| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Mark Savage | 1 | |
| Mark Synnott | 1 | |
| Mark Turnbull | 1 | |
| Martina Čufar | 1 | References[1] http://onceuponaclimb.co.uk/portfolio-posts/martinacufarinterview-2-2/ |
| Martin Corbett | 1 | |
| Martin Crook | 1 | |
| Martin Moser | 1 | |
| Martin Scheel | 1 | |
| Martin Schidlowski | 1 | |
| Martin Švec | 1 | |
| Mary Varale | 1 | References[1] With Emilio Comici, 1930s https://www.facebook.com/climbing.in.the.80s/photos/a.270388289694020/3481547141911436/ |
| Masato Zushi | 1 | |
| Masoud Ghasemi | 1 | |
| Matej Sova | 1 | |
| Mathieu Ternant | 1 | |
| Matisse Almira-Colcombet | 1 | |
| Matt Bosley | 1 | |
| Matt Cox | 1 | |
| Matt Desantis | 1 | |
| Matteo Marobin | 1 |