| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Weekend Surprise | bay | f | 1980 | Secretariat | Lassie Dear | Thoroughbred | USA | |
| Weighbridge | chestnut | f | 1945 | Portlaw | Golden Way | Thoroughbred | Great Britain | |
| Weir | bay | f | 1896 | Galopin | Dee | Thoroughbred | Great Britain | |
| Weird | bay | f | 1959 | Tulyar | Irish Witch | Thoroughbred | USA | |
| Weisheit | bay | f | 1889 | Thoroughbred | Austria | |||
| Weissdorn | bay | c | 1922 | Thoroughbred | ||||
| Weiter | bay | f | 1893 | Thoroughbred | Austria | |||
| Wekiva Springs | grey | c | 1991 | Runaway Groom | Jetting Angel | Thoroughbred | USA | |
| Welbeck | br. | c | 1815 | Soothsayer | Pledge | Thoroughbred | Great Britain | |
| Welcome | bay | f | 1984 | Logical | Well Sun | Thoroughbred | Argentina |