All Sim's oldest stock horse association.
| Name | Age | Color | Breed | Gender |
| Speeding Conscience OK | 2016 | Chestnut Spotted Blanket | Appaloosa | Stallion |
| Speeding Ticket | 2000 | Bay Roan | Appaloosa | Mare |
| SpeedThang | 2003 | Black | Quarter Horse | Stallion |
| SPF AStreakofBling | 2013 | Bay Roan | Quarter Horse | Mare |
| SPF Bugs Firin Kit | 2008 | Buckskin | Quarter Horse | Stallion |
| SPF Dr Bug Leo | 2007 | Chestnut | Quarter Horse | Stallion |
| SPF Martha James | 2013 | Chestnut | Quarter Horse | Mare |
| Spice | 2001 | Grulla | Mustang | Mare |
| Spin On Sinister | 2009 | Brown | Quarter Horse | Mare |
| Splashin Lark FS | 2008 | Palomino | Quarter Horse | Stallion |
| Splashs Ramblin Jackie | 1996 | Black | Quarter Horse | Mare |
| Spooked By Whiz | 2010 | Bay Splashed-White Overo | Paint | Mare |
| Spookn Dual Six | 2008 | Chestnut | Quarter Horse | Stallion |
| Spooks Trophy Wife | 1997 | Chestnut Tobiano | Paint | Mare |
| Spooky Diamond | 2008 | perlino tobiano | Paint | Mare |
| Sportin A Shiner | 2018 | Cremello | Quarter Horse | Stallion |
| Spot This Cactus | 2013 | Splash White Tobiano | Paint | Mare |
| Spotlight | 2001 | Chestnut | Quarter Horse | Mare |
| Spotted Moment HS | 2017 | Buckskin Leopard | Appaloosa | Mare |
| Squawking Luke QHA | 2025 | Chestnut Pearl | Quarter Horse | Stallion |
| SR Little Texas Sky | 2010 | Bay | Quarter Horse | Mare |
| SR Pine Bars Dunit | 2018 | Dunskin Blanket | Appaloosa | Mare |
| SRI Queens Supreme | 1990 | Red Dun Overo | Paint | Mare |
| SRI Skippa Star Bar | 1993 | Sorrel | Quarter Horse | Mare |
| SRI Zan Badger Star | 2001 | Chestnut | Quarter Horse | Mare |
| SS Bonedance | 2006 | Black Tobiano | Paint | Stallion |
| SS Impressive Player | 2000 | Chestnut | Quarter Horse | Gelding |
| SS Rebel Wind | 2000 | Smoky Blue Roan | Quarter Horse | Stallion |
| SSF Impulsive Scotch | 2007 | Chestnut Tovero | Paint | Stallion |
| Stand At Night ZPE | 2001 | Bay Blanket | Appaloosa | Stallion |
| Standing Without Rythm | 2008 | Black Blanket | Appaloosa | Stallion |
| Starfire Dun It Dont Care | 2017 | Bay Leopard | Paint Pony | Mare |
| Starfire Fading Empire | 2017 | Chestnut Leopard | Paint Pony | Mare |
| Starfire Red Dirt Road | 2016 | Bay Snowcap | Paint Pony | Mare |
| Starfire Sending Glory | 2010 | Palomino Leopard | Paint Pony | Mare |
| Starlight Bar AES | 2014 | Buckskin | Quarter Horse | Mare |
| Starlight Boogie AES | 2018 | Chesnut Varnish Roan | Appaloosa | Mare |
| Starlight Deuce FS | 2004 | Bay | Quarter Horse | Mare |
| Starlight Doc | 2000 | Chestnut | Quarter Horse | Stallion |
| Starlight Olena | 1997 | Bay | Quarter Horse | Stallion |
| Starlit Brow | 2014 | Sorrel | Quarter Horse | Stallion |
| Starry Gold VF | 2015 | Palomino | Quarter Horse | Mare |
| Stars An Stripes | 2000 | Chestnut | Quarter Horse | Mare |
| Stars Clever Queen | 2011 | Bay Blanket | Appaloosa | Mare |
| Stars N Stripes | 2009 | chestnut overo | Paint | Mare |
| Stars Outta Range | 2015 | Red Roan | Quarter Horse | Mare |
| Static Return VA | 2012 | Sorrel Sabino | Paint | Stallion |
| Stay Alive HS | 2015 | Bay Overo | Paint | Stallion |
