The Boston Consulting Group (BCG) is an American worldwide management consulting firm with 88 offices in 48 countries. The firm advises clients in the private, public, and not-for-profit sectors around the world, including more than two-thirds of the Fortune 500 and is one of the 'Big Three' strategy consulting firms (MBB). Considered one of the most prestigious management consulting firms in a branche-internal survey, BCG was ranked third in Fortunes "100 Best Companies to Work For" in 2016. The company was founded by Bruce D. Henderson, a Vanderbilt University and Harvard Business School alumnus. After many years in the purchasing department of Westinghouse in Pittsburgh (where pricing behavior gave him the idea of the experience curve), he joined Arthur D. Little in Cambridge, Massachusetts. He was then recruited by The Boston Company, where he founded a one-man, one-telephone consulting unit he named Boston Consulting Group. In 1975, Henderson arranged an employee stock ownership plan, and employees spun-off BCG from The Boston Company. The buyout of all shares was completed in 1979.