| Isalute | Scone,
29-Mar-22 |
| Isambard Brunel | Curragh,
16-Oct-25 |
| Isambard Kingdom | Beverley,
17-Sep-25 |
| Isamu Diamond | Niigata,
26-Oct-25 |
| Isamu Sanka | Kanazawa,
27-May-25 |
| Isamu Sutton | Mizusawa,
29-Aug-23 |
| Isana | Randwick,
01-Nov-25 |
| Isana | Chukyo,
02-Aug-25 |
| Isanuba | Penola,
06-Feb-11 |
| Isaready | Toowoomba,
11-Mar-23 |
| Isatis Des Touches | Vincennes,
28-Nov-23 |
| Isaurian | TRIAL Hawkesbury,
13-Dec-21 |
| Isavenger | Ipswich,
19-Jun-15 |
| Isayalittleprayer | Kempton,
29-Jan-23 |
| Isayisayboy | Lone Star Park,
02-Nov-25 |
| Isaynonono | TRIAL Murwillumbah,
27-Dec-24 |
| Isayso | Gulfstream,
01-Mar-24 |
| Isca | Compiegne,
13-Jun-23 |
| Iscariot | TRIAL Belmont,
08-Jul-24 |
| Ischia | Toulouse,
08-Apr-25 |
| Ischia | Southwell,
11-Jan-23 |
| Ischyro | Durbanville,
08-Oct-25 |
| Ischyros | Randwick,
04-Nov-25 |
| Isco | Racing.com Park Synthetic,
25-May-17 |
| Isco De Watou | La Capelle,
11-May-23 |
| Iscreamforicecream | Chantilly,
01-Sep-25 |
| Iscreamuscream | Santa Anita,
06-Oct-24 |
| Isdell | Mornington,
23-Oct-25 |
| Isdistheone | Clonmel,
06-Nov-25 |
| Ise Bay | Sonoda,
30-Jul-25 |
| Iseered Iseered | Belmont,
08-Jul-23 |
| Iseethemoon | Horseshoe Indianapolis,
29-Oct-25 |
| Isembrun | Auteuil,
20-Oct-23 |
| Isenay | Leopardstown,
26-Dec-23 |
| ISENIKENOFF | Ballarat,
10-May-12 |
| Isere | Devonport Tapeta Synthetic,
29-Jul-18 |
| Iseult | Chantilly,
01-Sep-25 |
| ISEULT | |
| Iseult Du Pacs | Dax,
20-May-25 |
| Iseult Of Ireland | Dundalk,
09-Nov-24 |
| Isfalia | La Teste De Buch,
29-Jun-24 |
| Isfand | Le Mans,
29-Oct-25 |
| Ishamashi | Dubbo,
02-Nov-24 |
| Ishan | Gowran Park,
16-Feb-25 |
| Ishani | Tamworth,
08-Jan-24 |
| Ishani | Chelmsford City,
10-Jan-25 |
| Ishbell | Geelong,
20-May-16 |
| Ishe Worth Agamble | Leicester,
09-Sep-25 |
| Ishi Classic | Grafton,
21-Sep-12 |
| Ishi Naughty | Beaudesert,
25-May-13 |
| ISHIEVER | Murray Bridge,
28-Mar-12 |
| Ishihara | Del Mar,
28-Aug-23 |
| Ishikari | Bathurst,
18-Aug-25 |
| Ishim | Tamworth,
09-Jun-23 |
| Ishimentor | Lingfield,
03-Sep-25 |
| Ishinca View | Kalgoorlie,
09-Jul-23 |
| Ishino Vivace | Saga,
18-Dec-23 |
| Ishipatchy | Murwillumbah,
25-Feb-14 |
| Ishiruby | Toowoomba Cushion Track,
09-Jul-13 |
| Ishiyaya | Woodbine,
30-Sep-23 |