| Company name | Reg. code |
|---|---|
| ENERMA OÜ | 16409636 |
| ENERTA OÜ | 14998657 |
| ENERIA OÜ | 14785105 |
| ENERA OÜ | 10810378 |
| E-ENERGA OÜ | 12644582 |
| ENERGY EXPRESS ENERGIA OÜ | 14147468 |
| ENERIK OÜ kustutatud | 12221226 |
| ENEMAR OÜ (former name OÜ SolEner) | 14551956 |
| ENERIL OÜ | 16551050 |
| ENERMET OÜ | 11741550 |
| ENERGIA24 OÜ kustutatud | 11935136 |
| ENEMAT OÜ | 10391125 |
| ENERGI OÜ | 14997818 |
| ENERITA OÜ | 14116628 |
| ENERLAB OÜ | 11302595 |
| 5 ENERGIA OÜ | 12184888 |
| ENEREL OÜ | 11651657 |
| 220 ENERGIA OÜ kustutatud | 12271081 |
| ENERGO OÜ | 16434781 |
| ENEREGA OÜ | 16840759 |
| JUSO ENERGY OÜ | 12876329 |
| FOENIX ENERGIA OÜ | 10648647 |
| ENERGY CONSULT OÜ | 10883331 |
| PHH ENERGY OÜ kustutatud | 10907758 |
| ENERLY INNOVATIONS OÜ | 17133780 |
| NOVATOR ENERGY OÜ | 12603152 |
| SONCE ENERGY OÜ | 14856762 |
| KAAMOS ENERGY OÜ (former name Kaamos Trading OÜ) | 11695726 |
| ARS ENERGY OÜ kustutatud | 11509497 |
| ALTER ENERGY OÜ | 16960274 |
| GLI ENERGIA OÜ (former name GLIMSTEDT Energia OÜ) | 12248604 |
| MANILA ENERGIA OÜ | 16661382 |
| EMERALD ENERGY OÜ | 12171936 |
| ENERGIA VALGUS OÜ (former name Sõrve Õun) | 12778259 |
| UONIC ENERGY OÜ | 14762570 |
| PÕHJA ENERGIA OÜ | 14873588 |
| ENERGY BOOST OÜ | 16641913 |
| ARUKÜLA ENERGIA OÜ | 14955257 |
| VAYU ENERGIA OÜ | 11969052 |
| RN ENERGY OÜ | 14474523 |
| SCANDIC ENERGY OÜ kustutatud | 12052143 |
| GREEN ENERGY OÜ | 11126968 |
| PAROX ENERGY OÜ | 14737514 |
| JP ENERGO OÜ | 11551192 |
| CPO ENERGY OÜ | 16516496 |
| ENERGE EESTI OÜ | 11729260 |
| ENERGO MANAGEMENT OÜ | 10647599 |
| WESTERN ENERGY OÜ kustutatud | 11947820 |
| ALTARE ENERGY OÜ kustutatud | 12102792 |
| SOLID ENERGY OÜ kustutatud | 12651932 |