Leading Sires of 2020 Grade I Stakes Winners
(through 31 December 2020)
| Rank | Stallion | Sire | Location | SWs |
| 1 | GALILEO | SADLER'S WELLS | IRE | 9 |
| 2 | DEEP IMPACT | SUNDAY SILENCE | DEAD | 4 |
| DUBAWI | DUBAI MILLENNIUM | ENG | 4 | |
| TEOFILO | GALILEO | IRE | 4 | |
| 5 | INTO MISCHIEF | HARLAN'S HOLIDAY | KY | 3 |
| KINGMAN | INVINCIBLE SPIRIT | ENG | 3 | |
| LOPE DE VEGA | SHAMARDAL | IRE | 3 | |
| SHAMARDAL | GIANT'S CAUSEWAY | DEAD | 3 | |
| SIYOUNI | PIVOTAL | FRA | 3 | |
| SPEIGHTSTOWN | GONE WEST | KY | 3 | |
| VIOLENCE | MEDAGLIA D'ORO | KY | 3 | |
| WAR FRONT | DANZIG | KY | 3 | |