| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Advance | c | 1981 | Habitat | Gay Trinket | Thoroughbred | Great Britain | ||
| Advancing Star | bay | f | 1993 | Soviet Star | Fair Advantage | Thoroughbred | USA | |
| Advantage | bay | f | 1920 | Bachelor's Double | Vantage | Thoroughbred | ||
| Advent | d.-bay | c | 2006 | 643094100000059 | 0410-3 Dragun | 0038-2 Aristida | Thoroughbred | Verhovoi Kruiz Farm |
| 228 Adventure | bay | c | 1922 | Gay Crusader | Swollow | Thoroughbred | Great Britain | |
| Adventure Bay | bay | f | 2018 | Ghostzapper | Biofuel | Thoroughbred | USA | |
| Adventurer | d.-bay | c | 1859 | Newminster | Palma | Thoroughbred | Great Britain | |
| Adventuress | black | f | 1880 | Thoroughbred | Great Britain | |||
| Adventurine | chestnut | f | 1984 | Thatching | Forever Amber | Thoroughbred | ||
| Adventurous | bay | f | 1940 | Discovery | Elf Lock | Thoroughbred | USA |