| Omac Donald | Lone Star Park,
01-Nov-25 |
| Omache Girl | Emerald Downs,
14-Jul-25 |
| OMADARLIN | Hawkesbury,
21-May-09 |
| Omaha City | Gulfstream,
07-Apr-25 |
| Omaha Dawn | Balaklava,
01-Oct-25 |
| Omaha Eight | Delaware Park,
04-Aug-24 |
| Omaha Girl | Santa Anita,
06-Apr-25 |
| Omaha Omaha | Delaware Park,
15-Jun-25 |
| Omaha Pistol | Finger Lakes,
26-Aug-25 |
| Omaha Princess | Morphettville Parks,
06-Sep-25 |
| Omaha Red | Fair Grounds,
25-Feb-24 |
| Omaha Sand | Wyong,
24-Jul-25 |
| Omaha Stamp | Hawthorne,
18-Aug-25 |
| Omaha Storm | Belmont At The Big A,
03-Oct-25 |
| Omaha Wish | Southwell,
04-Feb-25 |
| Omahamoiselle | Monmouth Park,
25-Aug-25 |
| Omaka | Wyong,
22-Sep-20 |
| Omakase | Navan,
07-Jun-25 |
| Omakase | Sha Tin,
05-Jan-25 |
| Omamori | Sandown Hillside,
01-Oct-25 |
| Oman | Wolverhampton,
26-Oct-25 |
| Omanyala | Morphettville Parks,
29-Jun-24 |
| Omar | Newcastle,
25-May-24 |
| Omar Comin | Penn National,
19-Sep-25 |
| Omar Navarro | Curragh,
23-Oct-22 |
| Omari | San Isidro,
15-May-25 |
| Omarion | Ladbrokes Park Hillside,
04-Jan-17 |
| Omarosa | Dubbo,
03-Mar-23 |
| OMASOTO YAMASUBARU | |
| Omataseshimashita | Funabashi,
31-Aug-25 |
| Omati | Tampa Bay Downs,
22-Apr-23 |
| Omatsuri Otoko | Sonoda,
01-Aug-25 |
| Omatsusama | Funabashi,
17-Jan-24 |
| Omaygod | Valparaiso Sporting Club,
15-May-25 |
| Ombra Mattino | Clifford Park,
08-May-10 |
| Ombra Sierra | Swan Hill,
07-Oct-13 |
| OMBRE | Gold Coast,
01-Jan-11 |
| Ombre Volante | Dalby,
29-Oct-22 |
| Ombrecell | Epsom Downs,
11-Sep-25 |
| Ombudsman | Ascot,
18-Oct-25 |
| Ombudsman | Turffontein,
04-Oct-25 |
| Omega | Mount Isa,
09-Jul-16 |
| Omega | Worcester,
08-Jul-24 |
| Omega Boy | Tauherenikau,
01-Nov-25 |
| Omega Captain | Nakayama,
30-Mar-25 |
| Omega Deluxe | Fukushima,
06-Nov-22 |
| Omega Dickon | Tokyo,
02-Nov-25 |
| Omega Drive | Sapporo,
26-Jul-25 |
| Omega Eclair | Sapporo,
09-Aug-25 |
| Omega Gold | Mahoning Valley,
02-Jan-24 |
| Omega Guiness | Chukyo,
27-Jul-25 |
| Omega Heritage | Kasamatsu,
10-Jan-25 |
| Omega Imperial | Hakodate,
28-Jun-25 |
| Omega Jacaranda | Nakayama,
16-Dec-23 |
| Omega Jasmine | Urawa,
25-Jun-25 |
| Omega Jetman | Sonoda,
03-Oct-25 |
| Omega Kingdom | Kokura,
21-Jul-24 |
| Omega La Broche | Kochi,
08-Jan-24 |
| Omega Legend | Nagoya,
20-Aug-25 |
| Omega Morning | Sonoda,
19-Jul-24 |