| Company name | Reg. code |
|---|---|
| HEA HOLDING OÜ | 14308753 |
| HEARTBEAT HOLDING OÜ | 14251102 |
| HEADINGTON HOLDING OÜ | 14366414 |
| HEVA HOLDINGS OÜ | 16108314 |
| UUSIM HEALTHCARE HOLDING OÜ | 16294759 |
| HÄRMA EHITUS EESTI OÜ (former name HEE Holding OÜ) | 10872051 |
| RAIDKUNST OÜ (former name EHA KAKS Holding OÜ) | 17175941 |