UFC Fight Night 266: Bautista vs. Oliveira was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on February 7, 2026, at the UFC Apex in Enterprise, Nevada, part of the Las Vegas Valley, United States. A bantamweight bout between Mario Bautista and Vinicius Oliveira headlined the event.

Cast: Mario Bautista, Vinicius Oliveira, Kyoji Horiguchi, Amir Albazi, Rizvan Kuniev, Jailton Almeida