| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Udarnik | d.-grey | c | 1988 | 011009(А) Rugby's Star | 016548 Udal | Trotter | Gestut Moskowskiy N 1 | |
| Udarnik | d.-bay | c | 2004 | 011588(А) Giant Dynasty | 021947(А) Windifly Bunnes | American Trotter | ch/v Kim A.A., Bashkortostan | |
| Udav | bay | c | 2000 | 011585(А) Diktor | 021906 Uprava | Trotter | AOZT "Kushumskoe" Ershovskogo | |
| 09308 Udel | black | c | 1958 | 04419 Kuzbass | 07825 Uraniya | Trotter | "Aleksandrovsk Stud N 12" | |
| 5963 Udel | chestnut | c | 1940 | 3231 Luch | 4714 Udalaya | Orlov trotter | Gryaznushinskiy k.z. | |
| Udel | bay | c | 1982 | 08632(А) Apex Hanover | 015283 Uraniya | Trotter | OKZ VNIIK | |
| Udel Khrabrykh Lok | bay | c | 2024 | 900217000519468 | 013426(А) Hudson River | 026725(Ф) Uberlandia | French Trotter | "Konny zavod "Lokotskoy" |
| Udivitelnaya Pan | d.-bay | f | 2018 | In Dix Huit | 026551 Uverennaia | Trotter | Protskiy A.N. | |
| 8911 Udivitelnyi | bay | c | 1957 | 6401 Diujak | 10490 Uteha | Orlov trotter | Kurganskii k.z. | |
| Udobnyi | grey | c | 1980 | 09800 Barbaris | Uganda | Trotter | sh "Rassvet" Celinogradskoi ob |