| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Ubyl | grey | f | 1986 | 9858 Bezuprechnyy | 16978 Usmeshka | Orlov trotter | Zavivalovskii konzavod | |
| 9491 Ubytok | black | c | 1962 | Orlov trotter | Pskovskiy 18 | |||
| 11957 Ubytok | grey | c | 2004 | 10654 Bank | 18331 Ulybka | Orlov trotter | Zavivalovskii konzavod | |
| Uchast | black | f | 2018 | 11962 Chardash | Ugadchitsa | Orlov trotter | Zaporojskiy konzavod | |
| Uchastnik | black | c | 2009 | 11962 Chardash | Uvertyura | Orlov trotter | Zaporojskiy konzavod | |
| Uchastok | bay | c | 2009 | 11962 Chardash | Uslada | Trotter | Zaporojskiy k.z. | |
| Ucheba | grey | f | 1994 | ГПК21о,98 Bazol | 16974 Upravka | Orlov trotter | Khrenovskoy Stud | |
| 19152 Uchebnaya | f | 1994 | 10280 Barhatnyy | 16975 Uraza | Orlov trotter | Shahovskoy konzavod | ||
| 11888 Uchtivaya | bay | f | 1953 | 5963 Udel | 5167 Vagranka | Orlov trotter | Gryaznushinskiy | |
| Uchtivaya | grey | f | 1950 | 2132 Ulov | 7772 Taktika | Orlov trotter | Khrenovskoy Stud |