| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Freestyle | 2:00.98 | GHAC Winter Invitational SCM | 2026-03-06 |
| 25m Backstroke | 29.64 | GHAC Fall Invitational SCM | 2025-11-21 |
| 25m Breaststroke | 39.44 | GHAC Fall Invitational SCM | 2025-11-21 |
| 25m Butterfly | 34.51 | GHAC Fall Invitational SCM | 2025-11-21 |
| 50m Backstroke | 1:03.81 | GHAC Winter Invitational SCM | 2026-03-06 |
| 50m Breaststroke | 1:11.47 | GHAC Winter Invitational SCM | 2026-03-06 |
| 50m Freestyle | 53.52 | GHAC Winter Invitational SCM | 2026-03-06 |
Oldershaw, Margaret's top personal bests include 100m Freestyle (2:00.98), 25m Backstroke (29.64), 25m Breaststroke (39.44), 25m Butterfly (34.51), 50m Backstroke (1:03.81).
Oldershaw, Margaret swims for Golden Horseshoe Aquatic Club.
Oldershaw, Margaret has competed in 5 meets.