ONE Championship is a Singaporean mixed martial arts (MMA), grappling, kickboxing and Muay Thai promotion company. It was founded on 14 July 2011 by entrepreneur Chatri Sityodtong and former ESPN Star Sports senior executive Victor Cui. The promotion's first event was held on 3 September 2011 at the Singapore Indoor Stadium; they have since gone on to hold over 100 events across the Asian region. Wikipedia