| Company name | Reg. code |
|---|---|
| TEC OÜ | 16875479 |
| ORVOS TEC OÜ | 10168373 |
| SVELTE TEC OÜ (former name Svelte Marine OÜ) | 12613854 |
| TEC WELAND OÜ | 16194621 |
| SPARTA TEC OÜ | 16583469 |
| LULUMARS TEC OÜ | 16480031 |
| SAPPHIRE TEC OÜ kustutatud | 14000765 |
| TEC NORDENGINEERS OÜ | 17376100 |
| DIN-TEC OÜ | 16504518 |
| VAULT-TEC OÜ | 17453384 |
| KEL-TEC OÜ | 14745005 |
| LUFT-TEC OÜ (former name New Approach OÜ) | 11913554 |
| KE-TEC OÜ kustutatud | 10213932 |
| AIR TEC BALTIC OÜ | 16274219 |
| AIR TEC UKRAINE OÜ | 16465557 |
| TRUCK DIESEL TEC OÜ kustutatud | 12274180 |
| TRUCK DIESEL TEC OÜ kustutatud (former name Saku Aiameistrid OÜ) | 12878392 |
| TEC ELECTRONICS EU OÜ kustutatud | 12760749 |
| PRO-TEC ESTONIA OÜ kustutatud | 12038545 |
| ALL-TEC SERVICES OÜ kustutatud | 11710420 |
| ALL-TEC GROUP OÜ | 14119294 |
| AIR-TEC-SYSTEMS OÜ kustutatud | 11967478 |
| NORTH-TEC BALTICS OÜ kustutatud | 12345649 |
| E-TEC ELEKTER OÜ | 14776782 |
| LUFT-TEC SERVICE OÜ (former name ELT GROUP OÜ) | 14033055 |
| MEREKONTEINER OÜ (former name OÜ TEC) | 14153859 |
| RIMTEC OÜ (former name Rim Tec OÜ) | 16709953 |
| GARJANIA JOARIANALA OÜ kustutatud (former name Mast Tec OÜ) | 16177396 |
| R&T CAPITAL OÜ (former name Net Tec Eesti OÜ) | 12571713 |
| AKTIVAPRO RAAMATUPIDAMINE OÜ (former name Hail-TEC Holding OÜ) | 16661324 |
| SERKRUQ OÜ (former name TRUCK DIESEL TEC OÜ) | 11349680 |
| Q2 POINT AS (former name Sisco Tec Eesti OÜ) | 12657811 |
| TEX TECH OÜ | 14430000 |
| TECA OÜ | 14445094 |
| TECH12 OÜ kustutatud | 14880594 |
| 233 TECH OÜ kustutatud | 14926215 |
| TECH RD OÜ | 17140596 |
| JM TECH OÜ | 16252287 |
| AI TECH OÜ | 16097220 |
| AG TECH OÜ kustutatud (former name Perekonnasuhete keskus OÜ) | 11881699 |
| IB TECH OÜ | 14228681 |
| TC TECH OÜ | 12606653 |
| WF TECH OÜ kustutatud | 14359804 |
| HV TECH OÜ | 12804749 |
| HD TECH OÜ kustutatud | 16613511 |
| IA TECH OÜ | 16460620 |
| TECH ON OÜ | 11680848 |
| GW TECH OÜ | 17062560 |
| BA TECH OÜ | 14044679 |
| LT TECH OÜ | 11725443 |