- Winn Ranches
- Winner Haven Farm Inc
- Winnermaker Farm
- Winners International Farm
- Winning Gait Farms
- Winning Ways Farm
- Winning Ways Mare Farm
- Winning Ways Mare Farm
- Winridge Farm Quarter Horses
- Winsdown Farms
- Winter Quarter Farm
- Winter Quarter Farm
- Winter Quarter Farm
- Winter Rose Ranch
- Wintergreen Farm
- Wintergreen Stallion Station
- Withrow Way Farm
- Wolfsong Arabians
- Womack Stables
- Wood-Mere Farm Inc
- Woodburn Farm
- Woodcreek Arabians
- Woodcrest Inc
- Woods Edge Farm
- Woods Edge Farm
- Woods Edge Farm
- Woodsprings Farm
- Woodstock Farm
- Woodwind Farm
- World Champion Products
- World Class Miniature Horse
- World Equine Productions
- World Foundation Quarter Horse
- WULF Arabian Farm
- Wyammy Quarter Horse Ranch
- Wychwood Farm
- Xtreme Image Arabians
- Y-O Equine Ranch
- Yellow Creek Paints
- York Bloodstock
- Zylstras' Friesians
