Four Chord Music Festival has released its 2026 lineup, with headline sets from hardcore band Knocked Loose and post-hardcore act Pierce the Veil. The festival is scheduled for Sept. 25–26 at F.N.B. Stadium in Pittsburgh and is marking its 12th year. Across the two-day bill, additional performers announced include Underoath and Mayday Parade, alongside acts such as Kublai Khan TX and We Came As Romans. Other listed bands include Boys Like Girls and Militarie Gun. The announcements indicate a mixed lineup spanning heavy and alternative rock genres, with multiple bands taking part in both days of the event. The festival’s lineup details are presented as part of the broader release of the 2026 programming, with the two headline acts serving as the top billing. Further schedule information beyond the lineup was not included in the provided reports.