| Overextend | Morphettville Parks,
22-Mar-25 |
| Overflow Miss | Orange,
09-Oct-25 |
| Overfly | Moruya,
12-Apr-20 |
| Overfull | Morphettville,
26-Jul-25 |
| Overgrown | Beaudesert,
18-May-19 |
| Overhaul | Tampa Bay Downs,
10-Apr-25 |
| Overhaulin | Horsham,
23-Dec-12 |
| Overheer | Curragh,
07-Oct-23 |
| Overhymn | Moe,
11-Jul-25 |
| Overice | Newcastle,
25-Jan-25 |
| Overimpatient | Hughenden,
17-May-25 |
| Overindulge | TRIAL Doomben,
30-Jul-24 |
| Overindulgence | Churchill Downs,
13-Nov-23 |
| Overkill | The Valley,
24-Dec-22 |
| Overland | Hawkesbury,
28-Oct-25 |
| Overland | Chelmsford City,
01-Mar-24 |
| Overlander | Chukyo,
30-Aug-25 |
| Overlap | Sunshine Coast,
24-Feb-19 |
| Overload | Rockhampton,
03-Aug-17 |
| Overload | Mahoning Valley,
31-Oct-25 |
| Overloaded | Seymour,
12-Oct-25 |
| Overlooked | Newcastle,
09-Sep-25 |
| Overlord | Cairns,
22-Aug-25 |
| OVERLY | |
| Overly Critical | Mountaineer,
29-Oct-25 |
| Overly D'oro | Belterra Park,
01-Sep-23 |
| Overly Dramatic | Thistledown,
15-Oct-25 |
| Overly Fast | Turf Paradise,
12-Mar-25 |
| Overly Lucky | Canterbury Park,
07-Jun-24 |
| OVERLY POETIC | Bathurst,
28-Oct-11 |
| Overmann | Happy Valley,
15-Nov-23 |
| Overmars | Gulfstream,
10-Feb-25 |
| Overmaster | Funabashi,
31-Jul-25 |
| Overmuch | Penn National,
09-Mar-24 |
| Overnight | Greyville,
19-Oct-25 |
| Overnight Express | Charles Town,
30-Mar-25 |
| Overnight Oats | Ripon,
17-Apr-25 |
| Overnight Pow Wow | Charles Town,
12-Oct-25 |
| Overpass | Doomben,
17-May-25 |
| Overpriced Mixer | Wincanton,
01-Dec-22 |
| Overproof | Devonport Tapeta Synthetic,
17-Aug-14 |
| Overrated | Te Rapa,
27-Oct-25 |
| Overreach | Caulfield,
11-Oct-14 |
| OVERREACT | |
| Overreactive | Tuncurry,
10-Mar-18 |
| Overreign | Geraldton,
07-Dec-24 |
| Override | Ladbrokes Pioneer Park,
22-Sep-19 |
| Overriding | Rosehill Gardens,
11-Oct-25 |
| Overrule | Toowoomba,
23-Jul-16 |
| Overrule | Carlisle,
09-Jul-23 |
| Overrule | Golden Gate Fields,
25-Sep-23 |
| Overruled | Fannie Bay,
11-May-24 |
| OVERRULING | |
| Overrun | Albury,
12-Oct-24 |
| Overrun | Gulfstream,
09-Oct-23 |
| Overseas | Nanango,
17-May-25 |
| Overseas Letter | Mountaineer,
21-Jun-23 |
| Overshadows | Grafton,
19-Sep-14 |
| Overshare | Morphettville,
19-May-18 |
| Overshots | TRIAL Port Lincoln,
25-Oct-22 |