University of Chicago accounting professor James "Mac" McKinsey founds the firm. First client: meatpacker Armour & Co.
Marvin Bower, a lawyer and Harvard MBA, joins the New York office and essentially invents the discipline of modern management consulting.
Marshall Field & Co. becomes the firm's first big client and eventually hires James McKinsey to be CEO.
Opens first non-U.S. office in London and wins landmark assignment with Bank of England.
Successful expansion overseas throughout Europe and Australia.
Launches The McKinsey Quarterly, which remains the foremost journal of management ideas produced by a consulting firm.
New strategy consulting boutiques Boston Consulting Group and Bain offer first intense competition in high-level strategy consulting.
McKinsey partner Louis Gerstner departs firm for American Express and later becomes CEO of RJR Nabisco and IBM. Other alums head some of the world's biggest companies.
McKinsey consultants Tom Peters and Bob Waterman publish In Search of Excellence.
Director Kenichi Ohmae's Triad Power helps to establish the firm's early lead on globalization.
McKinsey partner Jeffrey Skilling joins one of the firm's major clients, Enron.
Rajat Gupta becomes the first foreign-born managing partner.
Gupta accelerates global expansion, opening offices in Shanghai, Bogotá, Moscow, Beijing, Perth, Bangkok, Kuala Lumpur, and Singapore.
Three of the most recent books by McKinsey consultants sang the praises of Enron just before its collapse.
The high-tech boom helps to drive annual revenues over $3 billion for first time, making McKinsey twice as big as its nearest competitor in general management consulting.
McKinsey assists Hewlett-Packard CEO Carly Fiorina on HP's controversial Compaq acquisition. McKinsey earns $9 million on deal.