The Ultimate Fighting Championship (UFC) is an American mixed martial arts promotion company based in Las Vegas, Nevada, that is owned and operated by parent company William Morris Endeavor. It is the largest MMA promotion company in the world and features the highest-level fighters on the roster. The UFC produces events worldwide that showcase twelve weight divisions and abide by the Unified Rules of Mixed Martial Arts. As of 2018, the UFC has held over 400 events. Dana White serves as the president of the UFC. White has held that position since 2001; while under his stewardship, the UFC has grown into a globally popular multi-billion-dollar enterprise.