| Company name | Reg. code |
|---|---|
| ARTHÄLEN OÜ | 17033908 |
| ARTEVLEN OÜ | 14913425 |
| ARTHALL OÜ | 16033332 |
| ARTALON OÜ kustutatud | 10846459 |
| ARTOLEN OÜ kustutatud | 12202536 |
| ARTHAE CORP OÜ | 17036054 |
| BLACK KNIGHT EXPRESS OÜ (former name Arttlen OÜ) | 16555527 |
| THALEN INDUSTRIES OÜ | 17391520 |
| METALLART OÜ (former name Eco Motor OÜ) | 12226838 |