| Company name | Reg. code |
|---|---|
| HRUSTEK OÜ | 11190481 |
| TRUSTEK OÜ | 12632320 |
| TRUSTEK HOLDING OÜ | 16016380 |
| TRUSTEK EESTI OÜ | 14717747 |
| CRUSTER OÜ | 14532255 |
| THRUSTER OÜ | 17465743 |
| HOUSTEX OÜ | 12330398 |
| RUSTERK OÜ kustutatud | 11687320 |
| BRUSTER OÜ | 10203572 |
| VAUSTEK OÜ | 11659073 |
| TRESTEK OÜ | 12049891 |
| HOROSTEK OÜ | 10285535 |
| HAUSTEC OÜ | 12901903 |
| RUTSEK OÜ | 16480976 |
| KRUTEK OÜ | 17374963 |
| HUSTEC OÜ (former name Sildar Rent OÜ) | 14729992 |
| RESTEK OÜ | 14338292 |
| GUSTEK OÜ | 16093995 |
| TRUSTED FUTURES OÜ (former name Trusted Services Estonia OÜ) | 16149218 |
| TRUSTED SERVICES OÜ | 14306211 |
| TRUSTER GRUPP OÜ kustutatud | 11391759 |
| TRUSTED EBOOKS OÜ (former name ILRC Holding OÜ) | 14310483 |
| HAUSTER TRADE OÜ kustutatud | 10904808 |
| HAUSTEC EHITUSJÄRELEVALVE OÜ | 17071702 |
| IHE TRUSTEE OÜ kustutatud (former name Law OÜ) | 12724051 |
| FIN TRUSTED OÜ kustutatud | 12172232 |
| TRUSTER WALLET OÜ | 16008937 |
| ARISTEK EHITUS OÜ kustutatud | 11285218 |
| KRUSTOK MEDIA OÜ | 12694947 |
| HAUSTEC PROJEKTEERIMINE OÜ | 17380774 |
| TRUSTED CONSULTANCY OÜ | 16167630 |
| TRUSTED TECHNOLOGY OÜ kustutatud | 14602105 |
| RUSTIK NIKOLAJEV OÜ | 16879945 |
| ROSTEK TRANS OÜ | 11938459 |
| KÄRT ARUSTE OÜ | 17313683 |
| ERUSTE TALU OÜ | 12511450 |
| INTERNATIONAL SECURITY TRUSTEE OÜ kustutatud | 14740672 |
| TECH TRUSTED SYSTEMS OÜ kustutatud | 16558744 |
| RUSTE PROTECTION OÜ | 12551751 |
| ROSTEK EUROPE EST OÜ kustutatud | 11938726 |
| TRUSTEE CAPITAL MANAGEMENT IFN OÜ | 16883852 |
| ABLA DIAU OÜ kustutatud (former name OÜ AK Crystek) | 12262952 |