| Last Name | First Name Sort descending | Year | City | Section/Speaker Type |
|---|---|---|---|---|
| Chamberlin | R.E. | 1950 | Cambridge (USA) | |
| Muirhead | R.F. | 1912 | Cambridge | Philosophy and History |
| Coats | R.H. | 1924 | Toronto | Statistics, Actuarial Science, Economics |
| Fowler | R.H. | 1924 | Toronto | Mechanics, Physics, Astronomy, Geophysics |
| Fox | R.H. | 1950 | Cambridge (USA) | Topology / Topological Groups |
| Duffin | R.J. | 1950 | Cambridge (USA) | Analysis |
| Wilder | R.L. | 1924 | Toronto | Algebra, Theory of Numbers, Analysis |
| Foster | R.M. | 1924 | Toronto | Engineering |
| Foster | R.M. | 1950 | Cambridge (USA) | |
| Brodie | R.R. | 1912 | Cambridge | Economics, Actuarial Science, Statistics |
| Angus | R.W. | 1924 | Toronto | Engineering |
| Bailey | R.W. | 1924 | Toronto | Engineering |
| Genese | R.W. | 1908 | Rome | Mechanics, Physical Mathematics, Astronomy |
| Ward | Rachel | 2022 | Virtual | Numerical Analysis and Scientific Computing |
| Badesco | Radu | 1932 | Zurich | Analysis |
| Badesco | Radu | 1936 | Oslo | Analysis |
| Cerf | Rafael | 2006 | Madrid | Probability and Statistics |
| de la Llave | Rafael | 2006 | Madrid | Ordinary Differential Equations and Dynamical Systems |
| Potrie | Rafael | 2018 | Rio de Janeiro | Dynamical Systems and Ordinary Differential Equations |
| Frisch | Ragnar | 1936 | Oslo | Probability Calculus, Mathematical Statistics, Insurance Mathematics, and Econometry |
| Pandharipande | Rahul | 2018 | Rio de Janeiro | Plenary |
| Bürger | Raimund | 2018 | Rio de Janeiro | Numerical Analysis and Scientific Computing, Mathematics in Science and Technology |
| Greenberg | Ralph | 2010 | Hyderabad | Number Theory |
| Phillips | Ralph | 1970 | Nice | Analysis |
| Parimala | Raman | 1994 | Zurich | Algebra |