| Unified Love | Sam Houston Race Park,
10-Mar-25 |
| Unified Play | Laurel Park,
03-Feb-23 |
| Unified Report | Horseshoe Indianapolis,
13-May-25 |
| Unified Ride | Monmouth Park,
31-Jul-23 |
| Unified Usyk | Fairmount Park,
03-Sep-25 |
| Unified Weekend | Charles Town,
04-Oct-25 |
| Unifieds Princess | Tampa Bay Downs,
05-May-25 |
| Unifies | Moe,
04-Sep-25 |
| Uniflyer | Cessnock,
08-Oct-12 |
| Unifying | Kentucky Downs,
30-Aug-24 |
| Unigena | Pau,
18-Feb-25 |
| Unika | Valparaiso Sporting Club,
03-Aug-23 |
| Unika Etoile | Huntingdon,
10-Feb-23 |
| Unikat | Esperance,
13-Feb-21 |
| Unikee | Gulfstream,
08-Mar-24 |
| UNIKIN | Tamworth,
30-Jan-15 |
| Unilateral | Woodbine,
25-Nov-23 |
| Unilateralism | Beverley,
08-Jul-23 |
| Unimpeachable | Penn National,
11-May-23 |
| Unimpeached | Charles Town,
03-Dec-22 |
| UNINFORMED | |
| Uninhibited | Strathalbyn,
03-Oct-18 |
| Uninook | Belmont,
30-Nov-22 |
| Uninspired | Delta Downs,
08-Feb-25 |
| Uninsurabal | Scone,
10-Jun-25 |
| UNINTENTIONAL | Ipswich,
03-May-10 |
| Uninterrupted | Launceston,
28-Oct-20 |
| Uninvited | Goulburn,
16-Mar-12 |
| Uninvited Guest | Delaware Park,
05-Oct-25 |
| Union Alley | Naas,
03-Apr-25 |
| Union Army | Valparaiso Sporting Club,
01-May-25 |
| Union Army | Warwick Farm,
04-Dec-24 |
| Union Avenue | Cheltenham,
14-Mar-24 |
| Union Belle | Monmouth Park,
04-Aug-25 |
| UNION BELLE | |
| Union Bliss | Grants Pass,
17-Jun-23 |
| Union Branch | Mountaineer,
07-Oct-25 |
| Union Brother | Mountaineer,
14-Dec-23 |
| Union Bulldog | Colonial Downs,
04-Sep-25 |
| Union Cait | Hawthorne,
17-Oct-25 |
| Union Champ | Busan,
06-Apr-25 |
| Union City | Bunbury,
16-Jan-14 |
| Union City Blues | Gunnedah,
07-Oct-17 |
| Union Coach | Emerald Downs,
08-Sep-25 |
| Union Colonel | Fort Erie,
01-Oct-24 |
| Union Dame | Canterbury Park,
01-Sep-25 |
| Union Dance | Golden Gate Fields,
03-Jan-23 |
| Union Data | Lone Star,
14-Jun-25 |
| Union Delegate | Rockhampton,
04-Mar-25 |
| Union Dolly | Hawthorne,
17-Oct-25 |
| Union Doos | Monmouth Park,
01-Sep-25 |
| Union Dues | Ipswich,
17-May-19 |
| Union Empress | Horseshoe Indianapolis,
01-Oct-25 |
| Union Express | Belmont At The Big A,
14-Sep-25 |
| Union Flag | Musselburgh,
05-Feb-24 |
| Union Fleet | Colonial Downs,
03-Aug-25 |
| Union Folly | Penn National,
01-Mar-24 |
| Union Gap | Warwick Farm,
22-May-24 |
| Union Gen. George | Colonial Downs,
19-Jul-24 |
| Union Gig | Emerald Downs,
04-Jul-25 |
| Union Harbor | Emerald Downs,
11-Aug-25 |
| Union Harmony | Gulfstream,
21-Oct-24 |
| Union Heiress | Santa Anita,
04-Oct-25 |
| Union Helper Cen | Chantilly,
11-Oct-25 |
| Union Island | Newmarket,
20-Jul-25 |
| Union Jack | Belmont,
20-Aug-22 |
| Union Jackie | Kempton,
21-Dec-23 |
| Union Jukebox | Cairns,
16-Jul-19 |
| Union League | Mahoning Valley,
16-Nov-23 |
| Union Lights | Monmouth Park,
12-May-25 |
| Union Mist | Ellis Park,
17-Aug-25 |
| Union Navy | Finger Lakes,
23-Oct-25 |
| Union Park | Clonmel,
24-Oct-25 |
| Union Park | Monmouth Park,
31-Jul-23 |
| Union Purrfection | Monmouth Park,
10-Aug-25 |
| Union Quality | Canterbury Park,
14-Jul-23 |
| Union Rally | Penn National,
08-Jul-23 |
| Union Rep | Hamilton,
30-Nov-15 |
| Union Reward | Philadelphia Park,
02-Nov-23 |
| Union Roll | Churchill Downs,
17-Sep-23 |
| Union Rose | Turffontein,
30-Oct-25 |
| Union Rose | Churchill Downs,
20-Sep-25 |
| Union Run | Turfway Park,
15-Dec-23 |
| Union Secrets | Santa Anita,
06-Oct-25 |
| Union Spirit | Cootamundra,
26-Apr-25 |
| Union Square | TRIAL Lark Hill,
09-Aug-21 |
| Union Square | Lyon La Soie,
13-Mar-25 |
| Union Square | Turffontein,
14-Oct-23 |
| Union Station | Fairyhouse,
21-Apr-25 |
| Union Station | Mountaineer,
07-Nov-23 |
| Union Street | Ipswich,
01-Feb-13 |
| Union Suit | Aqueduct,
14-Feb-25 |
| Union Swag | Thistledown,
28-Aug-25 |
| Union Tap | Aqueduct,
02-Dec-23 |
| Union Thunder | Colonial Downs,
07-Sep-25 |
| Union Trail | Saratoga,
20-Jul-25 |
| Union Train | Del Mar,
05-Aug-23 |
| Union Warrior | Terang,
01-Jan-25 |
| Union Wave | Del Mar,
02-Sep-25 |
| Unionville | Cork,
11-Sep-25 |