Ralf Huep and David Mussafer, executive committee co-chairmen, Advent International

Advent International underwent senior management changes in 1996 when founder Peter Brooke relinquished his role as chief executive. The firm is now supported by a stable of managing partners. Of these, Huep and Mussafer have been touted as future titans. A lawyer said of Mussafer: "I suspect he is groomed for greatness."