| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Aboukir II | c | Gold Nib | Egyptian Rose | Thoroughbred | ||||
| Above Board | bay | f | 1947 | Straight Deal | Feola | Thoroughbred | Great Britain | |
| Above Perfection | d.-bay | f | 1998 | In Excess | Something Perfect | Thoroughbred | USA | |
| Above Suspicion | bay | c | 1956 | Court Martial | Above Board | Thoroughbred | Great Britain | |
| Aboyeur | bay | c | 1910 | Desmond | Pawky | Thoroughbred | Great Britain | |
| Abra | chestnut | f | 1907 | Virad | Luna | Thoroughbred | ||
| Abra | chestnut | f | 1969 | 3009 Bosfor | 2741 Asada | Thoroughbred | Issyk-Kul Stud | |
| Abracadabra | bay | f | 1996 | Fairy King | Allicance | Thoroughbred | France | |
| Abracadabra | grey | f | 1957 | Abernant | Malcolmia | Thoroughbred | Great Britain | |
| Abrade | chestnut | f | 1989 | Mr. Prospector | File | Thoroughbred | USA |