1. Accenture plc

2. Deloitte Touche Tohmatsu Limited

3. IBM Corporation

4. PricewaterhouseCoopers (PwC)

5. Ernst & Young Global Limited (EY)

6. KPMG International Limited

7. McKinsey & Company

8. Boston Consulting Group (BCG)

9. Bain & Company Inc.

10. Capgemini Services SAS