Official Weigh-In Results | UFC Fight Night: Allen vs Costa

UFC Fight Night: Allen vs Costa takes place on May 16, 2026, at Meta APEX in Las Vegas, streaming live on Paramount+. The main event is a five-round featherweight bout between No. 8 ranked Arnold Allen and No. 12 ranked Melquizael Costa. The official weigh-in results were released on May 15, 2026, confirming all athletes made weight ahead of the event.