There are at least 5 groups named Catalyst.
1) Catalyst was a funk/jazz quartet from Philadelphia, Pennsylvania, whose material presaged the work of later jazz fusion artists. The group encountered regional success in the 1970s and have become more widely known since the re-release of their material on CD.
2) