| Company name | Reg. code |
|---|---|
| DECOLUM OÜ (former name Klaven OÜ) | 16322527 |
| DECORUM OÜ kustutatud | 11053181 |
| DISCIMUS-DECORUM OÜ kustutatud | 11108893 |
| DECOLOR OÜ kustutatud | 16551340 |
| DECORLUX EHITUS OÜ | 17386104 |
| AK DECORUS OÜ | 14009921 |
| DECORUS RUUM OÜ (former name Decorus Sisustus OÜ) | 14185003 |
| HOME LIGHTING 24 OÜ (former name DECOLUX LK-STUDIO OÜ) | 14363746 |
| EVOLUM OÜ | 14807924 |
| DEALUM OÜ (former name Startup Includer OÜ) | 14238426 |
| ECOLUS KAUBANDUS OÜ | 16724674 |
| DEOLUX EESTI OÜ kustutatud | 16574743 |
| COLUM INVEST OÜ kustutatud | 12202200 |
| ECOLUX A. R. OÜ kustutatud | 10700617 |