TKO Group Holdings, Inc. is an American sports and entertainment company. Established on September 12, 2023, the public company was formed by a merger between Endeavor subsidiary Zuffa—the parent company of the Ultimate Fighting Championship, a mixed martial arts promotion—and the professional wrestling promotion World Wrestling Entertainment. TKO's CEO is Ari Emanuel and president Mark Shapiro, both of Endeavor; Dana White and Nick Khan retained their roles as CEOs of UFC and WWE, respectively after the merger. WWE co-founder Vince McMahon served as executive chairman until resigning from the company in January 2024 amid a sex trafficking scandal. The merger marked the first time that WWE has not been solely and primarily majority-controlled by the McMahon family, which founded the company and owned it for over 70 years. As of 2024, the UFC and WWE were the two most valuable combat sports organizations in the world according to Forbes. UFC was listed as the most valued mixed martial arts company with a revenue of $1.406 billion and WWE is the most valued professional wrestling promotion with a revenue of $1.398 billion in 2023.