| Years | Director General | Country | % Correct |
|---|---|---|---|
| 1989-1993 | Carlo Rubbia | Italy | 75%
|
| 2016- | Fabiola Gianotti | Italy | 75%
|
| 1994-1998 | Christopher Llewellyn Smith | UK | 50%
|
| 1999-2003 | Luciano Maiani | San Marino | 50%
|
| 2004-2008 | Robert Aymar | France | 50%
|
| 2009-2015 | Rolf-Dieter Heuer | Germany | 50%
|
| 1966-1970 | Bernard Gregory | France | 25%
|
| 1955-1960 | Cornelis Bakker | Netherlands | 25%
|
| 1952-1954 (Secretary-General) | Edoardo Amaldi | Italy | 25%
|
| 1954-1955 | Felix Bloch | Switzerland | 25%
|
| 1981-1988 | Hervig Schopper | Germany | 25%
|
| 1960-1961 (acting director), 1971-80 (co-director) | John Adams | UK | 25%
|
| 1976-1980 | Léon Van Hove | Belgium | 25%
|
| 1961-1965 | Viktor Frederik Weisskopf | Austria | 25%
|
| 1971-1975 (co-director) | Willibald Jentschke | Austria | 25%
|