| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:22.45 | 2026 Manta Grand Prix | 2026-02-20 |
| 100m Butterfly | 1:28.88 | Seals West Side Challenge | 2025-11-28 |
| 100m Freestyle | 1:12.09 | The Steve Molloy Invitational 2025 | 2025-11-07 |
| 100m IM | 1:23.87 | Bison Sprint IM Invitational | 2025-10-18 |
| 200m Backstroke | 2:56.32 | 2026 Manta Grand Prix | 2026-02-20 |
| 200m Freestyle | 2:37.26 | Seals West Side Challenge | 2025-11-28 |
| 200m IM | 2:57.38 | St. James Seals Invitational | 2026-01-23 |
| 400m Freestyle | 5:49.08 | The Steve Molloy Invitational 2025 | 2025-11-07 |
| 50m Backstroke | 38.78 | Seals West Side Challenge | 2025-11-28 |
| 50m Butterfly | 38.06 | St. James Seals Invitational | 2026-01-23 |
| 50m Freestyle | 34.02 | 2026 Manta Grand Prix | 2026-02-20 |
| 800m Freestyle | 11:38.97 | Seals West Side Challenge | 2025-11-28 |
Kassem, Mahmoud's top personal bests include 100m Backstroke (1:22.45), 100m Butterfly (1:28.88), 100m Freestyle (1:12.09), 100m IM (1:23.87), 200m Backstroke (2:56.32).
Kassem, Mahmoud swims for Alpha Swim Club.
Kassem, Mahmoud has competed in 5 meets.