| Last Name Sort ascending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Anderson | R. D. | 1970 | Nice | Geometry & Topology |
| Andersen | Henning Hahr | 1994 | Zurich | Lie Groups |
| Anantharaman | Nalini | 2018 | Rio de Janeiro | Plenary |
| Amsler | M. | 1920 | Strasbourg | Arithmetic, Algebra, Analysis |
| Amoroso | L. | 1912 | Cambridge | Economics, Actuarial Science, Statistics |
| Amoroso | Luigi | 1928 | Bologna | Plenary |
| Amoroso | Luigi | 1932 | Zurich | Probability calculus, insurance mathematics, and statistics |
| Amodeo | F. | 1908 | Rome | Philosophy, History, and Didactics |
| Amodeo | Federico | 1900 | Paris | Geometry |
| Amitsur | S. A. | 1970 | Nice | Algebra |
| Ambrosio | L. | 2002 | Beijing | Part. Diff. Equations |
| Ambrosio | Luigi | 2018 | Rio de Janeiro | Plenary |
| Ambrosetti | A. | 1983 | Warszawa | Part. Diff. Equations |
| Ambartzumian | R. V. | 1974 | Vancouver | Probability & Mathematical Statistics, Potential, Measure & Integration |
| Ambainis | Andris | 2018 | Rio de Janeiro | Mathematical Aspects of Computer Science |
| Alt | Frans | 1932 | Zurich | Geometry |
| Alt | Franz | 1936 | Oslo | Probability Calculus, Mathematical Statistics, Insurance Mathematics, and Econometry |
| Alt | H. W. | 1986 | Berkeley | Partial Differential Equations and Dynamic Systems |
| Alon | Noga | 1990 | Kyoto | Combinatorics |
| Alon | Noga | 2002 | Beijing | Plenary |
| Almgren, Jr. | F. J. | 1978 | Helsinki | Part. Diff. Equations |
| Almgren | F. J. | 1970 | Nice | Analysis |
| Allard | William K. | 1974 | Vancouver | Partial Differential Equations |
| Alexeyev | V. M. | 1970 | Nice | Analysis |
| Alexeev | Valery | 2006 | Madrid | Algebraic and Complex Geometry |