Niek Jansen
| Time | Date | Meet |
|---|---|---|
| 44.78 | 10-06-2023 | Netherlands Invitational Eindhoven |
| Time | Date | Meet |
|---|---|---|
| 40.05 | 20-09-2026 | Clubkampioenschappen 25m Breda |
| 43.52 | 30-12-2025 | 38e International Friendship Swimmeet |
| 40.61 | 06-04-2025 | Competitie deel 5 |
| 41.62 | 30-12-2024 | 37e International Friendship Swimmeet Maastricht |
| 43.75 | 28-01-2024 | KNZB Competitie #3 |
| 46.17 | 02-10-2022 | Comp 1 |
| 51.66 | 21-11-2021 | Competitie #2 |
| 57.29 | 12-01-2020 | Competitie wedstrijd |
| 1:02.02 | 10-02-2019 | Competitie deel 3 |