| Stayin Alive | 2002 | Bay | Quarter Horse | Mare |
| Staying Cool | 1997 | Sorrel | Pony of America | Mare |
| Steamboat Cooki AE | 2014 | Bay | Quarter Horse | Mare |
| Steele Parr FS | 2002 | Bay Overo | Paint | Stallion |
| Step In Time | 2004 | Black Tobiano | Paint | Mare |
| Step It Up | 1998 | Palomino | Quarter Horse | Mare |
| Stepped In Lillies | 2000 | Sorrel Tobiano | Paint | Mare |
| Steppin Late OK | 2017 | Perlino Tobiano | Paint | Mare |
| Steppin Up | 1998 | Red Dun | Quarter Horse | Mare |
| Steps to Pose R | 2017 | Smoky Grullo | Quarter Horse | Mare |
| Stitched Up RY | 2016 | Bay | Quarter Horse | Stallion |
| Stolen Candy FE | 2015 | bay | Quarter Horse | Mare |
| Stolen Work ZPE | 2006 | Chestnut | Quarter Horse | Stallion |
| Stone of a Bullet OK | 2020 | Solid red Dun | Paint | Stallion |
| Stop The Darkness AES | 2009 | Black Leopard | Appaloosa | Stallion |
| Storm Chaser | 2008 | Buckskin Blanket | Appaloosa | Stallion |
| Straight Shootin Gunny | 2005 | Bay Tobiano | Paint | Stallion |
| Strangers | 2013 | Dunalino Overo | Paint | Stallion |
| Straw Hat Maid | 2009 | Sorrel Snowcap | Appaloosa | Mare |
| Strawberry Lena | 1988 | Sorrel Sabino Overo | Paint | Mare |
| Streak Of Luck | 2007 | Bay Roan Tobiano | Paint | Stallion |
| Streakin Devil R | 2014 | Black | Quarter Horse | Stallion |
| Streakin Josey Boon | 2005 | Bay Roan | Quarter Horse | Mare |
| Streakin Moon | 2009 | Sorrel | Quarter Horse | Mare |
| Streke on My Watch ZPE | 2008 | Black Tobiano | Paint | Stallion |
| String Of Attraction | 2015 | Chestnut Blanket | Appaloosa | Stallion |
| Stroke of Time | 2007 | Bay Overo | Paint | Mare |
| Strutin Good Zippo | 2008 | Chestnut Roan | Quarter Horse | Mare |
| Stunning Stuper Starr | 2001 | Chestnut Blanket | Appaloosa | Gelding |
| Style By Chocolate | 1997 | Grulla | Quarter Horse | Mare |
| Styled For You ZPE | 2001 | Buckskin Tobiano | Paint | Stallion |
| StylesExtremeLace RL | 2007 | Black Tobiano | Paint | Mare |
| Stylish Dee | 2012 | Palomino Roan Overo | Paint | Mare |
| Stylish Hustler FS | 2007 | Sorrel | Quarter Horse | Stallion |
| Stylish Kid | 2015 | Buckskin | Quarter Horse | Mare |
| Stylish Lil Krymsun ST | 2010 | Bay Tobiano | Paint | Mare |
| Stylish Playboy | 1995 | Sorrel | Quarter Horse | Stallion |
| Stylish Sonny Dee | 2011 | Chestnut Tovero | Paint | Stallion |
| Stylishly Tardee | 2008 | Palomino | Quarter Horse | Stallion |
| Styx | 2013 | Bay | Quarter Horse | Stallion |
| Suave Mister EF | 2011 | Black | Quarter Horse | Stallion |
| Suchafastone | 2008 | Bay Tovero | Paint | Mare |
| Suchomimus QHA | 2025 | Grey | Quarter Horse | Stallion |
| Sudden Applause ST | 2007 | Chestnut Blanket | Appaloosa | Mare |
| Sudden Machine | 2011 | Bay | Quarter Horse | Mare |
| Sudden Signs | 2004 | Red Roan | Quarter Horse | Mare |
| Sudden Victory AES | 2004 | Palomino | Quarter Horse | Mare |
| Suddenly Chipped | 1999 | Palomino | Quarter Horse | Mare |
| Suddenly Cool Robin | 2008 | Chestnut | Quarter Horse | Mare |
| Sugar | 2000 | Grulla | Mustang | Mare |
| Sugar Buck Wv | 2011 | Buckskin | Quarter Horse | Stallion |
