| Company name | Reg. code |
|---|---|
| QUADZERO OÜ | 14964960 |
| QUADMERC OÜ | 16508189 |
| QUADRO CENTER OÜ kustutatud | 12833159 |
| QUADRO DESIGN OÜ | 12684899 |
| QUADRO IT OÜ | 14562500 |
| ATROMG8 OÜ kustutatud (former name Quadro Design Rulo OÜ) | 12826900 |
| ARMSAV OÜ kustutatud (former name Quadro Design Aknad OÜ) | 12905580 |