| Company name | Reg. code |
|---|---|
| SIXU6 OÜ | 16913435 |
| STAGE SIX OÜ | 17260981 |
| SIX APPLES OÜ | 10471692 |
| SIX TELECOM OÜ | 11405125 |
| SIX LOGISTICS OÜ kustutatud (former name SIX Logistics UÜ) | 12886776 |
| SIX SENSES OÜ | 14003976 |
| E2SIX OÜ | 17178788 |
| FLAT SIX OÜ | 17026831 |
| SIX IT OÜ (former name Rüüsöödi Talu OÜ) | 12449981 |
| SIX SLIVOVICE OÜ | 12320193 |
| SIX SEASONS OÜ | 16942833 |
| FORTY-SIX INTERNATIONAL OÜ kustutatud | 12249710 |
| SIX APPLES FINANCE OÜ | 11714234 |
| THIRTY SIX DEGREES OÜ | 14679124 |
| SIX SENSE ANIMAL BEHAVIOR CONSULTING OÜ kustutatud | 16623068 |
| SUN AND STARS OÜ (former name Six Five Two OÜ) | 14863466 |
| MIMAKIKOKI GONDODELE OÜ (former name OÜ BIG SIX Holdings) | 14039922 |
| DANKUSILAME SUTUMAMUANTE OÜ (former name OÜ EstNord Tankers) | 12201301 |
| SISU OÜ | 14405210 |
| SIMU OÜ | 11521044 |
| SINU24 OÜ | 14705141 |
| SISU OÜ kustutatud | 12132511 |
| SINU OÜ (former name Ceriqum OÜ) | 16909089 |
| SIKU OÜ | 14331775 |
| SIKU OÜ kustutatud | 10097147 |
| KIXU OÜ kustutatud | 11279695 |
| PIXU OÜ | 17404664 |
| SIFU OÜ (former name OÜ Stingray) | 11192787 |
| SIU OÜ | 11318254 |
| SINU PEREARST OÜ kustutatud (former name OÜ Marek Vahar perearstikabinet) | 16045298 |
| SISU CONSULTING OÜ | 16190327 |
| MILTTON SISU OÜ kustutatud | 14714938 |
| SISU TRADE OÜ | 12936379 |
| SISU CONSULT OÜ | 12402844 |
| SINU ARST OÜ | 10486895 |
| SINU MAALER OÜ | 16057344 |
| SINU FÜSIO OÜ | 17040311 |
| SINU HIND OÜ | 12861960 |
| SINU JURIST OÜ | 16870594 |
| SINU SOCIALS OÜ | 17377654 |
| SINU ELU OÜ | 11719935 |
| SINU AUTOD OÜ | 16615057 |
| SINU TAKSO OÜ | 16880977 |
| SILU PROJEKTID OÜ (former name SL Business OÜ) | 10442348 |
| SINU RAAMATUPIDAMISBÜROO OÜ (former name New Arrivals OÜ) | 12581309 |
| SINU VANKRID OÜ | 12322565 |
| SISU SOCIAL OÜ | 16769760 |
| SINU CATERING OÜ | 11941361 |
| SINU KONTOR OÜ | 14660042 |
| SINU MAIUSTUS OÜ | 16472014 |