| Sigfaðir frá Sibba |
3 YO grullo Icelandic Stallion |
Sónata |
| Signs of Fame |
1999 Chestnut Tobiano American Saddlebred Mare |
Maghara Arabians |
| Silfurtá frá Syndur |
13 YO Silver Dapple Icelandic Mare |
Syndur |
| Silver Feather |
2011 Bay (grey) Half-Arabian Mare |
Golden Rose Ranch |
| Sinful Genie K |
2023 Bay American Saddlebred Stallion |
Kiyo Performance Horses |
| Sirkus frá Ljóma |
0 YO Bay Icelandic Stallion |
Ljóma |
| Sjöfn frá Ponipallero |
18 YO Chestnut Icelandic Mare |
Syndur |
| Skallagrímur frá Ljóma |
3 YO black splashed white Icelandic Stallion |
Kadon Kartano |
| Skreppa frán Cajun |
2023 Chestnut Icelandic Stallion |
Cajun Cross Ranch |
| Skyfaxa |
2009 Grey Icelandic Mare |
Nereus Riding Center |
| Skylar Bint Adelmar RLF |
2004 Grey Arabian Mare |
Wrong Way Stud |
| Skylight Eros Gemini |
2018 bay Hackney Stallion |
Rueath Acres |
| Skylights Darkened Aftershock R |
2022 Chestnut Sabino Tennessee Walking Horse Stallion |
Golden Eagle Farm |
| SL Ansata Thee Starr |
2006 Grey Arabian Mare |
Whitewood Inc |
| Slodzik MP |
2000 Grey Arabian Mare |
Madrona Park |
| Slodziutki MP |
2005 Grey Arabian Mare |
Madrona Park |
| Slytherin Command BTH |
2022 Cremello Morgan Stallion |
Blackthorn Hills Farm |
| Smack Talk C |
2023 Bay Morab Mare |
Cajun Cross Ranch |
| Smento Ibn Sadika RLF |
2005 Bay Arabian Stallion |
Wrong Way Stud |
| Smith N Wesson VA |
2013 Bay American Saddlebred Stallion |
Quantum International |