McKinsey & Company is a global management consulting firm founded in 1926 by University of Chicago professor James O. McKinsey, that offers professional services to corporations, governments, and other organizations.
Boston Consulting Group, Inc. is an American global management consulting firm founded in 1963 and headquartered in Boston, Massachusetts.
GLG is a financial and global information services company headquartered in New York City. The company provides financial information and advises investors and consultants with business clients seeking expert advice.