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 |
| KUNEX Trenwerk GesmbH | Bahnhofstr. 2 | 4531 | Kematen an der Krems | 07.12.1990 | revocable |
| Kroiss & Bichler GesmbH | Gutenbergstraße 2 | 4840 | Vöcklabruck | 13.11.1985 | revocable |
| Krippner & Kletzmaier Elektronikbau GmbH | Gewerbepark Urfahr 14-16 | 4041 | Linz | 26.01.1982 | revocable |
| Kremsmüller Industrieanlagenbau GesmbH & Co KG | Kremsmüllerstraße 1 | 4641 | Steinhaus bei Wels | 13.12.1985 | revocable |
| Keplinger GmbH | Keplingerstraße 2 | 4050 | Traun | 16.03.2009 | revocable |
| Kellner & Kunz Aktiengesellschaft | Boschstraße 37 | 4600 | Wels | 30.10.2014 | revocable |
| KE KELIT Kunststoffwerk GesmbH | Ignaz Mayer-Str. 17 | 4020 | Linz | 15.10.1984 | revocable |
| Company Name | Address | Postcode | Place | Awarded on | Type of award |
