Finnish rock band formed in 1985 in Tornio, later relocated to Helsinki/Porvoo. The current line-up consists of founding member A.W. Yrjänä (vocals, bass), Janne Halmkrona (guitar), Timo Rasio (guitar) and Olli-Matti Wahlström (drums).

CMX (short for 'Cloaca Maxima') started as a hardcore punk band singing in English, but early on switched to Finnish and eventually moved to a bit more conventional style of rock, even though their music could be described as somewhat progressive and experimental (at least when compared to the other Finnish mainstream rock groups). Known for Yrjänä's folklore-esque lyrics, riped with references to religion, mythology, cultural anthropology, philosophy and arts; themes of CMX's songs are ranging from neoliberalism (concept they vigorously oppose), love, leap of faith, life and death to, as of late, futuristic imagery.