| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:38.70 | MAC Winter Invitational | 2026-01-22 |
| 100m Backstroke | 1:36.45 | MAC Jingle Bell | 2025-12-12 |
| 100m Breaststroke | 2:09.92 | MAC Winter Invitational | 2026-01-22 |
| 100m Breaststroke | 2:09.00 | MAC Jingle Bell | 2025-12-12 |
| 100m Butterfly | 1:57.84 | Pan Am Open 2026 | 2026-02-21 |
| 100m Freestyle | 1:25.34 | MAC Jingle Bell | 2025-12-12 |
| 100m IM | 1:41.67 | Pan Am Open 2026 | 2026-02-21 |
| 200m Backstroke | 3:26.83 | Pan Am Open 2026 | 2026-02-21 |
| 200m Freestyle | 3:10.35 | MAC Winter Invitational | 2026-01-22 |
| 200m Freestyle | 3:09.24 | MAC Jingle Bell | 2025-12-12 |
| 200m IM | 3:40.80 | MAC Winter Invitational | 2026-01-22 |
| 200m IM | 3:34.87 | MAC Jingle Bell | 2025-12-12 |
| 25m Backstroke | 22.78 | OSHAC Spring Fling | 2025-05-31 |
| 25m Breaststroke | 32.38 | OSHAC Spring Fling | 2025-05-31 |
| 25m Butterfly | 25.66 | OSHAC Spring Fling | 2025-05-31 |
| 25m Freestyle | 19.41 | OSHAC Spring Fling | 2025-05-31 |
| 50m Backstroke | 44.84 | MAC Winter Invitational | 2026-01-22 |
| 50m Backstroke | 44.74 | RHAC Fall Classic 2025 | 2025-10-24 |
| 50m Breaststroke | 1:00.84 | RHAC Fall Classic 2025 | 2025-10-24 |
| 50m Butterfly | 42.79 | Pan Am Open 2026 | 2026-02-21 |
| 50m Freestyle | 39.83 | MAC Winter Invitational | 2026-01-22 |
| 50m Freestyle | 38.11 | MAC Jingle Bell | 2025-12-12 |
MacMillan, Aubrey's top personal bests include 100m Backstroke (1:38.70), 100m Backstroke (1:36.45), 100m Breaststroke (2:09.92), 100m Breaststroke (2:09.00), 100m Butterfly (1:57.84).
MacMillan, Aubrey swims for CREST Swimming.
MacMillan, Aubrey has competed in 6 meets.