| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Breaststroke | 1:06.91 | 2026 VIR SC Championships | 2026-01-30 |
| 100m Butterfly | 1:00.20 | COMOX-NRST-HST-SQUP Quad Meet Dual | 2025-11-15 |
| 100m Freestyle | 51.70 | 2026 BC Winter Provincial Championships | 2026-03-05 |
| 100m IM | 59.45 | Sharks IM Sprint Endurance Challenge | 2026-02-07 |
| 200m Backstroke | 2:11.82 | BC Winter Divisionals - Island & Coastal Vancouver | 2026-02-20 |
| 200m Breaststroke | 2:29.22 | 2026 VIR SC Championships | 2026-01-30 |
| 200m Butterfly | 2:12.52 | BC Winter Divisionals - Island & Coastal Vancouver | 2026-02-20 |
| 200m Freestyle | 1:57.27 | 2026 BC Winter Provincial Championships | 2026-03-05 |
| 200m IM | 2:08.46 | 2026 BC Winter Provincial Championships | 2026-03-05 |
| 400m Freestyle | 4:20.29 | 2025 NRST Ugly Sweater | 2025-12-12 |
| 400m IM | 4:46.64 | 2026 VIR SC Championships | 2026-01-30 |
| 50m Backstroke | 28.32 | BC Winter Divisionals - Island & Coastal Vancouver | 2026-02-20 |
| 50m Breaststroke | 29.90 | 2026 BC Winter Provincial Championships | 2026-03-05 |
| 50m Butterfly | 26.89 | 2026 BC Winter Provincial Championships | 2026-03-05 |
| 50m Freestyle | 23.30 | 2026 VIR SC Championships | 2026-01-30 |
Marfenko, Platon's top personal bests include 100m Breaststroke (1:06.91), 100m Butterfly (1:00.20), 100m Freestyle (51.70), 100m IM (59.45), 200m Backstroke (2:11.82).
Marfenko, Platon swims for Comox Valley Aquatic Club.
Marfenko, Platon has competed in 9 meets.