| Company name | Reg. code |
|---|---|
| EXAWATT OÜ | 14237125 |
| SEAWATT OÜ | 17332396 |
| ECOWATT OÜ kustutatud | 14985092 |
| MEGAWATT HARDWARE OÜ | 17482894 |
| MEGAWATT NETWORK OÜ (former name Energia Kiir OÜ) | 16649010 |
| TERAWATT ENERGY OÜ | 14599093 |
| TERAWATT NETWORKS OÜ (former name OÜ KaNeti) | 11203723 |