The Ultimate Fighting Championship (UFC) is an American mixed martial arts promotion company, a subsidiary of the parent company William Morris Endeavor, based in Las Vegas, Nevada. It is the largest MMA promoter in the world and features most of the top-ranked fighters in the sport. Based in the United States, the UFC produces events worldwide that showcase ten weight divisions and abide by the Unified Rules of Mixed Martial Arts. The UFC has held over 300 events to date. Dana White serves as the president of the UFC.