| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:08.60 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 100m Backstroke | 1:07.48 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 100m Breaststroke | 1:33.52 | 2025 Central Region Div 1 LC Championships | 2025-06-20 |
| 100m Breaststroke | 1:26.78 | 2025 MSSAC Harvest Invitational | 2025-11-01 |
| 100m Butterfly | 1:13.31 | 2025 NYAC Cup | 2025-11-14 |
| 100m Freestyle | 1:02.77 | MAC Winter Invitational | 2026-01-22 |
| 100m Freestyle | 1:01.32 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m Backstroke | 2:28.11 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 200m Backstroke | 2:25.10 | 2025 NYAC Cup | 2025-11-14 |
| 200m Breaststroke | 3:18.13 | 2025 Central Region Div 1 LC Championships | 2025-06-20 |
| 200m Breaststroke | 3:10.56 | 2025 MSSAC Harvest Invitational | 2025-11-01 |
| 200m Butterfly | 2:44.28 | 2025 NYAC Cup | 2025-11-14 |
| 200m Freestyle | 2:15.55 | MAC Winter Invitational | 2026-01-22 |
| 200m Freestyle | 2:12.97 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m IM | 2:38.50 | MAC Winter Invitational | 2026-01-22 |
| 200m IM | 2:44.75 | MAC Fall Fest Invitational | 2025-10-18 |
| 400m Freestyle | 4:46.48 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 400m Freestyle | 4:39.52 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 400m IM | 5:42.65 | MAC Winter Invitational | 2026-01-22 |
| 400m IM | 5:26.67 | 2025 MSSAC Harvest Invitational | 2025-11-01 |
| 50m Backstroke | 31.49 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 50m Backstroke | 31.27 | 2025 NYAC Cup | 2025-11-14 |
| 50m Butterfly | 32.69 | MAC Winter Invitational | 2026-01-22 |
| 50m Butterfly | 31.32 | 2025 NYAC Cup | 2025-11-14 |
| 50m Freestyle | 30.31 | 2025 Age Group International LC | 2025-06-05 |
| 50m Freestyle | 28.79 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 800m Freestyle | 9:54.86 | 2026 Ontario Age Groups - MPAC | 2026-03-05 |
| 800m Freestyle | 9:34.84 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
Kromskoy, Matvey's top personal bests include 100m Backstroke (1:08.60), 100m Backstroke (1:07.48), 100m Breaststroke (1:33.52), 100m Breaststroke (1:26.78), 100m Butterfly (1:13.31).
Kromskoy, Matvey swims for Mississauga Aquatic Club.
Kromskoy, Matvey has competed in 8 meets.