| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| 1003-3 Uniya | d.-bay | f | 1993 | 3524-1 Gabion | 6845-1 Formatziya | Thoroughbred | APK "Kavkaz" | |
| Unkad | bay | c | 2002 | 0103-2 Corvinius | 0742-2 Ulybka | Thoroughbred | Mr Tharkakhov N.H. | |
| Unkas | d.-bay | c | 1994 | 3405-1 Gorsk | 6323 Gabanera | Thoroughbred | Schastlivoe Farm | |
| Unkenruf | bay | c | 1930 | Prunus | Thoroughbred | Germany | ||
| unknown mare | f | Thoroughbred | ||||||
| Unknown Quantity | bay | f | 1946 | Blue Peter | Thoroughbred | Great Britain | ||
| unknown stallion. | c | Thoroughbred | ||||||
| Unna | br. | f | 1956 | Cyrus The Great | Ucrania | Thoroughbred | Argentina | |
| unnamed | bay | f | 2021 | ne ch/k zher. | Esli | Thoroughbred | Mr Salimgareev R. R. | |
| unnamed | chestnut | f | 2022 | 643090000561771 | 1171-6 Flash of Hope | 6218-8 Mukhtay | Thoroughbred | Mr. Hahalev R.O. |