This directory aims at historical review only and does not claim to provide actual information.
| Company Name | Address | Postcode | Place | Awarded on | Type of award |
| ZECH Holzfenster GmbH & Co KG | Zielstraße 21 | 6840 | Götzis | 06.02.1996 | revocable |
| ZIMM Maschinenelemente GmbH + Co KG | Millenniumpark 3 | 6890 | Lustenau | 30.10.2014 | revocable |
| Zumtobel KG | Höchsterstraße 8 | 6850 | Dornbirn | 15.10.1976 | revocable |
| Zumtobel Staff GmbH | Schweizerstraße 30 | 6850 | Dornbirn | vor 2006 | revocable |
| Zürserhof Hotel GmbH | Zürserhof | 6763 | Zürs | 04.02.1970 | revocable |
| Company Name | Address | Postcode | Place | Awarded on | Type of award |
