Henry Southern has 5 recorded races.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| BMW Berlin Marathon 2025 | Marathon | 3:57:44 | 12818 | |
| TCS London Marathon 2025 | Marathon | 5:59:06 | 49296 | |
| TCS London Marathon 2024 | Marathon | 4:29:27 | 30224 | |
| TCS London Marathon 2023 | Marathon | 4:29:35 | 27212 | |
| TCS London Marathon 2022 | Marathon | 3:41:39 | 8010 |