- Automotive
- A.T.U – Autoteile Unger
- Europcar Deutschland/International
- Ford Motor Company
- LeasePlan
- TRW Automotive
- Volkswagen
- Engine and Plant Manufacturing
- Jungheinrich
- Siemens
- Still
- von Roll
- Financial Services
- Commerzbank
- Leaseplan Italia
- DAB Bank
- Deutsche Bank
- Credit Suisse
- Postbank
- DekaBank
- Process Industries
- Arcelor Mittal
- BASF
- BP Oil & Gas
- CBP Leuna/ Infra Leuna
- ChemaWeyaat
- Treofan
- IT/Telecommunications
- Ciao.com
- Deutsche Telekom
- MTS Ukraine
- O2 Germany
- Orange Schweiz
- SAP
- T-Mobile
- The Phone House
- Kabel Deutschland
- AOL
- Utilities
- Atel
- Berner Kraftwerke
- E.ON
- Gasag
- RWE
- United Utilities
- Vattenfall
- Postal Services/Logistics
- Deutsche Post
- DHL Europe
- Stinnes
- Swissport
- Financial Investors
- Apax Partners
- BC Partners
- KKR
- Goldman Sachs
- Orlando Management
- Penta Investments
- Other
- Arcandor/ Primondo
- Vivantes
- Bosch Siemens Hausgeräte
- Wittgensteiner Kliniken