| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:36.00 | Delta March LMR | 2026-03-14 |
| 100m Breaststroke | 1:53.41 | Delta March LMR | 2026-03-14 |
| 100m Butterfly | 1:43.33 | Titans Fall Invitational | 2025-11-29 |
| 100m Freestyle | 1:25.26 | Delta March LMR | 2026-03-14 |
| 200m IM | 3:30.95 | Titans Fall Invitational | 2025-11-29 |
| 50m Backstroke | 47.09 | Titans Fall Invitational | 2025-11-29 |
| 50m Butterfly | 46.61 | Delta March LMR | 2026-03-14 |
| 50m Freestyle | 36.51 | Titans Fall Invitational | 2025-11-29 |
Nikonov, Ethan's top personal bests include 100m Backstroke (1:36.00), 100m Breaststroke (1:53.41), 100m Butterfly (1:43.33), 100m Freestyle (1:25.26), 200m IM (3:30.95).
Nikonov, Ethan swims for HYACK SWIM CLUB.
Nikonov, Ethan has competed in 2 meets.