| Equid | Horse Name ▼ | Breed | Age | Gender | Color | Discipline | Owner |
|---|---|---|---|---|---|---|---|
| 088313S | Unwritten | Arabian Pony | SY13 (12yo) | Mare | Black | HU | Manders |
| 178711C | Unstoppable | Appaloosa | SY11 (14yo) | Stallion | Black Blanket | WS | Lissa |
| 244321C | Unseen Choices | Appendix Quarter Horse | SY21 (4yo) | Stallion | Black | WW | Jewel |
| 223221B | Unplanned Layover | Appaloosa | SY21 (4yo) | Mare | Buckskin Leopard | SR | Lissa |
| 349025B | Uno Dos Tres CR | Quarter Horse | SY25 (0yo) | Stallion | Buckskin | WW | Soleil |
| 330421B | Unlucky At Love | Thoroughbred | SY21 (4yo) | Mare | Grey | EV | Rhianon |
| 263624B | Unhinged and Feral | Thoroughbred | SY24 (1yo) | Mare | Smoky Black Sabino | FR | Morrigan |
| 265422B | Unhawked | Thoroughbred | SY22 (3yo) | Stallion | Chestnut Overo Sabino | FR | Lissa |
| 241222C | Unfavorable Semicircle | Paint Horse | SY22 (3yo) | Mare | Bay Tobiano | SR | Morrigan |
| 150613C | Unexpected | Thoroughbred | SY13 (12yo) | Mare | Chestnut | HU | Lissa |
| 234522B | Unended | Appaloosa | SY22 (3yo) | Mare | Buckskin Roan Blanket | SR | Lissa |
| 226622B | Underwolfed | Appaloosa | SY22 (3yo) | Stallion | Red Dun Roan Blanket | SR | Lissa |
| 150413C | Underrated | Thoroughbred | SY13 (12yo) | Stallion | Chestnut | EN | Lissa |
| 204222C | Under The Radar | Appendix Quarter Horse | SY22 (3yo) | Stallion | Cremello | SR | Jewel |
| 177311C | Under My Thumb | Appaloosa | SY11 (14yo) | Mare | Red Roan Blanket | WS | Lissa |
| 379619C | Uncle Toms Cabin | Carolina Marsh Tacky | SY19 (6yo) | Stallion | Blue Roan | WE | Manders |
| 123821C | Uncle Kracker | Thoroughbred | SY21 (4yo) | Stallion | Flaxen Chestnut | CC | Manders |
| 099716S | Unbound | Losino Pony | SY16 (9yo) | Stallion | Black | WE | The Orchard |
| 234222B | Unbangable | Appaloosa | SY22 (3yo) | Mare | Black Blanket | SR | Lissa |
| 234322B | Unamoeba | Appaloosa | SY22 (3yo) | Mare | Blue Roan Blanket | SR | Lissa |
| 154414C | Ukraine | Akhal Teke | SY14 (11yo) | Stallion | Palomino | EN | Manders |
| 114916C | Ukko | Finnhorse | SY16 (9yo) | Stallion | Chestnut | DG | Merry |
| 020310C | U Seem Surprised | Connemara | SY10 (15yo) | Stallion | Bay | JP | Rhianon |
| 207520B | U Seem Lucky | Connemara | SY20 (5yo) | Mare | Bay | JP | Manders |
| 398322B | U Seem Easy | Connemara | SY22 (3yo) | Mare | Bay | JP | Rhianon |
