| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Sword Play | f | Thoroughbred | ||||||
| Sword Sworn | c | 1969 | Worden 2 | Segera | Thoroughbred | France | ||
| Swordsman | bay | c | 1796 | Prizefighter | Thoroughbred | Ireland | ||
| Swynford | d.-bay | c | 1907 | John O'Gaunt | Canterbury Pilgrim | Thoroughbred | Great Britain | |
| Sybarit | chestnut | c | 1879 | Thoroughbred | Austria | |||
| Sybarite | bay | f | 1969 | Royal Record | Pampered | Thoroughbred | Great Britain | |
| Sybella | chestnut | f | 2003 | In the Wings | Samara | Thoroughbred | Great Britain | |
| Sybil | chestnut | f | 1885 | Thoroughbred | Great Britain | |||
| Sybil Brand | f | Thoroughbred | ||||||
| Sybil's Niece | chestnut | f | 1951 | Admiral's Walk | Sybil's Sister | Thoroughbred | Great Britain |