Max Holloway, Paddy Pimblett and Gable Steveson have each been fined $2,500 for their post-fight celebrations at UFC 329.
The Nevada Athletic Commission handed down the penalties after all three fighters jumped out of the Octagon following their respective victories at the July 11 event in Las Vegas.
Their fight purses had initially been withheld pending a disciplinary hearing. The $2,500 fines have now been deducted, with the remainder of their purses released and no additional sanctions imposed.
The commission defended its stance on safety grounds, pointing to the chaotic aftermath of UFC 229 in 2018 as a reason for enforcing its rule prohibiting fighters from leaving the cage.
The rule has drawn criticism from several prominent UFC figures, including Daniel Cormier and Michael Bisping.
However, commissioners indicated that similar violations in the future could result in stricter penalties as they look to discourage fighters from leaving the Octagon after bouts.