| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Up Spirits | bay | c | 1961 | Turn-To | Spring Run | Thoroughbred | USA | |
| Up the Flagpole | d.-bay | f | 1978 | Hoist The Flag | The Garden Club | Thoroughbred | USA | |
| Up the Hill | bay | f | 1938 | Jacopo | Gentle Tryst | Thoroughbred | USA | |
| Upas | chestnut | c | 1883 | Dollar | Thoroughbred | France | ||
| Upgrade | d.-bay | c | 2022 | 643115178479094 | 0934-5 Princ Behrens | 6181-8 Ayra Britt | Thoroughbred | Mr Burka A.V. |
| Upity Lady | bay | f | 1993 | Broad Brush | Natural Forest | Thoroughbred | USA | |
| Upleatham | d.-bay | f | 1938 | Coronach | Runaway Match | Thoroughbred | Great Britain | |
| Upor | chestnut | c | 1995 | 3613-1 Rastr | 0388-2 Intriga | Thoroughbred | Kalinin Farm | |
| Upornaya Ledi | bay | f | 2010 | 643094100136796 | 0932-5 Polo | 1105-3 Udachnaya | Thoroughbred | Svobodny Trud Farm |
| Upper Case | bay | c | 1969 | Round Table | Bold Experience | Thoroughbred | USA |