| Name | Country | Region | Address |
|---|---|---|---|
| Sumarokova Natalya Lvovna | Russia | ||
| Sumarokova Tatyana Viktorovna | Russia | Rostov region | |
| Sumatokhin Yury Aleksandrovich | Russia | Cheliabinsk region | |
| Sumatorin Yury Aleksandrovich | Russia | Cheliabinsk region | |
| Sumbulowo | Russia | Ryazan region | |
| Sumchenko Roman Sergeevich | Russia | Белгородская область | |
| Sumina Yekatyerina Dmitrievna | Russia | Moscow region | |
| Summer Bird Syndicate & Chad Austin Reed | USA | ||
| Summer Wind Equine LLC | USA | ||
| Sumskaya gosplemstantsya | Russia |