| Company name | Reg. code |
|---|---|
| STT HOLDINGS OÜ kustutatud | 12468665 |
| HTT HOLDINGS OÜ | 17213438 |
| SST HOLDING OÜ (former name LP JUUKSUR OÜ) | 14795724 |
| SLT HOLDING OÜ | 16936028 |
| SMT HOLDING OÜ (former name DAR Holding OÜ) | 14261307 |
| ELERIN EHITUS OÜ (former name TT Capital Holding OÜ) | 14050125 |