| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| The Schemer | br. | f | 1934 | Challenger II | Granny | Thoroughbred | USA | |
| The Scottish Chief | bay | c | 1861 | Lord of the Istles | Miss Ann | Thoroughbred | Great Britain | |
| The Scout | d.-bay | c | 1927 | Sir Gallahad III | Thoroughbred | USA | ||
| The Scribbler | br. | c | 1926 | Buchan | Thoroughbred | Great Britain | ||
| The Sea King | bay | c | 2022 | 643090000561770 | 1968-8 Mavic | 5646-7 Zichi | Thoroughbred | Mr Litovkin M.I. |
| The Slave | bay | f | 1852 | Melbourne | Volley | Thoroughbred | Great Britain | |
| The Sleeping Beauty | bay | f | 1881 | The Beauty | Thoroughbred | Ireland | ||
| The Snob | c | 1963 | High Hat | Wallflower | Thoroughbred | Great Britain | ||
| The Solicitor II | d.-bay | c | 1941 | Fair Trial | Thoroughbred | Great Britain | ||
| The Spaniard | bay | c | 1907 | St. Simon | Love True | Thoroughbred | Great Britain |