| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:37.51 | Fast Track into Fall 2025 | 2025-11-15 |
| 100m Breaststroke | 1:50.06 | Winter Festival | 2026-01-23 |
| 100m Butterfly | 1:28.54 | 2026 Edson Orcas Candy Crush Meet | 2026-02-28 |
| 100m Freestyle | 1:17.42 | 2026 Edson Orcas Candy Crush Meet | 2026-02-28 |
| 100m IM | 1:31.12 | Winter Festival | 2026-01-23 |
| 200m Freestyle | 2:50.86 | 2026 Edson Orcas Candy Crush Meet | 2026-02-28 |
| 200m IM | 3:16.27 | 2026 Edson Orcas Candy Crush Meet | 2026-02-28 |
| 400m Freestyle | 5:54.84 | Winter Festival | 2026-01-23 |
| 50m Backstroke | 44.86 | 2025 Edson Orcas Splash and Dash | 2025-11-22 |
| 50m Breaststroke | 51.69 | 2025 Edson Orcas Splash and Dash | 2025-11-22 |
| 50m Butterfly | 35.95 | 2026 Edson Orcas Candy Crush Meet | 2026-02-28 |
| 50m Freestyle | 34.68 | Otters 53rd Annual Mountain Meet | 2026-01-31 |
Beis, Athanasios's top personal bests include 100m Backstroke (1:37.51), 100m Breaststroke (1:50.06), 100m Butterfly (1:28.54), 100m Freestyle (1:17.42), 100m IM (1:31.12).
Beis, Athanasios swims for Grande Cache Otters.
Beis, Athanasios has competed in 7 meets.