| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Uollakot | d.-bay | c | 1898 | Ruler | Image | Thoroughbred | ||
| Uork Knyaz | chestnut | c | 2008 | 643110000011996 | 0270-3 Kama Sutra | 1512-3 Vais Princess | Thoroughbred | Mr Tharkakhov N.H. |
| Uork Ru | bay | c | 2017 | не введен | 0824-5 Gubernator Ru | 3434-5 Ursula Vtoraia | Thoroughbred | Mr Tharkakhov N.H. |
| Uork-Dantzer | bay | c | 1996 | Shareef Dancer | 0003-2 Abona | Thoroughbred | Erdan Farm | |
| Uotford | bay | c | 2017 | 643093300013105 | 1066-5 Forever Oligarh | 1891-4 Ulviia | Thoroughbred | APK "Kavkaz" |
| Up an Eighth | bay | f | 1991 | Ferdinand | Hey Majesty | Thoroughbred | USA | |
| Up and Above | chestnut | f | 1994 | Mt. Livermore | A Dream Above | Thoroughbred | Canada | |
| Up And At'em | bay | c | 1990 | Forzando | Ergo | Thoroughbred | Great Britain | |
| Up Mo Gale | bay | f | 2023 | 981020051148220 | Upstart | Mommo | Thoroughbred | Joseph Burke & Wansdyke Farms LTD. |
| Up Oars | br. | f | 1962 | Turn-To | Nile Lily | Thoroughbred | USA |