Circa:

Circa (stylized as CIRCA:) is a progressive rock supergroup founded by four musicians associated with Yes: former Yes members Alan White (drums), and Tony Kaye (Hammond, keyboards), current Yes members Billy Sherwood (vocals, bass guitar) and Jay Schellen (drums), and guitarist Jimmy Haun, who played on the Yes album Union.

From 2012, the line-up consisted of Sherwood (vocals, guitar), Kaye (keyboards), Rick Tierney (bass guitar), and Scott Connor (drums).