| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Speak John | bay | c | 1958 | Prince John | Nuit de Folies | Thoroughbred | USA | |
| 4826-6 Speak Slowly | chestnut | f | 2010 | 985101045126155 | Dubawi | Blond Moment | Thoroughbred | Great Britain |
| Speak Straight | chestnut | f | 1987 | In Reality | Narrator Type | Thoroughbred | USA | |
| Speak Up | chestnut | f | 1997 | Unaccounted For | Lady Caveat | Thoroughbred | USA | |
| Speak Up Sailor | chestnut | f | 2012 | Midshipman | Speak Up | Thoroughbred | USA | |
| Speakerton | bay | c | 2002 | Spectrum | Kathy Desert | Thoroughbred | Ireland | |
| Spear | f | 1931 | Lord Wembley | Seaspear | Thoroughbred | Great Britain | ||
| Spear Lady | br. | f | 1931 | Lady Everton | Thoroughbred | Avstraliia | ||
| Spearfish | d.-bay | f | 1963 | Fleet Nasrullah | Alabama Gal | Thoroughbred | USA | |
| Spearmint | c | Thoroughbred | Kommaiak Farm |