| Agusta Westland UK | Imerys |
| Airbus | INBEV |
| Alcan Packaging | Institut du Management de l'Achat Indust |
| Allergan Ltd | Johnson Diversey |
| Altadis S.A. | Kellogg's Europe Trading Ltd |
| American Express | KLM Royal Dutch Airlines |
| Amgen International | La Lettre Des Achats |
| Aramco Overseas Company | Lana Karlovacka Tiskara D.D. |
| Arendi Consulting | Lego System A/S |
| Astra Zeneca | Linklaters |
| AT Kearney | Masterfoods |
| Author of 'CollaborativeSourcing' | MBDA |
| AVAYA | McBride Plc |
| Avon Cosmetics Ltd | MDA |
| AXA Group | Merck Sharp & Dohme |
| BAE Systems | Merrill Lynch |
| Barclays plc | Metronet Rail |
| BASF Antwerpen NV | Metropolitan Police Service |
| Bekaert | MM Packaging |
| Beko TicaretAS | Mytravel UK Ltd |
| Belgacom | Nationwide Building Society |
| Belgacom Mobile N.V. | NAVTEQ |
| Beroe Inc. | Nestec Ltd |
| Birmingham Business School | Nestle Ltd |
| BMI | Network Rail |
| BOC Group | Nokia |
| Borealis | Northumbrian Water Limited |
| BP | Novartis International AG |
| Bristol Myers Squibb | Numico |
| British Airways | Orangina Group |
| British Energy | Pfizer |
| British Sugar Plc | Pirelli Tyres |
| Britvic Soft Drinks Plc BT | PLIVA Croatia Ltd. |
| Bulgarian Telecommunication Company | Pliva Lana- Karlovacka Tiskara |
| Chevron | Polimoon |
| Cloetta Fazer Production Ltd | Polska Telefonia Cyfrowa Sp. zoo |
| Cloetta Fazer Sverige AB | PPG Industries Inc. |
| Computacenter(UK)Ltd | PricewaterhouseCoopers |
| Continenta lAG | Proactis |
| Corbus | PSA Peugeot Citroen |
| CPO Agenda | Reemtsma Cigarettenfabriken GmbH Rohm & Haas UK Ltd |
| Croon Elktrotechniek B.V. | Rolls-Royce Plc. |
| Danish Purchasingand Logistics Forum | Royal Mail |
| Danone | RWE |
| Darchem Engineering Ltd | SEB |
| De Nederlandsche Bank NV | Severn Trent |
| Delphi | Shell |
| Deutsche Post World Net | Sidel |
| Digital Oilfield | Siemens Enterprise |
| DML | STMicroelectronics |
| Dow Corning | Stolt Nielsen Transportation Group BV |
| EADS | SWIFT SCRL |
| EDP Energy | Telefonica |
| EDS | Tennant Europe N.V. |
| EFACEC | Tesco International Sourcing |
| EIPM | Thales |
| Elsevier | Thomas Cook UK Ltd |
| Essent | Total France |
| Firmenich S.A. | Toyoto Motor Europe |
| Fleet Logistics International | TUI-AG |
| France Telecom | UCB |
| General Electric | Uniqema |
| Georg Fischer Automotive | Virgin Atlantic Airways |
| GN Store Nord A/S | Visteon Corporation |
| Groupe Danone | Volkswagen |
| Heidelberg Cement | Weasler Engineering |
| HEINEKEN Nederland Business Services | Weir Clear Liquid Division |
| Henkel KGaA | Wincor Nixdorf International GmbH |
| Hitachi Europe GmbH | Yorkshire Purchasing Organisation |
| HJ Heinz | ZF Polpharma |
| Holcim Group SupportLtd | Zurich Financial Services |
| HP |
|