| Name ▲ | Age | Gender | Owner | Actions |
|---|
| Witch's Brew | 6 | Mare | AllegroThoroughbreds | |
| Witch's Cat | 14 | Stallion | Final Furlong | |
| Witcher | 9 | Gelding | Vimes Racing | |
| WitchfinderGeneral | 13 | Stallion | Rainee Thoroughbreds | |
| With Anger | 21 | Stallion | Final Furlong | |
| With Gusto | 10 | Stallion | Dreadnought | |
| With Horns | 15 | Gelding | Final Furlong | |
| Within Reach | 11 | Gelding | Stillwater Farms | |
| Without A Doubt | 17 | Stallion | Final Furlong | |
| Without Compassion | 15 | Stallion | Final Furlong | |
| Without Warning | 9 | Stallion | AllegroThoroughbreds | |
| Witness Authority | 7 | Stallion | Black Storm West | |
| Witnessing Magic | 14 | Stallion | Final Furlong | |
| Witraż | 6 | Stallion | Clicker Lab | |
| Witty Actor | 11 | Stallion | Final Furlong | |
| Witty Air | 11 | Stallion | Final Furlong | |
| Witty Quartz | 8 | Stallion | Vimes Racing | |
| Witty Remark | 19 | Gelding | Final Furlong | |
| Wiz Kid | 12 | Stallion | Blackhawk Ridge | |
| Wizard | 12 | Stallion | Final Furlong | |