| Company name | Reg. code |
|---|---|
| GRATHEON OÜ | 12245103 |
| GRAPHION OÜ | 17229528 |
| GRAPHEN OÜ (former name Nigrum OÜ) | 14554185 |
| GRATTON OÜ | 10754042 |
| GRANTHON BUILD OÜ kustutatud (former name Granthon Build UÜ) | 14663052 |
| GRANTHON HAUS OÜ (former name Granthon Haus UÜ) | 14663046 |
| GRATION SERVICES OÜ kustutatud | 12609249 |
| GRETHEN CONSULT OÜ kustutatud | 11964847 |
| GATEEXPRESS OÜ kustutatud (former name Granthon Best OÜ) | 14666369 |
| ARENSGLOBAL OÜ (former name Granthon Credits OÜ) | 14666332 |