| Time | Date | Name | Meet |
|---|---|---|---|
| 4:31.78 | March 15, 2024 | Kai Alldritt | 54th SNAG Senior Championships |
| 4:34.11 | March 19, 2023 | Kai Alldritt | 53rd SNAG Senior Championships |
| 4:34.73 | Jan. 14, 2023 | Kai Alldritt | Singapore Swim Series 1 |
| 4:36.74 | Nov. 25, 2022 | Kai Alldritt | Major Games Qualifier |
| 4:40.95 | June 25, 2022 | Kai Alldritt | 17th SNSC |
| 4:43.73 | Jan. 15, 2022 | Kai Alldritt | January Time Trials |
