| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| Noboru Takaishi | 1 | |
| Noel Odell | 1 | |
| Norman Hardie | 1 | |
| Odin Sanson | 1 | |
| Oliver Hill | 1 | |
| Oliver Kuang | 1 | |
| Olivia Ogier | 1 | |
| Ollie Dreghorn | 1 | |
| Omar Rose | 1 | |
| Owen Glynne Jones | 1 | |
| Øystein Andresen | 1 | |
| Øystein Krydsby Johnsen | 1 | |
| Paddy Buchan | 1 | |
| Pamela Shanti Pack | 1 | |
| Pat Kingsbury | 1 | |
| Patrick Kingsbury | 1 | |
| Patrik Aufdenblatten | 1 | |
| Paul Bennet | 1 | |
| Paul Bennett | 1 | |
| Paul Carruthers | 1 |