| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Three Martinis | bay | c | 1968 | Third Martini | Three Fingers | Thoroughbred | USA | |
| Three of a Kind | d.-bay | f | 1995 | Carson City | Wendover Way | Thoroughbred | USA | |
| 7471 Three Parts | bay | f | 1981 | Quiet Fling | Galoprise | Thoroughbred | Great Britain | |
| Three Piece | bay | f | 1983 | Jaazeiro | Trinity Term | Thoroughbred | Ireland | |
| Three Red Bells | bay | f | 1969 | Third Martini | Red Belle | Thoroughbred | USA | |
| 5492-7 Three Streets | chestnut | f | 2014 | 643090000208153 | 0473-4 Street Poker | 3415-5 Three Graces | Thoroughbred | Progress Farm |
| Three Tees | bay | f | 1962 | Tim Tam | Teretania | Thoroughbred | USA | |
| Three Up | bay | f | 1961 | Decathlon | Cequillo | Thoroughbred | USA | |
| Three Weeks | chestnut | f | 1946 | Big Game | Eleanor Cross | Thoroughbred | Great Britain | |
| Thriff | chestnut | f | 1865 | Stockwell | Braxey | Thoroughbred | Great Britain |