All Sim's oldest stock horse association.
| Name | Age | Color | Breed | Gender |
| Sheza Sweet Elite RL | 2010 | Bay Roan | Quarter Horse | Mare |
| Sheza Tiny Gunner | 2015 | Dun Tobiano | Paint | Mare |
| Sheza Zippin Chip | 2003 | Chestnut | Quarter Horse | Mare |
| ShezPlentyTimelessRL | 2010 | Bay Roan Tobiano | Paint | Mare |
| Shifty Eyes | 2008 | Chestnut Leopard | Appaloosa | Stallion |
| Shine On Sugar | 1993 | Palomino | Quarter Horse | Mare |
| Shiners Lena Rey | 1998 | Bay | Quarter Horse | Mare |
| Shines At Night FS | 2002 | Black Overo | Paint | Mare |
| Shines Top Rock | 1997 | Sorrel Splash Overo | Paint | Stallion |
| Shinin By | 1993 | Palomino | Quarter Horse | Mare |
| Shining Catalyst OK | 2016 | Perlino | Paint | Stallion |
| Shining Lena | 2003 | Bay | Quarter Horse | Stallion |
| Shining Maid | 1994 | Palomino | Quarter Horse | Mare |
| Shining Sugar Breeze | 2014 | Black Overo | Paint | Stallion |
| Shinning Chex | 2007 | Palomino | Quarter Horse | Mare |
| Shiny Lil Pistol FS | 2008 | Red Roan Overo | Paint | Mare |
| Shiny Little Rocker FS | 2007 | Red Dun Splash Overo | Paint | Stallion |
| Shipwreck Ahead RY | 2013 | Bay Tobiano | Paint | Stallion |
| Shivers Soul Sister GN | 2003 | Black | Quarter Horse | Mare |
| Sho Stoppin Maid | 2002 | Buckskin Blanket | Appaloosa | Mare |
| Shock And Awe FS | 2008 | Black | Quarter Horse | Mare |
| Shootin Starlight | 2009 | Chestnut Leopard | Appaloosa | Mare |
| Shop The Mall | 2012 | Chestnut | Quarter Horse | Mare |
| Short And Sweet | 2000 | Chestnut Frame Overo | Paint | Stallion |
| Shotgun Rider | 2012 | Buckskin | Quarter Horse | Stallion |
| ShowAtHighNoon | 2006 | Few Spot | Appaloosa | Stallion |
| Showing Off My Spots AES | 2015 | Chestnut Fewspot | Appaloosa | Mare |
| Shrew Bite | 2002 | Flaxen Liver Chestnut Sabino | Mustang | Mare |
| Shy Kiss | 2001 | Bay | Quarter Horse | Mare |
| Shyanne | 2010 | Black Sabino | Mustang | Mare |
| Sign Me Up | 2012 | Black Few Spot | Appaloosa | Mare |
| Sign Up | 1996 | Chestnut | Quarter Horse | Mare |
| Signed with Honor Wv | 2013 | Buckskin | Quarter Horse | Mare |
| Signed With Love | 2012 | Bay Tobiano | Paint | Stallion |
| SigningAllTheTimeRLF | 2013 | Bay Blanket | Appaloosa | Mare |
| Silent Firefly | 2009 | Bay Tobiano | Paint | Mare |
| Silently Skippin K | 2024 | Palomino Overo | Paint | Mare |
| Silk Left Prints | 2007 | Black Tobiano | Paint | Mare |
| Silk Spot | 1994 | Bay Blanket | Appaloosa | Mare |
| Silva Doc Jerico Wv | 2009 | Black Tobiano | Paint | Mare |
| Silver Blue | 2006 | Grullo Tobiano | Paint | Mare |
| Silver Cash | 2003 | Blue Roan Tobiano | Paint | Mare |
| Silver Fleck FS | 2006 | Red Roan | Quarter Horse | Mare |
| Silver Glo GE | 2013 | Bay Roan | Quarter Horse | Mare |
| Silver Rose SF | 2009 | Bay Overo | Paint | Mare |
| Silver Storm | 2010 | Grey | Mustang | Mare |
| Silver Twist ZPE | 1997 | Grey | Quarter Horse | Mare |
| Silver Zip Platinum | 2001 | Grey Overo | Paint | Stallion |
| Silverrace OK | 2014 | Red Dun | Quarter Horse | Stallion |
| Silvertonne | 2005 | Grey | Quarter Horse | Stallion |
