| Company name | Reg. code |
|---|---|
| THT OÜ | 12833277 |
| THT TRANS OÜ | 14869693 |
| THT FACTOR OÜ | 14028605 |
| THT EHITUS OÜ (former name Truusa Construction OÜ) | 14323876 |
| THT INFOTÖÖ OÜ | 12173728 |
| THT RAAMATUPIDAMINE OÜ | 16303056 |
| THT KONSULTATSIOONID OÜ | 12060836 |
| TET-A-TET OÜ | 12498424 |
| THE OÜ | 12262159 |
| TET OÜ | 16679652 |
| TÄHT OÜ | 12390839 |
| HTT OÜ kustutatud | 12017520 |
| THE8 OÜ | 16240717 |
| THZ OÜ | 11302193 |
| THV OÜ | 12036032 |
| 6THC OÜ | 14371734 |
| KHT OÜ | 14055393 |
| THB OÜ | 14943417 |
| BHT OÜ (former name JSP OÜ) | 14107871 |
| THE4 OÜ | 17353858 |
| NHT OÜ | 14954536 |
| TGT OÜ | 11727411 |
| AHT3050 OÜ | 12870373 |
| TJT OÜ | 12252273 |
| THM OÜ kustutatud | 14132082 |
| THU321 OÜ kustutatud (former name Tööhunt OÜ) | 14002965 |
| THF OÜ kustutatud | 16093481 |
| TAHT OÜ | 16463972 |
| THS OÜ | 12827360 |
| TET-A-TET-LESSONS OÜ kustutatud | 16424943 |
| THE WAY OF THE HEART OÜ | 16919343 |
| THE NARRATIST OÜ | 16840191 |
| THE CROSSWAYS OÜ | 16620041 |
| TJT INVEST OÜ | 11661058 |
| THE 1548 GROUP OÜ kustutatud | 14295140 |
| THE MARITIMEMEDIA OÜ kustutatud | 14749227 |
| THE SIGNED OÜ | 16612981 |
| THE DISRUPTORS OÜ | 14558059 |
| THE ARTEFACT OÜ | 17241541 |
| THE BODLA OÜ | 16715936 |
| THE SUN OÜ | 12572993 |
| HTT VEOD OÜ | 14458091 |
| THE WEATHER OÜ | 16396017 |
| THE CONECTO OÜ kustutatud | 16087701 |
| THE ZEIDANS OÜ kustutatud | 16479594 |
| THE BLOCKCHAINSMOKER OÜ | 16546770 |
| THE HOLDING OÜ | 16138249 |
| UKU TÄHT OÜ | 16965550 |
| TET-KO OÜ (former name TET- KO) | 10210922 |
| THE SONANT OÜ | 14991997 |