November 20, 2012

Santa Monica, CA – Bison Capital Partners IV, LP (“Bison Capital”) has announced its investment in United Therapies Holdings, LLC (“United Therapies” or the “Company”). The Company, through its affiliates, is a leading provider of urological services, technology and equipment, including lithotripsy – a proven, non-invasive procedure for the treatment of kidney stones. The investment proceeds were used to acquire the interests in United Therapies and its affiliates from the two founding physician partners, Drs. Donald Norris and Marc Rubenstein, who were the largest shareholders.

 United Therapies was founded in 1986 as the first non-academic lithotripsy center in Chicago and has been a leader in the industry ever since. The Company acquires, owns and operates lithotripter units, including fixed site and mobile lithotripter units, and provides lithotripsy related urological services. The Company currently operates through four fixed site locations and 32 mobile lithotripters covering approximately 210 sites in the states of Colorado, Illinois, Iowa, Indiana, Maine, New Hampshire, New Mexico, New York, Pennsylvania, Texas, Virginia, Washington and Wisconsin. 

Bison Capital is a Los Angeles and New York based private equity firm that makes growth capital investments in middle‐market companies, public or private, for expansion, acquisitions, and balance sheet recapitalizations. The firm’s primary investment focus is partnering with entrepreneurs and management teams seeking capital to grow their businesses. www.bisoncapital.com