| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Acropolis | chestnut | c | 1952 | Donatello 2 | Aurora | Thoroughbred | Great Britain | |
| Acrosstheborder | d.-bay | f | 2004 | Include | Canadian Envoy | Thoroughbred | USA | |
| Acroterion | br. | c | 1962 | Hillsdale | Thoroughbred | USA | ||
| Acsess | chestnut | c | 2020 | 643090000485011 | 0976-5 Stradivarius | 4833-6 Take Your Mark | Thoroughbred | "Elbrus" Equestrian Club |
| Act Fun | d.-bay | f | 2007 | Fusaichi Pegasus | Dressed for Action | Thoroughbred | USA | |
| Act of Duty | chestnut | c | 2000 | Mr. Prospector | Nuryette | Thoroughbred | USA | |
| Act of Magic | bay | f | 1983 | Halo | Pleasant Girl | Thoroughbred | USA | |
| Act One | grey | c | 1999 | In the Wings | Summer Sonnet | Thoroughbred | Great Britain | |
| Act Quickly | bay | f | 2006 | Awesome Again | Instant Thought | Thoroughbred | USA | |
| Act So Noble | bay | f | 1999 | Wavering Monarch | Driven to Drink | Thoroughbred | USA |