The top 15 is based on global revenue and is headed by Korn/Ferry. With a 2011 revenue of €568 million, this globally renowned headhunter with activities in 40 countries, tops the list. Egon Zehnder (€490 million, active in 39 countries) and Heidrick& Struggles (€403 million revenue, offices in 35 countries) complete the top three.