| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2024/2025 | AaB | Superliga | 0 | 0 | 0 | 0 | 0 | – |
| 2023/2024 | AaB | 1. Division | 22 | 1 | 0 | 4 | 0 | – |
| 2022/2023 | AaB | Superliga | 23 | 0 | 1 | 5 | 0 | 6.8 |
| 2021/2022 | AaB | Superliga | 30 | 1 | 1 | 6 | 0 | 6.7 |
| 2020/2021 | AaB | Superliga | 29 | 3 | 2 | 8 | 0 | 7.0 |
| 2019/2020 | AaB | Superliga | 28 | 0 | 2 | 8 | 0 | 7.0 |
| 2018/2019 | AaB | Superliga | 25 | 0 | 0 | 5 | 0 | – |
| 2017/2018 | AaB | Superliga | 28 | 1 | 0 | 10 | 0 | – |
| 2016/2017 | AaB | Superliga | 24 | 0 | 0 | 10 | 0 | – |
| 2015/2016 | AaB | Superliga | 12 | 0 | 0 | 3 | 0 | – |
| 2014/2015 | AaB | Superliga | 2 | 0 | 0 | 0 | 0 | – |
| 2013/2014 | AaB | Superliga | 29 | 2 | 0 | 9 | 0 | – |
| 2012/2013 | AaB | Superliga | 29 | 0 | 0 | 5 | 0 | – |
| 2011/2012 | AaB | Superliga | 17 | 0 | 0 | 2 | 0 | – |
| 2010/2011 | AaB | Superliga | 0 | 0 | 0 | 0 | 0 | – |
| 2009/2010 | AaB | Superliga | 1 | 0 | 0 | 0 | 0 | – |
| Total | 299 | 8 | 6 | 75 | 0 | – | ||
J. Ahlmann career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.