Bain Capital is a Boston-headquartered alternative Asset Management and financial services company that specializes in private equity, venture capital, credit and public market investments. Bain invests across a broad range of industry sectors and geographic regions. As of the beginning of 2012, the firm manages approximately $66 billion of investor capital across its various investment platforms.

The firm was founded in 1984 by partners from the consulting firm Bain & Company. Since inception it has invested in or acquired hundreds of companies including such notable companies as AMC Entertainment, Aspen Education Group, Brookstone, Burger King, Burlington Coat Factory, Clear Channel Communications, Domino's Pizza, DoubleClick, Dunkin' Donuts, D&M Holdings, Guitar Center, Hospital Corporation of America (HCA), Sealy, The Sports Authority, Staples, Toys "R" Us, Warner Music Group and The Weather Channel.
As of the end of 2011, Bain Capital had approximately 400 professionals, most with previous experience in consulting, operations or finance. Bain is headquartered at the John Hancock Tower in Boston, Massachusetts with additional offices in New York City, Chicago, Palo Alto, London, Luxembourg, Munich, Mumbai, Hong Kong, Shanghai and Tokyo.

Some of Bain's largest investors in private equity are public employee unions and their pensions funds. These investors include the California State Teachers Retirement System (CalSTRS), as was well as the University of California Retirement Plan (UCRP); with each having over 100 million USD committed as of the start of 2012.