The speakers appear in a fixed format. There is the division along the lines of the A and B tracks of theoretical computer science, i.e., algorithms and complexity and semantics and logic. The other dividing line is between Dutch and foreign speakers.
| alg. + compl. | sem. en logica | |
| 1995 | ||
| Dutch: | Jan van Leeuwen | Jaco de Bakker |
| foreign: | C. Lengauer | Hoare |
| 1996 | ||
| Dutch: | Joost Kok | Henk Barendregt |
| foreign: | Emo Welzl | Wolfgang Thomas |
| 1997 | ||
| Dutch: | M.H. Overmars | N.G. de Bruijn |
| foreign: | T. B\"ack | K.G. Larsen |
| 1998 | ||
| Dutch: | E. Aarts | J.A. Bergstra |
| foreign: | A. Apostolico | M. Nielsen |
| 1999 | ||
| Dutch: | H. Burhman | F. Vaandrager |
| foreign: | I. Damgaard | G. Plotkin |
| 2000 | ||
| Dutch: | H. Te Riele | E. Brinksma |
| foreign: | S. Micali | A. Pnueli |
| 2001 | ||
| Dutch: | Arno Siebes | Krzysztof Apt |
| foreign: | Harel | Milner |
| 2002 | ||
| Dutch: | Lex Schrijver | Bart Jacobs |
| foreign: | Lane Hemaspaandra | Joe Halpern |
| 2003 | ||
| Dutch: | Peter Stevenhagen | Maarten de Rijke |
| foreign: | Lance Fortnow | Moshe Vardi |
| 2004 | ||
| Dutch: | Peter Gruenwald | Johan van Benthem |
| foreign: | Uwe Schoening | Samson Abramsky |
| 2005 | ||
| Dutch: | Arjen Lenstra | Frank van Harmelen |
| foreign: | Ronald Cramer | A. Rensink |
| 2006 | ||
| Dutch: | Mark de Berg | Wan Fokkink |
| foreign: | Kurt Mehlhorn | Martin Abadi |
| 2007 | ||
| Dutch: | Gerard Woeginger | Rineke Verbrugge |
| foreign: | Tom Ball | Nitin Saxena |
| 2008 | ||
| Dutch: | Ronald de Wolf | Marielle Stoelinga |
| foreign: | Christos Papadimitriou | Colin Stirling |
| 2009 | ||
| Dutch: | Paul Vitányi | Frank de Boer |
| foreign: | Guido Schaefer | E. Allen Emerson |
| 2010 | ||
| Dutch: | Monique Laurent | Jan Friso Groote |
| foreign: | Monika Henzinger | Georges Gonthier |
| 2011 | ||
| Dutch: | Jos Baeten | Hans Bodlaender |
| foreign: | S. Muthu Muthukrishnan | Tobias Nikpow |
| 2012 | ||
| Dutch: | Jan Rutten | Nelly Litvak |
| foreign: | Susanne Albers | Vincent Danos |
| 2013 | ||
| Dutch: | Wil van der Aalst | Mark van Kreveld |
| foreign: | Christel Baier | Barbara Terhal |