1. Coudal Partners
  2. Ogilvy & Mather
  3. AdSense Marketing and Advertising
  4. J. Walter Thompson
  5. Leo Burnett
  6. Young & Rubicam Inc.
  7. DDB Worldwide Communications Group inc
  8. Grey Advertising
  9. WPP Group plc
  10. BBDO Worldwide

    via:alexa