The Ultimate Fighting Championship (UFC) is the largest and premiere mixed martial arts  promotion company in the world featuring 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 while brothers Frank and Lorenzo Fertitta control the UFC's parent company, Zuffa, LLC.