| Entreprise | Fondé | Contacts |
|---|---|---|
| Wirz | 1936 | 6 |
| Bayer (Schweiz) AG | 1954 | 21 |
| Personalvorsorge Für Die Mitarbeiter Der Wirz Gruppe | 1961 | 1 |
| Personalvorsorge fⁿr die Mitarbeiter der Wirz Gruppe | 1961 | 1 |
| Wirz Management Ag | 1973 | 1 |
| Wirz Investor Relations AG Oeffentlichkeitsarbeit, Kommunikation | 1979 | 2 |
| Wirz Public Relations AG | 1991 | 2 |
| Wirz Identity AG | 1992 | 4 |
| Hpo Management Consulting Ag | 1995 | 1 |
| Master Internet | - | 1 |
| Wirtz, Joachim | - | 1 |
| Zorg Biogas AG | 2004 | - |
| Frontpage AG | - | 3 |
| Prime Forestry Switzerland Ag | - | - |
| Wirz Corporate AG | - | - |
| HPR Hermann Public Relations | - | 1 |
| Morel Dominique | - | 1 |
| newchips.com AG | - | - |
| Prime Forestry Group Ag In Liquidation | - | - |
| Credit Suisse Uetlibergstrasse | - | - |
| Feroplan Engineering AG | - | - |
| La Penisola | - | - |
| Rapp Wärmetechnik AG | - | - |
| Stiftung Allmend | - | - |
| Büro Karin @ Wirz Werbung | - | - |
| Neosoft AG | - | - |
| Wirz Services AG | - | - |
| Üetlibergstrasse 132 | - | - |
| Berlis AG | - | - |
| Biostrom International AG | - | - |
| Infrassure Holding AG | - | - |
| LCC Consulting AG | - | - |
| PE Investors Limited | - | - |
| Sutev AG | - | - |
| Swiss Insurance Investors AG | - | - |
| Tradejet AG | - | - |
| Datalogue Schweiz AG | - | - |
| Evolute AG | 2016 | 22 |
| IHI Ionbond AG | - | - |
| Wirz Xlab | - | - |
| Auriga Advisors | - | - |
| Bilgeri EnvironTec GmbH | - | - |
| Hpo Management Consulting Ag | - | - |
| Uetlibergstrasse 132 | - | - |
| Wirz Activation AG | - | - |
| YOUNITY / Wirz | - | - |
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