| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| 840 Sudden Sally | bay | f | 1927 | Swynford | Thoroughbred | Great Britain | ||
| Sudden Storm Bird | bay | f | 1992 | Storm Bird | Fabulous Salt | Thoroughbred | USA | |
| Suddenly Course | chestnut | c | 2008 | Lion Heart | Sabindy | Thoroughbred | USA | |
| Sudenlylastsummer | bay | f | 1997 | Rinka Das | Sally Lunn | Thoroughbred | USA | |
| 1126-3 Sudoma | chestnut | f | 1998 | 3750-1 Dotsero | 6753-1 Svir | Thoroughbred | Kavkaz-International Stud | |
| 0257-3 Sudtag | bay | c | 1997 | 3538-1 Kris Kringle | 7458-1 Biara | Thoroughbred | Erdan Farm | |
| 2496 Sudzha | chestnut | f | 1948 | 1917 Ex Szamuraj | 1150 Zhizel | Thoroughbred | Onufrievsk Stud | |
| Sudzha | bay | f | 1971 | 3065 Gambrinus | 4024 Sena | Thoroughbred | Voskhod Stud | |
| 2658-4 Sue Allen | bay | f | 2000 | Pennekamp | Jambo Jambo | Thoroughbred | Ireland | |
| Sue Babe | bay | f | 1978 | Mr. Prospector | Sleek Dancer | Thoroughbred | USA |