LOS ANGELES — In less than 16 years, the UFC has grown from a money-losing company in a widely reviled sport into a global entertainment property worth $4 billion. While the UFC and its new owners figure out the company's next steps, Lorenzo and Frank Fertitta are tapping out of mixed martial arts with a remarkable return on a $2 million investment. The UFC has been sold for approximately $4 billion to a group led by Hollywood entertainment conglomerate WME-IMG, both companies confirmed Monday.