| Last Name Sort descending | First Name | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Adams | J. F. | 1966 | Moskva | Plenary |
| Agol | Ian | 2014 | Seoul | Plenary |
| Ahlfors | L.V. | 1978 | Helsinki | Plenary |
| Ahlfors | Lars V. | 1936 | Oslo | Plenary/Prize winner |
| Albert | A. A. | 1950 | Cambridge (USA) | Plenary |
| Aldous | David | 2010 | Hyderabad | Plenary |
| Alexander | J. W. | 1932 | Zurich | Plenary |
| Alexandrov | A. D. | 1958 | Edinburgh | Plenary |
| Alexandrov | P. S. | 1954 | Amsterdam | Plenary |
| Alon | Noga | 2002 | Beijing | Plenary |
| Ambrosio | Luigi | 2018 | Rio de Janeiro | Plenary |
| Amoroso | Luigi | 1928 | Bologna | Plenary |
| Anantharaman | Nalini | 2018 | Rio de Janeiro | Plenary |
| Arnold | D. | 2002 | Beijing | Plenary |
| Arnold | V. I. | 1974 | Vancouver | Plenary |
| Arnold | V. I. | 1983 | Warszawa | Plenary |
| Arora | Sanjeev | 2018 | Rio de Janeiro | Plenary |
| Arthur | James | 2014 | Seoul | Plenary |
| Artin | M. | 1966 | Moskva | Plenary |
| Atiyah | M. F. | 1966 | Moskva | Plenary/Prize winner |
| Avila | Artur | 2010 | Hyderabad | Plenary |
| Avila | Artur | 2014 | Seoul | Plenary/Prize winner |
| Babai | László | 1994 | Zurich | Plenary |
| Baker | A. | 1970 | Nice | Plenary/Prize winner |
| Balasubramanian | R | 2010 | Hyderabad | Plenary |