| AMASES |
| Armenian Mathematical Union |
| Austrian Mathematical Society |
| Bosnian Mathematical Society |
| Croatian Mathematical Society |
| Cyprus Mathematical Society |
| Edinburgh Mathematical Society |
| Estonian Mathematical Society |
| French Statistical Society |
| Georgian Mathematical Union |
| Greek Mathematical Society |
| Icelandic Mathematical Society |
| Irish Mathematical Society |
| Kosovar Mathematical Society (KMS) |
| Latvian Mathematical Society |
| Lithuanian Mathematical Society |
| Luxembourg Mathematical Society |
| Mathematical Society of Serbia |
| Romanian Mathematical Society |
| SIMAI |
| Slovak Mathematical Society |
| Slovenian Discrete and Applied Mathematics Society |
| Society of Mathematicians and Physicists of Montenegro |
| Spanish Society of Applied Mathematics |
| Spanish Society of Statistics and Operations Research |
| St. Petersburg Mathematical Society |
| The Society of Mathematicians, Physicists and Astronomers of Slovenia |
| Turkish Mathematical Society |
| Ukrainian Mathematical Society |
| Union of Bulgarian Mathematicians |