| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Breaststroke | 1:12.84 | 2026 AUS Swimming Championships | 2026-02-13 |
| 100m Butterfly | 1:11.77 | Amby Legere Invitational | 2026-01-24 |
| 1500m Freestyle | 4:33.85 | Amby Legere Invitational | 2026-01-24 |
| 200m Backstroke | 2:31.79 | 2026 AUS Swimming Championships | 2026-02-13 |
| 200m Breaststroke | 2:43.47 | 2025 Kemp-Fry Invitational Swim Meet | 2025-11-28 |
| 200m IM | 2:25.89 | Amby Legere Invitational | 2026-01-24 |
| 400m IM | 5:19.95 | 2025 Kemp-Fry Invitational Swim Meet | 2025-11-28 |
| 50m Breaststroke | 32.47 | 2025 Kemp-Fry Invitational Swim Meet | 2025-11-28 |
| 50m Freestyle | 27.30 | 2025 AUS #2 Invitational | 2025-11-08 |
Johnstone, Angus's top personal bests include 100m Breaststroke (1:12.84), 100m Butterfly (1:11.77), 1500m Freestyle (4:33.85), 200m Backstroke (2:31.79), 200m Breaststroke (2:43.47).
Johnstone, Angus swims for Mount Allison University.
Johnstone, Angus has competed in 4 meets.