| Sugar Capitol Wv | 2006 | Black Leopard | Quarter Horse | Stallion |
| Sugar Rush ZPE | 2005 | Black Sabino | Paint | Mare |
| Summer Fling | 2006 | Buckskin | Quarter Horse | Mare |
| Summer Sham | 2011 | Chestnut Roan Few Spots | Colorado Ranger | Mare |
| Summertime Sadness | 2021 | Buckskin Tobiano | Paint | Mare |
| Sundance Kid FS | 2012 | Black Tovero | Paint | Stallion |
| Sunkissed Prince ZPE | 2009 | Bay | Quarter Horse | Stallion |
| Sunny Day | 2002 | Palomino | Quarter Horse | Mare |
| Sunny Wolferina | 2000 | Red Roan | Quarter Horse | Mare |
| Sunsets Golden Shiver GN | 1995 | Palomino | Quarter Horse | Stallion |
| Super Lil Bijou | 2004 | Buckskin | Quarter Horse | Mare |
| Supreme Two Cee FS | 2013 | Palomino | Quarter Horse | Mare |
| Surely A GoldBar | 2002 | Red Dun | Quarter Horse | Mare |
| Surely An Okie E | 2013 | Sorrel | Quarter Horse | Mare |
| Surely Im Fyre FI | 2023 | Chestnut Frame Overo | Paint | Stallion |
| Suzi Q | 1999 | Black Overo | Mustang | Mare |
| Sven Whizor VF | 2011 | Red Dun Snowcap | Appaloosa | Stallion |
| Swag Blues E | 2013 | Bay Roan | Quarter Horse | Stallion |
| Sweet Down Catt | 2012 | Bay | Quarter Horse | Mare |
| Sweet Hollywood LH | 2015 | Chestnut | Quarter Horse | Stallion |
| Sweet N Rowdy Wv | 2011 | Bay Blanket | Appaloosa | Stallion |
| Sweet N Smart Wv | 2014 | Black | Quarter Horse | Stallion |
| Sweet Silence | 1999 | Dun Overo | Paint | Mare |
| Sweet Snapper FS | 2007 | Sorrel Overo | Paint | Mare |
| Sweethearts First | 2008 | Bay Blanket | Paint Pony | Mare |
| SweetLookinFactor RLF | 2010 | Black Tobiano | Paint | Mare |
| SweetSouthernGold RLF | 2013 | Palomino Blanket | Appaloosa | Mare |
| SweetTalkinElite RL | 2009 | Bay Roan | Quarter Horse | Mare |
| SWH Do Not Escape | 2011 | Liver Chestnut | Quarter Horse | Mare |
| Swift Leanin Breeze FS | 2012 | Bay | Quarter Horse | Mare |
| Swift Little Miss FS | 2008 | Red Roan | Quarter Horse | Mare |
| Ta Renzo | 2010 | Bay | Quarter Horse | Mare |
| Take A Hit UA | 2015 | Palomino Snowflake | Appaloosa | Mare |
| Takin the Cartel | 2012 | Sorrel | Appaloosa | Stallion |
| TapOut | 1997 | Buckskin Blanket | Appaloosa | Mare |
| Tardee Imposter FS | 2003 | Bay Roan | Quarter Horse | Mare |
| Tardee Speaker | 2006 | Chestnut Blanket | Paint Pony | Mare |
| Tari Darlin | 1995 | Bay | Quarter Horse | Mare |
| Tari Plaything FS | 2009 | Bay | Quarter Horse | Mare |
| Tattered Artifacts | 2008 | Chestnut Overo | Paint | Stallion |
| Te Intensions | 2015 | Sorrel | Quarter Horse | Mare |
| Te Pretty Secret | 2009 | Sorrel | Quarter Horse | Mare |
| Teatime Is Over | 2011 | Chestnut | Quarter Horse | Stallion |
| Tejons Peppy Boo | 1995 | Chestnut | Quarter Horse | Mare |
| Tellin Secrets | 2003 | Bay | Quarter Horse | Mare |
| TemptedByFineThings AE | 2007 | Roan Overo | Paint | Mare |
| Test Horse | 2019 | |||
| Texas Assets | 1998 | Red Dun Overo | Paint | Stallion |
| Texas Treasure Wv | 2005 | Bay Tobiano | Paint | Mare |
| Thanks To Aunt Vee | 2003 | chestnut roan | Quarter Horse | Mare |
| That Soxy Twister FS | 2009 | Grey | Quarter Horse | Mare |