#2. The Boston Consulting Group, Inc.
The Boston Consulting Group’s reach-and expertise-is anything. With over 12,000 employees in 85 offices in 48 countries, the firm ranks as one of America’s Largest Private Companies. Clients typically include many of the world’s 500 largest companies, but BCG also counts midsized businesses, nonprofit organizations and government agencies in North and South America, Asia, Europe, the Middle East and Australia among its clients.