| Last Name | First Name Sort descending | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Fujiwara | Koji | 2018 | Rio de Janeiro | Topology |
| Osterwalder | Konrad | 2006 | Madrid | Mathematics Education and Popularization of Mathematics |
| Ardakov | Konstantin | 2014 | Seoul | Lie Theory and Generalizations |
| Khanin | Konstantin | 2018 | Rio de Janeiro | Dynamical Systems and Ordinary Differential Equations, Mathematical Physics |
| Tikhomirov | Konstantin | 2022 | Virtual | Analysis, Combinatorics |
| Ramasubramanian | Krishnamurthi | 2022 | Virtual | History of Mathematics |
| Seip | Kristian | 1998 | Berlin | Analysis |
| Kuperberg | Krystyna | 1998 | Berlin | Ordinary Differential Equations & Dynamical Systems |
| Kurdyka | Krzysztof | 2018 | Rio de Janeiro | Algebraic and Complex Geometry |
| Chang | Kung-chiing | 1994 | Zurich | Part. Diff. Equations |
| Mahler | Kurt | 1932 | Zurich | Algebra and Number Theory |
| Strebel | Kurt | 1974 | Vancouver | Complex Analysis |
| Vogel | Kurt | 1936 | Oslo | Logic, Philosophy, and History |
| Hirsch | Kurt A. | 1936 | Oslo | Algebra and Number Theory |
| Saito | Kyoji | 1990 | Kyoto | Real & Complex Analysis |
| Popoff | Kyrille | 1932 | Zurich | Mechanics and Mathematical Physics |
| Ambrosio | L. | 2002 | Beijing | Part. Diff. Equations |
| Amoroso | L. | 1912 | Cambridge | Economics, Actuarial Science, Statistics |
| Autonne | L. | 1897 | Zurich | Analysis and Function Theory |
| Autonne | L. | 1904 | Heidelberg | Geometry |
| Autonne | L. | 1908 | Rome | Arithmetic, Algebra, Analysis |
| Bers | L. | 1958 | Edinburgh | Classical & Functional Analysis |
| Berwald | L. | 1928 | Bologna | Geometry |
| Bianchi | L. | 1908 | Rome | Geometry |
| Brouwer | L. | 1908 | Rome | Geometry |