Bill Bain

William Worthington Bain Jr. (July 30, 1937 – January 16, 2018) was an American management consultant, known for his role as one of the founders of the management consultancy that bears his name, Bain & Company. Prior to founding Bain & Company, he was a vice-president at the Boston Consulting Group (BCG). He then got married and became a father.

In the early 1970s, Bain was considered internally at Boston Consulting Group to be Henderson's eventual successor. However, in 1973 Bain resigned from BCG to start his own strategy consulting firm. and for many years would only accept assignments that reported to the client's CEO. One account portrayed Bain as so obsessively secretive about the guidance it offered its clients that the firm earned the nickname "the KGB of consulting".

He formed Bain Capital, a private equity firm, in 1984,