| Company name | Reg. code |
|---|---|
| POLAR HOLDING OÜ | 10730060 |
| POLAR SUN HOLDING OÜ | 16724378 |
| POLARIS HOLDING OÜ | 17065802 |
| POLARISSIMA HOLDINGS OÜ | 16864955 |
| SUNLY HOLDING OÜ (former name Sunly Solar Holding OÜ) | 16425243 |
| SOLARFARM OÜ (former name CARLGUSTAV HOLDING OÜ) | 14077118 |