| Company name | Reg. code |
|---|---|
| HRE4 HOLDING OÜ (former name Roheline Kadakas OÜ) | 14979269 |
| MASKAVAS HRE HOLDING OÜ | 17052544 |
| HCE HOLDING OÜ | 16693749 |
| GRE HOLDING OÜ | 16857814 |
| HRC HOLDING OÜ | 11558805 |
| HRL HOLDING OÜ | 17435558 |
| HRY HOLDINGS OÜ | 16420649 |
| HÄRMA EHITUS EESTI OÜ (former name HEE Holding OÜ) | 10872051 |
| FSTAGE OÜ (former name MO-RE Holding OÜ) | 16135593 |