| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Wolver Heighs | c | Thoroughbred | Ireland | |||||
| Wolver Hollow | bay | c | 1964 | Sovereign Path | Cygnet | Thoroughbred | Great Britain | |
| Wolverina | bay | f | 1977 | Wolver Hollow | Miss London | Thoroughbred | Ireland | |
| Woman | chestnut | f | 2023 | 643090000617625 | 1755-7 Marrakech Express | 6327-8 Vensay | Thoroughbred | Mr Endaltsev A.I. |
| Woman Secret | bay | f | 2002 | Sadler's Wells | Monevassia | Thoroughbred | Ireland | |
| Wombwell | bay | c | 1903 | Thoroughbred | Great Britain | |||
| Women's Legion | f | Coronach | Thoroughbred | |||||
| Woming | c | 1975 | Bold And Free | Water Wings | Thoroughbred | Italy | ||
| Won't Linger | chestnut | f | 1961 | Worden 2 | Cherished | Thoroughbred | Great Britain | |
| Won't Tell You | bay | f | 1962 | Crafty Admiral | Scarlet Ribbon | Thoroughbred | USA |