| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Unfinished Dream | d.-bay | f | 2001 | Silver Deputy | T.V. Countess | Thoroughbred | USA | |
| Unfolding Fish | bay | f | 2005 | Gilded Time | Four Pennies | Thoroughbred | USA | |
| Unforgetable You | chestnut | f | 1982 | Vice Regent | Amerigirl | Thoroughbred | Canada | |
| Unforgettable | chestnut | f | 1951 | Burning Dream | Cantadora | Thoroughbred | USA | |
| Unfurled | bay | f | 1974 | Hoist The Flag | Lemon Souffle | Thoroughbred | USA | |
| Unfuwain | bay | c | 1985 | Northern Dancer | Height of Fashion | Thoroughbred | USA | |
| 6489-8 Uni Best | bay | f | 2017 | не введён | Siyouni | 5693-7 Super Best | Thoroughbred | Volgogradsk Stud |
| Uni Cat | bay | f | 2024 | 643110800472951 | 1817-7 Chester Cat | 6489-8 Uni Best | Thoroughbred | Volgogradsk Stud |
| Unified | bay | c | 2013 | Candy Ride | Union City | Thoroughbred | USA | |
| Unifier | chestnut | f | 2002 | Deputy Minister | Unify | Thoroughbred | USA |