| Company name | Reg. code |
|---|---|
| SIPTEC OÜ | 17183708 |
| SIPREM OÜ kustutatud | 12883105 |
| SIPSTER MOOD OÜ | 14340308 |
| BIPTEC OÜ | 16311216 |
| SINTEC TRADING OÜ kustutatud (former name Aura Trading OÜ) | 12213600 |
| SINTEC DAR OÜ | 17449885 |
| SINTEC EHITUS OÜ (former name SinTec System OÜ) | 16101660 |
| SILTEC GROUP OÜ | 16824996 |
| SIMATEC OÜ | 10426119 |
| FIXTEC OÜ | 10042904 |
| SINTEX OÜ kustutatud | 12201175 |
| SHIRTEC OÜ | 14364935 |
| RIMTEC OÜ (former name Rim Tec OÜ) | 16709953 |
| HIPTECH OÜ | 16671417 |
| SIHTECH OÜ | 16880931 |
| SEINTEC OÜ kustutatud | 16120189 |
| SINTECH OÜ | 14588706 |
| NIPTEX OÜ | 12961242 |
| SINTEN OÜ kustutatud | 10070929 |
| SELTEC OÜ | 12793394 |
| SILTEK OÜ | 14077791 |
| EPITEC OÜ | 16437207 |
| SINTEK OÜ | 16433356 |
| SEPTEM OÜ | 11950489 |
| SERTEC OÜ | 16452508 |
| SIMTECH OÜ | 11988233 |
| DIPTER OÜ | 11508782 |
| MICTEC OÜ | 14726338 |
| DIATEC OÜ kustutatud | 12093900 |
| SIITEH OÜ | 16667634 |
| SIMTEB OÜ | 16472110 |
| CIATEC OÜ | 14683534 |
| SAMTEC OÜ | 14014431 |
| SIMTEX OÜ | 12780546 |
| NIPITEC OÜ (former name Womens Dream OÜ) | 12934943 |
| SIPUTECH MUNGLAMBU OÜ (former name Foodyear OÜ) | 12695912 |
| GWS BIOTEC OÜ (former name Green World Solutions OÜ) | 14712394 |
| SIMATEC AUTOMAATIKA OÜ kustutatud | 10448150 |
| ECO SEPTIC OÜ | 16806923 |
| SEPTEM CAPITAL OÜ | 12569679 |
| NAPTEC INVEST OÜ kustutatud (former name Naptec Invest UÜ) | 12541681 |
| SERTEC SERVICE OÜ kustutatud | 12186180 |
| SIMTECH ENTERTAINMENT OÜ | 17056128 |
| FINTEC EKSPERDI OÜ | 10190243 |
| MIRTEC TEAM OÜ kustutatud (former name Revergate OÜ) | 12865780 |
| SAUTEC BALTIC OÜ | 17401795 |
| SINTEZ GRUPP OÜ | 11877226 |
| SEMTEC EESTI OÜ | 10621074 |
| SIMTECH GROUP OÜ | 14451290 |
| MIOTEC EESTI OÜ | 10225332 |