From the official press release:
BEVERLY HILLS, CA (July 11, 2016) - WME | IMG today announced the acquisition of UFC, the world's premier professional mixed martial arts (MMA) organization.
A global leader in entertainment and sports with a portfolio of more than 800 owned, operated and/or commercially represented events, WME | IMG will also serve as UFC's operating partner. WME | IMG, which has a proven track record of building leading sports brands, will focus on accelerating the sport's popularity and presence around the world. Silver Lake Partners and KKR will join WME | IMG as new strategic investors, along with MSD Capital, L.