The organization was purchased from its parent company SEG in 2001 by Zuffa LLC, a promotional company owned by Las Vegas casino magnates, Lorenzo and Frank Fertitta and managed by Dana White (current president of operations).

Tournament participation and overall Canadian UFC/MMA records[note 3] World Extreme Cagefighting (WEC) was purchased by Zuffa in 2006[3] and officially merged under the UFC brand on January 1, 2011.

[note 4] Strikeforce was purchased by Zuffa in 2011[5] and officially merged under the UFC brand on January 12, 2013.

[note 5] Each fight record has four categories: wins, losses, draws, and no-contests (NC).

4 fighters from Canada participated in the UFC's original tournaments(usually Openweight contests consisting of 3 fights in one night) and 25 Canadians have fought on The Ultimate Fighter(20 of the 25 received contracts to fight in the UFC).