| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Without You Babe | chestnut | f | 2005 | Lemon Drop Kid | Marozia | Thoroughbred | USA | |
| Withy Norma | f | Crimson Satan | Tomratta | Thoroughbred | ||||
| Witness | d.-bay | f | 1955 | Court Martial | Crawley Beauty | Thoroughbred | Great Britain | |
| Wittgenstein | d.-bay | c | 1971 | Roi Dagobert | Stavroula | Thoroughbred | USA | |
| Witty | chestnut | f | 1946 | Rhodes Scholar | Native Gal | Thoroughbred | USA | |
| 6999-8 Wiz Village Karen | d.-bay | f | 2019 | 981020031369352 | Curlin | Wild Mint | Thoroughbred | Katie Rich Farms |
| Wizard King | bay | c | 1991 | Shaadi | Broomstick Cottege | Thoroughbred | Great Britain | |
| Wizard-mare | chestnut | f | 1813 | Thoroughbred | Great Britain | |||
| Wodenblock | br. | c | 1826 | Thoroughbred | Great Britain | |||
| Woe Is Me | grey | f | 1949 | Bull Dog | Grey Mood | Thoroughbred | USA |