| Company name | Reg. code |
|---|---|
| GRENTANY OÜ kustutatud | 12311751 |
| GRENTANA INTERNATIONAL OÜ | 16168285 |
| GREENTAN OÜ | 14243091 |
| GRENMAN OÜ | 11936746 |
| GRESTAN OÜ | 12334605 |
| GREENTAN TYÖVOIMA OÜ | 14703952 |
| GREENTAN AGRI OÜ | 16836976 |
| GREENTAN ESTONIA OÜ (former name CST International OÜ) | 14436959 |
| GRENPAY TECHNOLOGY OÜ | 16497497 |
| SET-INSTALL OÜ (former name Greentan Install OÜ) | 14819867 |
| GSCA TÖÖTEENUSTE OÜ (former name OÜ Greentan Tööjõuteenused) | 14873424 |