Apollo Global Management, Inc. is an American private equity firm, founded in 1990 by former Drexel Burnham Lambert banker Leon Black. The firm specializes in leveraged buyout transactions and purchases of distressed securities involving corporate restructuring, special situations, and industry consolidations. Apollo is headquartered in New York City, and also has offices in Purchase, New York, Houston, London, Frankfurt, Luxembourg, Madrid, Hong Kong, Singapore, Mumbai, Delhi, and Shanghai.