| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Split the Arrow | d.-bay | f | 1999 | Smart Strike | Radiant Ring | Thoroughbred | Canada | |
| Splitting Spring | bay | f | 2003 | Langfuhr | Host of Angels | Thoroughbred | USA | |
| Splosh | bay | f | 1974 | Silly Season | Dolphinet | Thoroughbred | Great Britain | |
| 6829-8 Spodvizhnitsa | bay | f | 2019 | 643090000419891 | 1570-7 Danceflyer | 4495-6 Snazzi | Thoroughbred | Progress Stud |
| Spogad | chestnut | c | 1971 | 2397 Gugenot | 3065 Sakhara | Thoroughbred | Streletsk Stud | |
| 7888 Spogiya | bay | f | 1976 | 3136 Paladin | 3065 Sakhara | Thoroughbred | Streletsk Stud | |
| Spoiled Lady | bay | f | 1989 | Graustark | Pout | Thoroughbred | USA | |
| Spokeswoman | grey | f | 2006 | Unbridled's Song | Key Phrase | Thoroughbred | USA | |
| Spoliation | chestnut | f | 1886 | Reverberation | Thoroughbred | Great Britain | ||
| 3815-1 Sponsor | black | c | 1989 | 3400-1 Pakt | 5736-1 Sluzhba | Thoroughbred | Labinsk Stud |