| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Winver | chestnut | f | 1972 | Vertex | Windsor Lady | Thoroughbred | USA | |
| Wire | br. | f | 1811 | Waxy | Penelope | Thoroughbred | Great Britain | |
| Wire-Tapper | chestnut | c | 1938 | Ksar | Mata Hari | Thoroughbred | USA | |
| 4560-6 Wirtus | chestnut | f | 2002 | 985101024054709 | Wolfhound | Toffolux | Thoroughbred | Great Britain |
| Wiscasset | bay | f | 2000 | Kris S | Tara Roma | Thoroughbred | USA | |
| Wisdom | bay | c | 1873 | Blinkhoolie | Thoroughbred | |||
| Wisdom | d.-bay | f | 1975 | Hail to Reason | Taken Aback | Thoroughbred | USA | |
| Wise Ally | br. | f | 1937 | Wise Counsellor | Belle Alliance | Thoroughbred | USA | |
| Wise Bride | bay | f | 1987 | Blushing Groom | Wising Up | Thoroughbred | USA | |
| Wise Counsellor | chestnut | c | 1921 | Thoroughbred | USA |