| Ionica | Royal Randwick,
10-Jul-10 |
| Ionity | Ffos Las,
10-Nov-24 |
| Ionlythinkofyou | Ladbrokes Park Lakeside,
07-Jun-17 |
| Ionosfera | Club Hipico Santiago,
28-Oct-23 |
| Iontach Cheval | Warwick,
22-Feb-25 |
| Iorana | Urawa,
23-Sep-25 |
| Iorana Vallis | Compiegne,
07-Apr-25 |
| Iorangi De L'isle | Newcastle,
01-Nov-24 |
| Iorens | Sligo,
11-Jun-25 |
| Iori | Kawasaki,
14-Oct-25 |
| Ios Honey | Quirindi,
23-Jun-11 |
| Iosefa Demonmirail | Fontainebleau,
14-Oct-24 |
| Ioum Rochelais | Craon,
01-Dec-24 |
| Ioup La La | Fontainebleau,
20-Nov-23 |
| Ioupy Collonges | Uttoxeter,
16-Mar-25 |
| Iova | Finger Lakes,
08-Nov-23 |
| Iowa | Ascot,
03-May-25 |
| Iowa City | Cork,
30-Sep-25 |
| Iowa De Balme | Senonnes-Pouance,
09-Jul-25 |
| Iowa Hawkeye | Gawler,
25-Apr-22 |
| Iowa Hawkeye | Zia Park,
04-Nov-25 |
| Iowna | Launceston,
14-Oct-20 |
| Iowna Benz | Goulburn,
16-Oct-25 |
| Iowna Merc | Randwick,
01-Nov-25 |
| Iownaboy | Terang,
22-Mar-19 |
| Iowntheball | Leopardstown,
06-Jun-25 |
| Ioya Again | Presque Isle Downs,
24-Oct-25 |
| Ip Up | Carlisle,
02-Nov-25 |
| Ipanama | Le Lion D'angers,
07-Aug-23 |
| Ipanema Beach | Navan,
28-Aug-25 |
| Ipanema Flavor | Ohi,
20-Feb-25 |
| Ipanema Girl | Del Mar,
03-Dec-23 |
| Ipanema Princess | Horseshoe Indianapolis,
04-Nov-25 |
| Ipanema Queen | Dundalk,
11-Oct-25 |
| Iparla | Dax,
26-Jun-23 |
| Iperflyth | Craon,
03-Sep-23 |
| Ipheion | Hakodate,
28-Jun-25 |
| Iphiko | Turffontein,
06-Apr-24 |
| Iphimedia | Sunshine Coast,
03-May-25 |
| Iphis De L'aunay | Dieppe,
01-Sep-25 |
| Iphitos | Lyon-Parilly,
03-Sep-25 |
| Ipioga | William Hill Park Hillside,
23-May-12 |
| Ipnops | Charles Town,
27-Apr-24 |
| Ipocalypse Love | Caen,
29-Apr-23 |
| Ipolito | Palermo,
05-Sep-23 |
| Ipparock | Deauville,
12-Aug-23 |
| Ippatsu Gyakuten | Funabashi,
06-Jun-25 |
| Ippeisotsu | Saga,
17-Aug-25 |
| Ippin | Mizusawa,
24-Sep-24 |
| Ippling | Chantilly,
01-Sep-25 |
| Ippolito's Wonder | Mahoning Valley,
12-Nov-24 |
| Ippommichi | Funabashi,
03-Nov-25 |
| Ippone | Fontainebleau,
19-Apr-23 |
| Ippotheos | Wolverhampton,
10-Mar-24 |
| Ippy Girl | Gold Coast,
18-Jul-15 |
| Ipromiseyouthebeach | Horseshoe Indianapolis,
05-Oct-25 |
| Ipso Facto | Deauville,
07-Nov-25 |
| Ipso Facto | Turffontein,
27-Apr-24 |
| Ipso Facto Selecto | Sunshine Coast,
08-Jul-12 |
| Ipso Falco | Plumpton,
02-Apr-24 |