| Last Name | First Name | Year | City Sort descending | Section/Speaker Type |
|---|---|---|---|---|
| Shalom | Yehuda | 2006 | Madrid | Lie Groups and Lie Algebras |
| Shub | Michael | 2006 | Madrid | Ordinary Differential Equations and Dynamical Systems |
| Siegel | Alan | 2006 | Madrid | Mathematics Education and Popularization of Mathematics |
| Skinner | Christopher | 2006 | Madrid | Number Theory |
| Smirnov | Stanislav | 2006 | Madrid | Analysis |
| Smoktunowicz | Agata | 2006 | Madrid | Algebra |
| Soffer | Avraham | 2006 | Madrid | Mathematical Physics |
| Soudry | David | 2006 | Madrid | Lie Groups and Lie Algebras |
| Speh | Birgit | 2006 | Madrid | Lie Groups and Lie Algebras |
| Springer | T.A. | 2006 | Madrid | Lie Groups and Lie Algebras |
| Staffans | Olof | 2006 | Madrid | Control Theory and Optimization |
| Stanley | Richard P. | 2006 | Madrid | Plenary |
| Straube | Emil | 2006 | Madrid | Analysis |
| Suli | Endre | 2006 | Madrid | Numerical Analysis and Scientific Computing |
| Szabó | Zoltán | 2006 | Madrid | Topology |
| Szarek | Stanislaw | 2006 | Madrid | Operator Algebras and Functional Analysis |
| Szepessy | Anders | 2006 | Madrid | Applications of Mathematics in the Sciences |
| Tao | Terence | 2006 | Madrid | Plenary/Prize winner |
| Temlyakov | Vladimir | 2006 | Madrid | Analysis |
| Terasoma | Tomohide | 2006 | Madrid | Algebraic and Complex Geometry |
| Terng | Chuu-Lian | 2006 | Madrid | Geometry |
| Thomas | Robin | 2006 | Madrid | Combinatorics |
| Thomas | Simon | 2006 | Madrid | Logic and Foundations |
| Tolsa | Xavier | 2006 | Madrid | Analysis |
| Trevisan | Luca | 2006 | Madrid | Mathematical Aspects of Computer Science |