| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:05.18 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 100m Butterfly | 1:05.39 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 100m Freestyle | 58.98 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 100m IM | 1:12.21 | 2025 DAL Sprint Meet | 2025-10-19 |
| 200m Backstroke | 2:22.36 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 200m Breaststroke | 3:20.70 | Age Group Development #3 | 2025-11-22 |
| 200m Freestyle | 2:13.32 | 2025 Candy Cane Invitational | 2025-12-12 |
| 400m Freestyle | 4:55.48 | 2025 Candy Cane Invitational | 2025-12-12 |
| 400m IM | 5:37.80 | 2025 AGD Distance Central | 2025-11-01 |
| 50m Backstroke | 31.08 | 2025 NYAC Cup | 2025-11-14 |
| 50m Breaststroke | 41.62 | 2025 NYAC Cup | 2025-11-14 |
| 50m Butterfly | 29.59 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 50m Freestyle | 26.86 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 800m Freestyle | 10:15.30 | 2025 AGD Distance Central | 2025-11-01 |
Stewart, Margaret's top personal bests include 100m Backstroke (1:05.18), 100m Butterfly (1:05.39), 100m Freestyle (58.98), 100m IM (1:12.21), 200m Backstroke (2:22.36).
Stewart, Margaret swims for Halifax Trojan Aquatic Club.
Stewart, Margaret has competed in 13 meets.