| Simple Investment | 2007 | Bay | Quarter Horse | Stallion |
| Simply Fatal | 2002 | Bay | Quarter Horse | Stallion |
| Simply Inviting | 2010 | Black | Quarter Horse | Mare |
| Simply Lopin | 2015 | Black Roan | Quarter Horse | Mare |
| Simply Obsessed | 2002 | Black | Quarter Horse | Mare |
| Sin With Me FS | 2013 | Palomino | Quarter Horse | Stallion |
| Sinful Art | 2013 | Black | Quarter Horse | Mare |
| Sinful Intentions | 2011 | Gray Sabino Overo | Paint | Mare |
| Singin Dixie FS | 2007 | Chestnut | Quarter Horse | Stallion |
| Sir Dash Bar | 2002 | Sorrel | Quarter Horse | Stallion |
| Sir Tom Wv | 2008 | Palomino | Quarter Horse | Stallion |
| Sirtainly a Tune PS | 2008 | Sorrel Overo | Paint | Mare |
| Sirtainly An Art | 2005 | Sorrel Tobiano | Paint | Mare |
| Sissy Brat | 1998 | Silver Bay | Australian Stock Horse | Mare |
| Six Feet Under the Wind OK | 2013 | Red Dun | Quarter Horse | Stallion |
| Six Pack Summer | 2005 | Buckskin Roan | Quarter Horse | Stallion |
| Sixes Valentine | 2009 | chestnut | Quarter Horse | Mare |
| Sizzlin In Blue | 1992 | Blue Roan | Pony of America | Stallion |
| Skip A Letter WF | 2003 | Buckskin Blanket | Appaloosa | Stallion |
| Skip Along Guy | 1995 | Chestnut Overo | Paint | Stallion |
| Skip By Hickory WF | 2004 | Bay | Quarter Horse | Mare |
| Skip Merry Bar | 2000 | Chestnut | Quarter Horse | Mare |
| Skip My Assets Wv | 2011 | Palomino | Quarter Horse | Mare |
| Skip The Party WF | 2004 | Black Tovero | Paint | Mare |
| Skip The Teasing PI | 2007 | Chestnut Blanket | Appaloosa | Mare |
| Skipa Splash | 2001 | Chestnut Overo | Paint | Stallion |
| Skippa Whiz Kid | 2001 | Dunskin | Quarter Horse | Stallion |
| Skipper Speed for Money | 2005 | Chestnut | Quarter Horse | Stallion |
| Skippers Flame Remedy | 2006 | Buckskin | Quarter Horse | Mare |
| Skippers Passion Twist | 2008 | Grey | Quarter Horse | Stallion |
| Skippin A Beat | 1996 | Grey | Quarter Horse | Mare |
| Skippin Destiny ZPE | 2009 | Black | Quarter Horse | Mare |
| Skippin Stars AES | 2002 | Chestnut | Quarter Horse | Mare |
| Skippity Do Da ZPE | 2002 | Palomino | Quarter Horse | Mare |
| Skips Klassic Kandi | 2004 | Classic Champagne Tobiano | Paint | Stallion |
| Skips Little Copper | 2013 | Chestnut Tobiano | Paint | Stallion |
| Skips Silent Cowgirl | 1997 | Buckskin | Quarter Horse | Mare |
| Skulk n Sneak QHA | 2023 | Red Roan | Quarter Horse | Mare |
| Sky Dancer | 1994 | Grey | Quarter Horse | Stallion |
| Sky Lark | 2005 | Sorrel | Mustang | Stallion |
| Skybound Krymsun ST | 2011 | Bay | Quarter Horse | Mare |
| Skys Not Blue | 2000 | Bay | Quarter Horse | Mare |
| SLE Decadence | 2006 | Palomino Roan Overo | Paint | Mare |
| SLE Seven Lions | 2008 | Dun Tovero | Paint | Stallion |
| Sleeping Beauty | 2014 | Palomino | Quarter Horse | Mare |
| Sleepwalker | 2009 | Palomino | Quarter Horse | Stallion |
| Sleepy Moon | 2005 | Black Tobiano | Paint | Mare |
| Sleepy River | 2000 | Brown | Mustang | Mare |
| Sleigh Bells GE | 2010 | Buckskin Overo | Mustang | Stallion |
| Slide The Joker | 2008 | Bay Roan Tobiano | Paint | Stallion |
