| OLIVONA | |
| Olizano | TRIAL Royal Randwick,
01-May-23 |
| Olkovskha | Laurel Park,
21-Oct-23 |
| Ollandia Beach | Albury,
19-Aug-25 |
| Ollican | Wagga,
27-Jun-16 |
| Ollie Boy | Charles Town,
01-Nov-25 |
| Ollie Can Dance | Aqueduct,
05-Apr-25 |
| Ollie Champ | Pakenham Synthetic,
19-Jun-15 |
| Ollie La Ba Ba | Clonmel,
24-Oct-25 |
| Ollie's Barrel | Bunbury,
21-Jan-24 |
| Ollie's Folly | Thistledown,
22-Jun-25 |
| Ollie's Gold | Devonport Tapeta Synthetic,
30-Jul-17 |
| Ollie's Secret | Newcastle,
18-Oct-25 |
| Ollie's Stand | Rockhampton,
18-Nov-21 |
| Olliemeister | Oaklawn Park,
07-Apr-24 |
| Olliemyboy | Churchill Downs,
02-Jun-23 |
| Ollies Gonna Win | William Hill Park Hillside,
22-Aug-12 |
| Ollies Quest | Hawkesbury,
05-Aug-10 |
| Ollivander | Parkes,
27-Jan-24 |
| OLLIWALLY | |
| Olly Norse | Stratford,
01-Jun-24 |
| Olly's Fortune | Camperdown,
18-Jan-25 |
| Olney | Geelong,
23-May-25 |
| Olopatadine | Sapporo,
30-Aug-25 |
| OLOPREY | Bairnsdale,
07-Jul-09 |
| Olord | Listowel,
31-May-25 |
| Olorin | Kensington,
26-Jun-19 |
| Oloroso | Ipswich,
10-Jan-15 |
| Olorun | Gulfstream,
14-Aug-23 |
| Olouna | Senonnes-Pouance,
05-Jul-23 |
| Olpadan | Nakayama,
24-Feb-24 |
| Olperer | Nagoya,
16-Oct-25 |
| Oltre Finito | Grafton,
08-Feb-18 |
| Olu Deniz | Lakeside,
21-Apr-10 |
| Oludeniz | Charles Town,
21-Apr-24 |
| Olufsen | Canterbury,
23-Jul-25 |
| Oluolu | Funabashi,
06-Feb-24 |
| Olverston | Greyville,
22-Jan-24 |
| Olvidate | San Isidro,
21-Apr-24 |
| Oly Boom | Roma,
03-Aug-24 |
| Oly Good | Hipodromo Chile,
11-May-25 |
| Oly's Choice | Pinjarra,
23-Feb-25 |
| Olya | Deauville,
02-Nov-25 |
| Olyjess | Sapphire Coast,
31-Mar-17 |
| Olympe De Gouge | Dax,
23-Aug-23 |
| Olympe Mancini | Compiegne,
25-Jul-25 |
| Olympe Tea | Moulins,
14-Apr-24 |
| Olympia | Singapore,
26-Nov-22 |
| Olympia Rose | TRIAL Scone,
15-Feb-23 |
| Olympia's Flame | Toowoomba,
08-Aug-15 |
| Olympiad | Echuca,
10-Aug-25 |
| Olympiade | Bordeaux Le Bouscat,
19-Nov-23 |
| Olympian Gold | Turffontein,
30-Oct-25 |
| Olympian Princess | Concepcion,
05-Feb-25 |
| Olympias Girl | Pakenham,
11-Nov-11 |
| Olympic Artist | Gulfstream,
18-Mar-24 |
| Olympic Belle | Goulburn,
24-Feb-12 |
| Olympic Candle | Meydan,
15-Mar-25 |
| Olympic City | Geraldton,
18-Feb-10 |
| Olympic Class | Ipswich,
29-Feb-24 |