| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:36.38 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 100m Backstroke | 1:37.62 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Breaststroke | 1:51.42 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 100m Breaststroke | 1:51.66 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Butterfly | 1:55.29 | 2025 Alex Baumann Invitational | 2025-11-21 |
| 100m Freestyle | 1:27.82 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 100m Freestyle | 1:23.01 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m IM | 1:45.67 | RHAC Fall Classic 2025 | 2025-10-24 |
| 200m Backstroke | 3:24.02 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 200m Backstroke | 3:20.69 | 2025 MSSAC Open | 2025-12-19 |
| 200m Freestyle | 3:11.09 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 200m Freestyle | 3:11.91 | 2025 Alan Swanston Classic | 2025-12-05 |
| 200m IM | 3:34.45 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 200m IM | 3:35.43 | 2025 Alex Baumann Invitational | 2025-11-21 |
| 400m Freestyle | 6:44.05 | 2025 MSSAC Open | 2025-12-19 |
| 50m Backstroke | 42.75 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Breaststroke | 52.60 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 50m Breaststroke | 49.81 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Butterfly | 44.76 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 50m Butterfly | 47.42 | 2025 Alex Baumann Invitational | 2025-11-21 |
| 50m Freestyle | 36.23 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 50m Freestyle | 36.30 | 2025 Alan Swanston Classic | 2025-12-05 |
Shimonov, Johnny's top personal bests include 100m Backstroke (1:36.38), 100m Backstroke (1:37.62), 100m Breaststroke (1:51.42), 100m Breaststroke (1:51.66), 100m Butterfly (1:55.29).
Shimonov, Johnny swims for Aurora Ducks Swimming Club.
Shimonov, Johnny has competed in 11 meets.