| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| The Spell is Gone | d.-bay | f | 1998 | Gone West | Stormy Spell | Thoroughbred | USA | |
| The Sphynx | bay | f | 1865 | Newminster | Madame Stodare | Thoroughbred | Great Britain | |
| The Squaw II | d.-bay | f | 1939 | Sickle | Minnewaska | Thoroughbred | France | |
| The Star | grey | f | 1843 | Bay Middleton | Cervantes mare | Thoroughbred | Great Britain | |
| The Steamer | br. | c | 1834 | Emilius | Valve | Thoroughbred | Great Britain | |
| The Steamer mare | f | 1841 | The Steamer | Motley | Thoroughbred | Great Britain | ||
| The Stork | bay | f | 1976 | Club House | Cryhelp | Thoroughbred | ||
| The Story | chestnut | c | 1906 | Sundridge | Sweet Story | Thoroughbred | Great Britain | |
| The Strid | bay | f | 1893 | Thoroughbred | Great Britain | |||
| The Swan | bay | f | 1877 | Sterling | Leda | Thoroughbred | Great Britain |