Leading Sires of 2018 Grade I Stakes Winners
(through 31 December 2018)
| Rank | Stallion | Sire | Location | SWs |
| 1 | DEEP IMPACT | SUNDAY SILENCE | JPN | 7 |
| GALILEO | SADLER'S WELLS | IRE | 7 | |
| 3 | DUBAWI | DUBAI MILLENNIUM | ENG | 5 |
| MORE THAN READY | SOUTHERN HALO | KY | 5 | |
| QUALITY ROAD | ELUSIVE QUALITY | KY | 5 | |
| 6 | CANDY RIDE | RIDE THE RAILS | KY | 4 |
| FRANKEL | GALILEO | ENG | 4 | |
| 8 | CAMELOT | MONTJEU | IRE | 3 |
| ENGLISH CHANNEL | SMART STRIKE | KY | 3 | |
| HEART'S CRY | SUNDAY SILENCE | JPN | 3 | |
| HOLY ROMAN EMPEROR | DANEHILL | IRE | 3 | |
| INVINCIBLE SPIRIT | GREEN DESERT | IRE | 3 | |
| LORD KANALOA | KING KAMEHAMEHA | JPN | 3 | |