- Accenture (formerly Andersen Consulting) - Consulting
- Allianz Immobilien GmbH - Frankfurt – Insurance
- AOK - Die Gesundheitskasse in Hesse - Insurance
- Bank of America - Frankfurt - Bank
- Bank Verlag Köln - Publisher
- Bayer AG - Leverkusen - Chemicals
- Biotest - Dreieich - Pharma
- BNP Paribas - Frankfurt - Bank
- BTignite (formerly VIAG Interkom) - Munich - Telecommunications
- Cable & Wireless - Frankfurt - IT
- Caisse des Depots et Consignations - Frankfurt - Bank
- COMMERZ GRUNDBESITZ - Frankfurt - Bank
- Citibank - Düsseldorf / Meerbusch / Duisburg - Bank
- Daimler AG (T-Systems) – Frankfurt – Mannheim - Automotive
- Databurg – Frankfurt - Hosting
- Debitel - Stuttgart - Telecommunications
- Deutsche Börse – Frankfurt - Stock Exchange
- Ernst & Young AG - Dortmund / Frankfurt / Hamburg / Hannover / Stuttgart
- Equinix (formerly IX-Europe) – Frankfurt - Hosting
- HOCHTIEF Construction AG - Frankfurt / Düsseldorf - Construction
- IBM Mittelstand Systeme GmbH - Meerbusch - IT
- Infraserv Höchst - Frankfurt - Hosting
- inter Versicherung - Mannheim - Insurance
- Leopold Kostal GmbH & Co. KG - Lüdenscheid - Automotive
- Neckermann Versand AG - Frankfurt - Trade
- Plus Warenhandelsgesellschaft mbH - Mühlheim a.d. Ruhr / Bottropp / Ottendorf
- Rheinmetall Informationssysteme - Neuß/Marienburg - Automotive
- Schering AG – Berlin – Chemicals / Pharma
- Unilever – Hamburg – Food / Cosmetics
- Vodafone (formerly: Mannesmann Arcor) - Mainz - Telecommunications