| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:29.90 | UCSC Spring Start-up | 2026-04-25 |
| 100m Backstroke | 1:32.33 | UCSC Fall Start Up | 2025-10-18 |
| 100m Breaststroke | 1:33.97 | UCSC Grand Prix | 2026-01-30 |
| 100m Butterfly | 1:44.11 | UCSC Fall Back Invitational | 2025-11-07 |
| 100m Freestyle | 1:14.90 | UCSC Spring Start-up | 2026-04-25 |
| 100m Freestyle | 1:19.17 | UCSC Fall Start Up | 2025-10-18 |
| 100m IM | 1:28.48 | UCSC Holiday Classic | 2025-12-13 |
| 200m Breaststroke | 3:25.45 | UCSC Grand Prix | 2026-01-30 |
| 200m Butterfly | 3:42.59 | UCSC Grand Prix | 2026-01-30 |
| 200m Freestyle | 2:41.08 | UCSC Holiday Classic | 2025-12-13 |
| 200m IM | 3:07.46 | UCSC Spring Start-up | 2026-04-25 |
| 200m IM | 3:12.52 | UCSC Grand Prix | 2026-01-30 |
| 400m Freestyle | 5:43.86 | UCSC Holiday Classic | 2025-12-13 |
| 50m Backstroke | 44.34 | UCSC TC1-Special | 2025-10-17 |
| 50m Breaststroke | 44.12 | UCSC Spring Start-up | 2026-04-25 |
| 50m Breaststroke | 43.35 | UCSC Holiday Classic | 2025-12-13 |
| 50m Butterfly | 42.47 | UCSC Spring Start-up | 2026-04-25 |
| 50m Butterfly | 44.48 | UCSC Fall Back Invitational | 2025-11-07 |
| 50m Freestyle | 34.66 | UCSC Spring Start-up | 2026-04-25 |
| 50m Freestyle | 35.17 | UCSC Grand Prix | 2026-01-30 |
Sieben, Fiona's top personal bests include 100m Backstroke (1:29.90), 100m Backstroke (1:32.33), 100m Breaststroke (1:33.97), 100m Butterfly (1:44.11), 100m Freestyle (1:14.90).
Sieben, Fiona swims for Calgary Swimming.
Sieben, Fiona has competed in 7 meets.