds selected by Protégé Partners. The bet was actually worth 2.22 million at the end, because they moved the bet of 1 million into Berkshire class B shares in 2012.