| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:23.63 | KBM Heats & Finals | 2026-02-20 |
| 100m Breaststroke | 1:52.55 | Beast Cup 2026 | 2026-01-10 |
| 100m Butterfly | 1:34.79 | KBM Heats & Finals | 2026-02-20 |
| 100m Freestyle | 1:17.88 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
| 100m IM | 1:35.07 | KBM Pentathlon | 2025-10-19 |
| 200m Backstroke | 3:01.89 | KBM Heats & Finals | 2026-02-20 |
| 200m Freestyle | 2:53.24 | Beast Cup 2026 | 2026-01-10 |
| 200m IM | 3:22.75 | KBM Distance & Development | 2025-11-08 |
| 400m Freestyle | 6:01.56 | KBM Heats & Finals | 2026-02-20 |
| 400m IM | 7:09.07 | KBM Distance & Development | 2025-11-08 |
| 50m Backstroke | 38.61 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
| 50m Breaststroke | 49.30 | KBM Heats & Finals | 2026-02-20 |
| 50m Butterfly | 41.70 | SCAR Cindy Nicholas Memorial Meet | 2025-11-01 |
| 50m Freestyle | 34.00 | 2026 Eastern Ontario Regional Championship - Winte | 2026-01-30 |
| 800m Freestyle | 13:20.45 | BBST Fall Invitational 2025 | 2025-11-21 |
Maraldi, Nathan's top personal bests include 100m Backstroke (1:23.63), 100m Breaststroke (1:52.55), 100m Butterfly (1:34.79), 100m Freestyle (1:17.88), 100m IM (1:35.07).
Maraldi, Nathan swims for Ernestown Barracuda Swim Club.
Maraldi, Nathan has competed in 11 meets.