| Company name | Reg. code |
|---|---|
| ESFB1 OÜ | 17291332 |
| ESFI OÜ (former name Tharapita Natural OÜ) | 14307430 |
| ESFF OÜ | 16710643 |
| ESFI EHITUS OÜ kustutatud | 11024179 |
| SFB CONSULTING OÜ | 17431394 |
| SFB BALLET OÜ | 14126213 |
| ESB-PGS OÜ (former name Baltic Generator Service OÜ) | 16671972 |
| ESB ACCOUNTING OÜ (former name ESB Accounting UÜ) | 12806501 |
| ESB FINANCES OÜ | 10393182 |
| ESB MARINE OÜ | 17388534 |
| ESB-UPS OÜ | 17199885 |
| ESB ESTONIA OÜ | 17086170 |
| ESB-LVS OÜ (former name ESB Service Group OÜ) | 11675468 |
| ESB INVEST OÜ | 12421356 |
| ESB LOGISTICS OÜ | 11004917 |
| ESB INKASSO OÜ kustutatud | 12654497 |
| ESB-MVS OÜ (former name VIVEND OÜ) | 11455353 |