ONE Championship, formerly ONE Fighting Championship until January 2015, is a multinational combat sports promotion founded on 14 July 2011 by Chatri Sityodtong and Victor Cui. Originally focused on mixed martial arts (MMA), ONE events have since incorporated muay thai, kickboxing, and submission grappling bouts. The promotion held its first event on 3 September 2011 at the Singapore Indoor Stadium, and has since held over 200 events across Asia. In 2022, parent company One Group Holdings, changed its legal operations from Singapore to the Cayman Islands.