| Name | Last Run |
|---|---|
| Oshaberi Biru | TRIAL Belmont, 17-Feb-25 |
| Oshakati | Greyville, 20-Dec-23 |
| Oshano | Chantilly, 21-Sep-24 |
| Oshia | Bordeaux Le Bouscat, 04-Nov-25 |
| Oshige | Kyoto, 12-Oct-24 |
| Oshira | San Isidro, 16-Oct-23 |
| OSHKOSH | Moe, 22-Nov-11 |
| Oshun | Middlemount, 30-Jul-22 |
| Osipenko | Randwick, 04-Nov-25 |
| Osipova | Landor, 02-Oct-23 |
| Osiris Brain | Niigata, 27-Apr-24 |
| Oskar | Thirsk, 04-Apr-23 |
| Oskar High | Galway, 09-Sep-25 |
| Oskar Martinez | Delaware Park, 09-Oct-25 |
| Oskee Wow Wow | Gulfstream, 05-Feb-23 |
| Oslen | Emerald, 08-Apr-23 |
| Oslo | Market Rasen, 28-Sep-25 |
| Oslo | Hawkesbury, 16-Dec-21 |
| Oslo Queen | Niigata, 19-Oct-25 |
| Osman | Gunnedah, 25-May-25 |
| Osman | Mizusawa, 24-Mar-25 |
| Osman Bey | Hipodromo Chile, 30-Apr-23 |
| Osmanthus | Mombetsu, 13-Aug-25 |
| Osmium | Seymour, 19-Feb-19 |
| Osmose | Eagle Farm, 28-Jun-25 |
| Osmosis | Toowoomba, 02-Mar-19 |
| Osmosis | Hipodromo Chile, 16-Mar-25 |
| Oso | Charles Town, 12-Sep-25 |
| Oso Good | Ipswich, 30-Jun-22 |
| Oso Great | Catterick, 23-Jul-25 |
| Oso Rapido | Southwell, 05-Nov-24 |
| Oso Savvy | Hawera, 21-Apr-24 |
| Oso Spirited | Hawkesbury, 26-Jun-25 |
| Osongeui Byeol | Seoul, 28-Jul-24 |
| Osopeppi | TRIAL Lark Hill, 05-May-25 |
| Osore | Kawasaki, 10-Sep-25 |
| Osorno | Tokyo, 18-May-25 |
| Osprey | Curragh, 03-Nov-24 |
| Osprey | Thistledown, 26-Jun-25 |
| Osprey Call | Wetherby, 28-Oct-22 |
| Osraige | Dundalk, 24-Nov-22 |
| Ossabuco | Doomben, 17-Nov-21 |
| OSSIE EMBRACE | Moonee Valley, 29-Oct-10 |
| Ossie Snip | Corowa, 13-Mar-16 |
| Ossie's Lodge | Fairyhouse, 15-Jun-24 |
| Ossifer Hops | Fairyhouse, 04-Nov-25 |
| Ossified | Albury, 07-Dec-24 |
| Ossu Eleven | Nagoya, 28-Oct-25 |
| Ostend | Perth, 23-Apr-25 |
| Osteonics | Gatton, 21-Mar-20 |
| Osterberg | Ffos Las, 29-Oct-25 |
| Osterberg | Murwillumbah, 05-Nov-24 |
| Osteria | Tauranga, 01-Nov-25 |
| Osteria | Gold Coast, 11-Feb-17 |
| Osteria | Kyoto, 02-Nov-25 |
| Ostermeier | Gold Coast, 23-May-25 |
| Osterville Public | Fair Grounds, 14-Feb-24 |
| Ostfalen | Nagoya, 30-Oct-25 |
| Ostfalen | Nagoya, 27-Feb-24 |
| Ostia | Deauville, 24-Aug-23 |