Kohlberg Kravis Roberts has released its 4Q and full year 2010 results. The firm had a strong year, closing up 2010 with $61 billion of AUM, which represented a 16.8% increase from the end of 2009. Similarly, its economic net income was up 9.5% from 2009 at $2.1 billion for 2010. The increase was partially the result of the continued appreciation of KKR's PE portfolio, which grew by 33% during 2010. AUM in the firm's private markets segment ended the year at $46.2 billion.