On August 9, 2023, U.S. District Judge Richard Boulware granted class action status to more than 1,200 former UFC fighters who competed between December 2010 and June 2017 and are suing for $800 million upward to $1.6 billion in wages, as the lawsuit claims Zuffa had abused its power to suppress UFC fighters' wages.

[2] On March 20, 2024, TKO, UFC parent company reached an agreement to settle all claims in the class action lawsuits for $335 million where the settlement amount will be deductible for tax purposes.

[3][4] However, on July 31, 2024, Judge Richard Boulware ruled that the case would be heard by a jury and denied the preliminary approval for a settlement and reset for trial of in October.

[5][6] On February 6, 2025, Judge Richard Boulware of Nevada granted final approval for a $375 million settlement in the "Le vs. Zuffa" antitrust lawsuit for monopolistic practices.

The following fighters fought their first UFC fight in 2025: The list below is based on fighters suspended either by (1) United States Anti-Doping Agency (USADA) or World Anti-Doping Agency (WADA) for violation of taking prohibited substances or non-analytical incidents, (2) by local commissions on misconduct during the fights or at event venues, or (3) by the UFC for reasons also stated below.