| Slight of Hand | 2013 | Bay | Quarter Horse | Mare |
| Slushie Teacup | 2024 | Liver Chestnut Leopard | Appaloosa | Mare |
| Sly Lil Sky K | 2024 | Buckskin | Quarter Horse | Stallion |
| Sly Little Hick | 2009 | Palomino | Quarter Horse | Mare |
| Small Town Hero E | 2013 | Palomino Dun | Quarter Horse | Stallion |
| Smart Cat Chex Wv | 2012 | Palomino | Quarter Horse | Mare |
| Smart Cat Strut Wv | 2005 | Sorrel | Quarter Horse | Mare |
| Smart Colonel | 2010 | Chestnut Splashed-White Overo | Paint | Mare |
| Smart Like A Cat | 2002 | Sorrel | Quarter Horse | Mare |
| Smart Like Nu | 2005 | Sorrel | Quarter Horse | Mare |
| Smart Like Quixote FS | 2016 | Bay | Quarter Horse | Mare |
| Smart Lil Amigo Wv | 2012 | Dunalino Tobiano | Paint | Mare |
| Smart Lil Mista | 2009 | Sorrel Tobiano | Paint | Stallion |
| Smart Little Cataton | 2007 | Palomino | Quarter Horse | Mare |
| Smart Little Frosty | 1992 | Grey | Quarter Horse | Mare |
| Smart Little Jinx | 2002 | Blue Roan Few Spot | Appaloosa | Mare |
| Smart Little Playgirl | 1996 | Bay | Quarter Horse | Mare |
| Smart Little Skeet | 1998 | Sorrel Rabicano | Quarter Horse | Mare |
| Smart Little Spark | 2001 | Red Roan | Quarter Horse | Mare |
| Smart Little Star | 2004 | Sorrel Rabicano | Quarter Horse | Stallion |
| Smart Mastercard | 2011 | Blue Roan Tobiano | Paint | Mare |
| Smart Melody | 2006 | Palomino | Quarter Horse | Mare |
| Smart N Sugar Boy AC | 2011 | Bay Tobiano | Paint | Stallion |
| Smart N Tuf | 2005 | Buckskin Tobiano | Paint | Stallion |
| Smart Sailor | 1999 | Bay | Quarter Horse | Stallion |
| Smart Sox FS | 2011 | Chestnut | Quarter Horse | Mare |
| Smart Spark AE | 2014 | Palomino | Quarter Horse | Mare |
| Smart Sport FS | 2009 | Bay | Quarter Horse | Stallion |
| Smart Sunburst FS | 2005 | Palomino | Quarter Horse | Mare |
| Smart Swing | 2001 | Chestnut | Quarter Horse | Mare |
| Smartest Fox FS | 2007 | Blue Roan | Quarter Horse | Stallion |
| Smartie Lynx | 2001 | Palomino | Quarter Horse | Mare |
| Smoke N Mirrors AES | 2010 | Blue Roan Tobiano AES | Paint | Stallion |
| Smoke N Thunder | 1998 | Classic Champagne | Quarter Horse | Stallion |
| Smoke With Me My Lady Tb | 2014 | Chestnut Overo | Paint | Mare |
| Smoken Dreamer | 1999 | Black Overo | Paint | Mare |
| Smokes Foxy Maiden | 2012 | Bay Tovero | Paint | Mare |
| Smokey Jet Thunder | 1999 | Bay Overo | Paint | Stallion |
| Smokey Night Affair | 2004 | black | Quarter Horse | Stallion |
| Smokey Pine Bar GE | 2010 | Black Overo | Paint | Mare |
| Smokin Cherokee | 1999 | Bay Tobiano | Paint | Stallion |
| Smokin Crush FS | 2012 | chestnut overo | Paint | Stallion |
| Smokin Moon AE | 2016 | Bay Tobiano | Paint | Mare |
| Smokin Playboy | 2001 | Bay | Quarter Horse | Stallion |
| Smokin Robin | 2009 | Black Frame Overo | Paint | Mare |
| Smokin Rockette | 1997 | Chestnut Tobiano | Paint | Mare |
| Smokin Sammy | 2004 | Red Dun | Quarter Horse | Mare |
| Smokin San Dell | 2005 | Dun | Quarter Horse | Stallion |
| Smokin Silver Lining | 2011 | Smokey Black Tovero | Paint | Mare |
| Smoking Coconut | 2016 | Brown | Quarter Horse | Mare |