| Old Ground | Clonmel,
12-May-23 |
| OLD GURU | |
| Old Habits | Doomben,
17-Nov-18 |
| Old Habits New Tricks | Lone Star Park,
18-Oct-25 |
| Old Harrovian | Newcastle,
18-Apr-25 |
| Old Head | Philadelphia Park,
30-Aug-23 |
| Old Highway | Canberra Acton,
08-Jun-12 |
| Old Is Gold | York,
20-Aug-25 |
| OLD JOCK | Hawkesbury,
01-Aug-12 |
| Old King Cole | |
| Old Lion Cen | Lyon-Parilly,
02-Jun-24 |
| Old Lofty | Ipswich,
07-Jun-13 |
| Old Lonesome Me | Ballinrobe,
31-May-23 |
| Old Maid | bet365 Park Kilmore,
11-May-23 |
| Old Mama Cas | Cairns,
10-May-14 |
| Old Man Emu | Canberra Acton,
21-May-21 |
| Old Man Mac | Mahoning Valley,
12-Jan-23 |
| Old Man Pat | Warwick,
17-Jun-23 |
| Old Man Winter | Finger Lakes,
29-Oct-25 |
| Old Maribo | Queanbeyan,
12-Jan-19 |
| Old Mario | San Isidro,
23-Jan-25 |
| Old Mate | Gold Coast,
24-Mar-18 |
| Old Mate Bluey | Port Augusta,
24-Aug-25 |
| Old Mate Henry | Ascot,
11-Oct-25 |
| Old Mate Shov | Muswellbrook,
29-Mar-15 |
| Old Mate Smithy | Pioneer Park,
12-Oct-24 |
| OLD MATES ACT | Townsville,
05-Mar-13 |
| Old Mexican | Leopardstown,
12-Jul-24 |
| Old Mick | Bunbury,
22-Nov-20 |
| Old Mine | Kanazawa,
24-Dec-24 |
| Old Money | Remington Park,
29-Sep-25 |
| Old Navy | Tauherenikau,
06-Feb-24 |
| Old Newmarket | Port Augusta,
01-Sep-24 |
| Old News | Newcastle,
16-Aug-23 |
| Old North | Royal Randwick,
15-Sep-18 |
| Old Page | Cartmel,
23-Aug-25 |
| Old Painless | Hereford,
13-Feb-25 |
| Old Pal | Santa Anita,
12-Oct-25 |
| OLD PAT | Warrnambool,
15-Sep-09 |
| OLD PECULIAR | |
| Old Peculier | Kempton,
06-Apr-24 |
| Old Penny | Bunbury,
13-Jan-11 |
| OLD PIRATE | Belmont,
05-Oct-11 |
| Old Point | Finger Lakes,
28-Aug-24 |
| Old Port | Punchestown,
14-Jan-24 |
| Old Pulteney | Ascot,
17-May-17 |
| Old Q | Kenilworth,
02-Dec-23 |
| OLD QUALITY | |
| Old Redemption | TRIAL Traralgon,
07-Mar-24 |
| OLD REGRET | Hawkesbury,
19-Dec-10 |
| Old Rider | San Isidro,
05-May-25 |
| Old Salt | Mareeba,
29-Mar-25 |
| Old Saxony | Southwell,
22-Oct-24 |
| Old School | Prairie,
07-Sep-24 |
| Old Sea | Curragh,
29-Sep-24 |
| Old Secrets | Woodbine,
13-Dec-24 |
| Old Seventeen | Remington Park,
01-Nov-24 |
| Old Sir John | Wagga,
27-Feb-16 |
| Old Smoke | Ayr,
23-Sep-23 |
| Old Smokey | Mackay,
13-Dec-18 |