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 |
| A. Porr - Allgemeine Baugesellschaft AG | Engelsberggasse 4 | 1030 | Wien | 25.06.1969 | revocable |
| A. Gerngross Kaufhaus-GesmbH | Mariahilfer Straße 38–48 | 1070 | Wien | 05.09.1978 | revocable |
| A. Artweger GesmbH | Sulzbacherstraße 60 | 4820 | Bad Ischl | 25.04.1994 | revocable |
| A. & S. Klein KG | Obere Augartenstraße 40 | 1020 | Wien | 22.07.1971 | revocable |
| Company Name | Address | Postcode | Place | Awarded on | Type of award |
