| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| With Patience | d.-bay | f | 1974 | Nodouble | First Chapter | Thoroughbred | USA | |
| With Regards | bay | c | 1939 | Jack High | Thoroughbred | USA | ||
| With Winnie | chestnut | f | 1956 | Thoroughbred | USA | |||
| Withallprobability | bay | f | 1988 | Mr. Prospector | Sulemeif | Thoroughbred | USA | |
| Witherite | chestnut | f | 1958 | Ky. Colonel | Whither Wander | Thoroughbred | USA | |
| Without Reproach | bay | f | 1962 | Above Suspicion | Tiona | Thoroughbred | Great Britain | |
| 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 |