| Company name | Reg. code |
|---|---|
| O3 ENERGY OÜ | 14291372 |
| W.O.G.E ENERGY OÜ | 16020223 |
| U ENERGY OÜ | 14128270 |
| ENERGYS OÜ | 17187787 |
| L ENERGY OÜ | 16038418 |
| A+ENERGY OÜ | 16211779 |
| RN ENERGY OÜ | 14474523 |
| ZZ ENERGY OÜ | 12301280 |
| US ENERGY OÜ kustutatud | 12019447 |
| CW ENERGY OÜ (former name Coal-Wood Energy OÜ) | 14241279 |
| KH ENERGY OÜ | 16746799 |
| KT ENERGY OÜ | 11936880 |
| HG ENERGY OÜ | 14743897 |
| RF ENERGY OÜ | 12885653 |
| TE ENERGY OÜ | 16862152 |
| RS ENERGY OÜ | 16093943 |
| EV ENERGY OÜ kustutatud | 12085473 |
| SD ENERGY OÜ | 16267461 |
| IB ENERGY OÜ | 10818820 |
| ENERGYON OÜ kustutatud | 11975495 |
| JS ENERGY OÜ | 14348480 |
| GE ENERGY OÜ | 12997903 |
| KC ENERGY OÜ (former name Combiwood Energy OÜ) | 16051063 |
| BF ENERGY OÜ | 16679946 |
| PB ENERGY OÜ | 12345589 |
| ENERGYFY OÜ | 14995908 |
| R8 ENERGY OÜ | 16673505 |
| PR ENERGY OÜ | 16438336 |
| ND ENERGY OÜ | 16294593 |
| VK ENERGY OÜ | 16615672 |
| US ENERGY OÜ | 16940573 |
| TM ENERGY OÜ | 10828349 |
| FS ENERGY OÜ | 16819334 |
| ORC ENERGY OÜ kustutatud | 11979346 |
| ONE ENERGY OÜ | 12481588 |
| ENERGYSYN OÜ kustutatud | 12658510 |
| PHH ENERGY OÜ kustutatud | 10907758 |
| ARS ENERGY OÜ kustutatud | 11509497 |
| CPO ENERGY OÜ | 16516496 |
| DOT ENERGY OÜ | 12794790 |
| BEL ENERGY OÜ kustutatud | 12213899 |
| SCW ENERGY OÜ kustutatud | 16354160 |
| PVA ENERGY OÜ (former name Red Cat Coin OÜ) | 14716630 |
| BMG ENERGY OÜ | 16388644 |
| APP ENERGY OÜ | 14618502 |
| S.K ENERGY OÜ | 16474326 |
| MRK ENERGY OÜ | 12609108 |
| ENERGYCAR OÜ | 14172762 |
| LPG ENERGY OÜ | 16796188 |
| VAV ENERGY OÜ kustutatud | 12717424 |