| Okarito River | Punchestown,
23-May-23 |
| OKAROCKET | Dongara-Irwin,
30-Mar-13 |
| Okataina | TRIAL Traralgon,
10-May-24 |
| Okavango | Greyville,
05-Jul-25 |
| Okavango Delta | Perth,
03-Jul-25 |
| Okay Annie | AVON,
11-Nov-13 |
| Okay Cupid | The Valley,
12-Aug-23 |
| Okay Fine | Gulfstream,
29-Dec-24 |
| Okay Lillee | Beaudesert,
20-Oct-17 |
| Okay Okay | Chinchilla,
23-May-23 |
| Okay Pal | Riccarton Park,
24-Jun-23 |
| Okay To Pay | Morphettville Parks,
23-Sep-23 |
| Okay You Say When | Sunland Park,
19-Jan-24 |
| Okay Zoomer | Griffith,
13-Sep-25 |
| Okaya Cap | Palermo,
24-Sep-23 |
| Okcharlie | TRIAL Toowoomba Inner Track,
01-Apr-25 |
| Okcheon Choegang | Seoul,
07-Apr-24 |
| Okcheon Sniper | Seoul,
07-Jul-24 |
| Okcheon Win Star | Seoul,
27-Apr-25 |
| Okdong Gongju | Seoul,
25-Jun-23 |
| Oke Moon | Wagga Riverside,
24-May-25 |
| Okeanis | Kyoto,
12-Oct-25 |
| Okeanos | Yarmouth,
16-Oct-23 |
| Okeechobee | Haydock,
09-Aug-25 |
| Okehampton | Funabashi,
31-Jul-25 |
| Okemaru | Sonoda,
26-Jun-25 |
| Oken Amazoness | Mizusawa,
30-Jun-25 |
| Oken Berry | Niigata,
17-Aug-25 |
| Oken Biryu | Mizusawa,
28-Nov-23 |
| Oken Bolt | Tokyo,
01-Nov-25 |
| Oken Boss | Nagoya,
30-Oct-25 |
| Oken Dawn | Kochi,
12-Aug-23 |
| Oken Duke | Kawasaki,
14-Oct-25 |
| Oken Fighter | Sonoda,
03-Nov-25 |
| Oken Honey | Tokyo,
13-Oct-25 |
| Oken Light | Nagoya,
31-Mar-25 |
| Oken Mickey | Mizusawa,
11-Dec-23 |
| Oken Moon | Urawa,
20-Nov-24 |
| Oken Moon Ai | Niigata,
17-Aug-24 |
| Oken Rosita | Nakayama,
24-Dec-23 |
| Oken Silver | Tokyo,
01-Nov-25 |
| Oken Top | Nagoya,
17-Jun-25 |
| Oken Venus | Niigata,
26-Oct-25 |
| Okeoke | Saint-Cloud,
27-Sep-24 |
| Okesutora | Doomben,
06-Aug-25 |
| Okey Dokey Smokey | Canterbury Park,
17-Jul-23 |
| Okeyspecialdaddy | Sunland Park,
23-Feb-25 |
| Okiagari Koboshi | Ohi,
20-Oct-25 |
| Okie Attitude | Remington Park,
11-Oct-24 |
| Okie Bandit | Remington Park,
26-Oct-25 |
| Okie Bling | Remington Park,
12-Oct-25 |
| Okie Chrome | Will Rogers Downs,
30-Apr-24 |
| Okie Clipper | Remington Park,
16-Aug-25 |
| Okie Code | Will Rogers Downs,
25-Mar-25 |
| Okie Cody | Remington Park,
30-Sep-24 |
| Okie Freeze | Sunland Park,
01-Mar-24 |
| Okie Front | Remington Park,
14-Nov-23 |
| Okie Heat | Will Rogers Downs,
17-May-23 |
| Okie Hope | Remington Park,
10-Oct-24 |
| Okie Love | Remington Park,
18-Oct-25 |