Circa

Founded in California in 2007, Circa is a progressive rock supergroup founded by four musicians associated with Yes - former member Alan White (drums), former member Tony Kaye (keyboards), current member Billy Sherwood (bass, vocals), current member Jay Schellen (drums), and Jimmy Haun (guitar), who played on Union.

Since 2012, the lineup has consisted of Sherwood (vocals, guitar), Kaye (keyboards), Rick Tierney (bass), and Scott Connor (drums).