1 Carlyle group Washington 325
2 KKR investment company new york 3 1 1
3 Goldman Sachs new york 3 10
4 new york Blackstone Group 284
5 Newbridge Capital (TPG) No.235 Fort Worth
6 Permira Investment Group London 2 15
7 Apax partners London 189
8 Bain Capital Boston 173
9 Reserve Equity Partner Rhode Island 164
10 CVC capital partner London 157