[PAR] [TLE] Apollo Global Management [SEP] Apollo Global Management, LLC 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, Los Angeles, Houston, London, Frankfurt, Luxembourg, Singapore, Hong Kong and Mumbai. [PAR] [TLE] OM Group [SEP] OM Group Incorporated is a metal-based chemistry firm based in Cleveland, Ohio, United States.  It is a provider of speciality chemicals, advanced materials and technologies.  The company was listed on the New York Stock Exchange prior to being privatized by Apollo Global Management in June 2015.
[PAR] [TLE] Apollo Global Management [ SEP ] Apollo Global Management , LLC 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 , Los Angeles , Houston , London , Frankfurt , Luxembourg , Singapore , Hong Kong and Mumbai . [PAR] [TLE] OM Group [ SEP ] OM Group Incorporated is a metal - based chemistry firm based in Cleveland , Ohio , United States . It is a provider of speciality chemicals , advanced materials and technologies . The company was listed on the New York Stock Exchange prior to being privatized by Apollo Global Management in June 2015 .
When was the firm who privatized OM Group after it was listed on the New York Stock Exchange founded?
When was the firm who privatized OM Group after it was listed on the New York Stock Exchange founded ?
1990
1990