| OLD SOLDIER | Fannie Bay,
15-Jan-10 |
| Old Song | Eagle Farm,
18-Oct-25 |
| Old Soul | Fairyhouse,
22-Apr-25 |
| Old Stormy | Darwin,
03-Dec-16 |
| Old Style Humor | Punchestown,
26-Apr-23 |
| Old Thunder | Gatton,
20-Oct-23 |
| Old Time Chaser | Sandown,
01-Feb-25 |
| Old Time Rock | Morphettville Parks,
06-Aug-25 |
| Old Time Rocknroll | Saratoga,
24-Aug-25 |
| Old Times | Landor,
30-Sep-24 |
| Old Timing Man | Lismore,
19-Oct-25 |
| Old Toby | Will Rogers Downs,
30-Apr-24 |
| Old Town Garde | Taunton,
14-Dec-23 |
| Old Town Predator | Carnarvon,
14-Jun-24 |
| Old Town Road | Tauherenikau,
01-Nov-25 |
| Old Town Road | Roma,
16-Nov-24 |
| Old Town Road | Presque Isle Downs,
01-Jul-25 |
| Old Trace | Horseshoe Indianapolis,
23-Oct-25 |
| Old Triangle | Emerald Downs,
07-Jun-25 |
| OLD TRICK | |
| Old Trieste | Kingscote,
20-Feb-21 |
| Old Victoria | Aintree,
03-Dec-22 |
| Old West | Turf Paradise,
19-Mar-24 |
| OLDBLUEEYES | |
| Oldbury Lad | Ffos Las,
29-Aug-25 |
| Olde Fury | |
| Olden | Belmont,
06-Sep-25 |
| Olden Times | Bunbury,
23-Dec-12 |
| Older And Wiser | Fair Grounds,
21-Mar-25 |
| Older Brother | Turf Paradise,
26-Dec-22 |
| Older Than Time | Royal Randwick,
28-Apr-12 |
| Oldfashlovesong | Remington Park,
05-Oct-25 |
| Oldpop | Gawler,
06-Nov-25 |
| Oldstroem | Mornington,
07-May-12 |
| Oldtimerock'n'roll | Cooktown,
11-Nov-23 |
| Oldtown | Sha Tin,
12-Oct-25 |
| Oldtown To Emly | Roscommon,
10-Jun-25 |
| Olduvai | Kyoto,
06-Jan-24 |
| Oldwally | Ipswich,
06-Jul-12 |
| Oldwood Lad | Ludlow,
10-Oct-24 |
| Oldzfourfortytwo | Presque Isle Downs,
04-Jun-25 |
| Ole Ali | Eagle Farm,
22-Oct-25 |
| Ole Anuenue | Saga,
19-Oct-25 |
| Ole Authority | Penn National,
19-Sep-25 |
| Ole Bazzle | Sunshine Coast,
19-Oct-25 |
| Ole Crazy Bone | Kentucky Downs,
07-Sep-25 |
| Ole Dancer | Caulfield,
18-Oct-25 |
| Ole Filles | Clairefontaine,
29-Jul-25 |
| Ole Got Swagger | Wyong,
31-Aug-25 |
| Ole Grande | Ascot,
18-Oct-25 |
| Ole Kirk | Flemington,
27-Feb-21 |
| Ole Lady | Scone,
13-Oct-25 |
| Ole Ola | Hobart,
07-Feb-25 |
| Ole Ole | Clairefontaine,
17-Jul-25 |
| Ole Pablo | Toowoomba,
12-Mar-16 |
| Ole Red Wing | Gulfstream,
14-Mar-25 |
| Ole Sal | Gunnedah,
09-Dec-17 |
| Ole Silver | Santa Anita,
29-Sep-25 |
| Ole Slew Foot | Horseshoe Indianapolis,
31-Aug-25 |
| Ole Stud Muffin | Fair Grounds,
17-Feb-24 |