| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:24.86 | Edmonton Open 2026 | 2026-01-30 |
| 100m Backstroke | 1:23.21 | Mies Schootman Invitational 2026 | 2026-01-16 |
| 100m Breaststroke | 1:27.90 | Edmonton Open 2026 | 2026-01-30 |
| 100m Breaststroke | 1:23.96 | Mies Schootman Invitational 2026 | 2026-01-16 |
| 100m Butterfly | 1:21.19 | Edmonton Open 2026 | 2026-01-30 |
| 100m Butterfly | 1:10.82 | BC Winter Divisionals - Island & Coastal Vancouver | 2026-02-20 |
| 100m Freestyle | 1:12.38 | ManSask Provincial Championships | 2025-07-10 |
| 100m Freestyle | 1:09.29 | 2025 NRST Ugly Sweater | 2025-12-12 |
| 200m Backstroke | 2:54.42 | Mies Schootman Invitational 2026 | 2026-01-16 |
| 200m Breaststroke | 3:16.33 | Edmonton Open 2026 | 2026-01-30 |
| 200m Breaststroke | 3:14.93 | Mies Schootman Invitational 2026 | 2026-01-16 |
| 200m Butterfly | 3:02.86 | 2025 NRST Ugly Sweater | 2025-12-12 |
| 200m Freestyle | 2:33.29 | Mies Schootman Invitational 2026 | 2026-01-16 |
| 200m IM | 2:59.98 | ManSask Provincial Championships | 2025-07-10 |
| 200m IM | 2:47.69 | BC Winter Divisionals - Island & Coastal Vancouver | 2026-02-20 |
| 400m IM | 6:01.56 | 2025 NRST Ugly Sweater | 2025-12-12 |
| 50m Backstroke | 37.03 | Edmonton Open 2026 | 2026-01-30 |
| 50m Backstroke | 39.21 | OS Annual Short Course Invitational Swim Meet | 2025-10-31 |
| 50m Breaststroke | 40.62 | Edmonton Open 2026 | 2026-01-30 |
| 50m Breaststroke | 38.31 | BC Winter Divisionals - Island & Coastal Vancouver | 2026-02-20 |
| 50m Butterfly | 32.42 | Edmonton Open 2026 | 2026-01-30 |
| 50m Butterfly | 31.98 | BC Winter Divisionals - Island & Coastal Vancouver | 2026-02-20 |
| 50m Freestyle | 31.18 | Edmonton Open 2026 | 2026-01-30 |
| 50m Freestyle | 29.84 | BC Winter Divisionals - Island & Coastal Vancouver | 2026-02-20 |
| 800m Freestyle | 11:22.76 | Delta Distance LMR | 2025-11-30 |
Cotnam, Karis's top personal bests include 100m Backstroke (1:24.86), 100m Backstroke (1:23.21), 100m Breaststroke (1:27.90), 100m Breaststroke (1:23.96), 100m Butterfly (1:21.19).
Cotnam, Karis swims for Squamish Pirates Swim Club.
Cotnam, Karis has competed in 11 meets.