| Name | Country | Region | Address |
|---|---|---|---|
| Western Stud | China | ||
| Western Stud | China | ||
| Westf | |||
| Wetjen D. | Germany | ||
| White Fox Farm | USA | ||
| White Rock Stables | USA | ||
| Whitham Thoroughbreds, LLC | USA | ||
| Wichrowa L.Ju. | Russia | S.-Peterburg | |
| WIeNER d.o.o. Visoko | |||
| Wijratsi, AO (Gagarina SChT) | Estonia |