| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:11.62 | 2026 AAA #1 LC Invitational | 2026-01-30 |
| 100m Backstroke | 1:05.18 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 100m Breaststroke | 1:33.93 | 2026 HTAC Time Trial #1 | 2026-04-11 |
| 100m Butterfly | 1:08.70 | AAA/AA #5 LCM Invitational Swim Meet | 2026-04-25 |
| 100m Butterfly | 1:05.39 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 100m Freestyle | 1:03.27 | 2025 Canada Games | 2025-08-10 |
| 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 | 2:35.50 | AAA/AA #5 LCM Invitational Swim Meet | 2026-04-25 |
| 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 Butterfly | 2:44.24 | AAA/AA #5 LCM Invitational Swim Meet | 2026-04-25 |
| 200m Freestyle | 2:19.95 | East Coast Championships | 2025-07-10 |
| 200m Freestyle | 2:13.32 | 2025 Candy Cane Invitational | 2025-12-12 |
| 200m IM | 2:38.58 | 2026 AAA #1 LC Invitational | 2026-01-30 |
| 400m Freestyle | 4:59.79 | 2026 AAA #2 LC Invitational | 2026-02-21 |
| 400m Freestyle | 4:55.48 | 2025 Candy Cane Invitational | 2025-12-12 |
| 400m IM | 5:31.91 | 2026 AAA #2 LC Invitational | 2026-02-21 |
| 400m IM | 5:37.80 | 2025 AGD Distance Central | 2025-11-01 |
| 50m Backstroke | 32.86 | AAA/AA #5 LCM Invitational Swim Meet | 2026-04-25 |
| 50m Backstroke | 31.08 | 2025 NYAC Cup | 2025-11-14 |
| 50m Breaststroke | 41.62 | 2025 NYAC Cup | 2025-11-14 |
| 50m Butterfly | 30.77 | East Coast Championships | 2025-07-10 |
| 50m Butterfly | 29.59 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 50m Freestyle | 28.39 | 2025 Canada Games | 2025-08-10 |
| 50m Freestyle | 26.86 | 2026 AA & AAA Winter Champs | 2026-03-05 |
| 800m Freestyle | 10:39.30 | AAA/AA #5 LCM Invitational Swim Meet | 2026-04-25 |
| 800m Freestyle | 10:15.30 | 2025 AGD Distance Central | 2025-11-01 |
Stewart, Margaret's top personal bests include 100m Backstroke (1:11.62), 100m Backstroke (1:05.18), 100m Breaststroke (1:33.93), 100m Butterfly (1:08.70), 100m Butterfly (1:05.39).
Stewart, Margaret swims for Halifax Trojan Aquatic Club.
Stewart, Margaret has competed in 15 meets.