Leading Broodmare Sires of 2018 Grade I Stakes Winners
(through 31 December 2018)
| Rank | Stallion | Sire | SWs |
| 1 | PIVOTAL | POLAR FALCON | 10 |
| 2 | UNBRIDLED'S SONG | UNBRIDLED | 6 |
| 3 | GALILEO | SADLER'S WELLS | 4 |
| 4 | DEPUTY MINISTER | VICE REGENT | 3 |
| FRENCH DEPUTY | DEPUTY MINISTER | 3 | |