| Company name | Reg. code |
|---|---|
| OSTOM OÜ | 11642322 |
| OSTOM ARVESTUS OÜ | 10376216 |
| OSTOV KNT OÜ | 11371509 |
| OSSOM OÜ | 16422861 |
| ESTOM OÜ | 12268096 |
| USTOM PUIT OÜ kustutatud | 10299454 |
| ESTOM WORKS OÜ kustutatud | 12656800 |
| ASTOM-T OÜ kustutatud (former name MOTOTRADE PROJECTS OÜ) | 12877889 |
| STOM-E OÜ kustutatud | 16504688 |
| STOM KVA OÜ | 17382661 |
| BOSTOM CONSULTING GROUP OÜ | 16508634 |
| DENT4COM OÜ (former name Stom-e World OÜ) | 17006685 |
| FONTEREKS GRUPP OÜ (former name Laxor Est OÜ) | 10030999 |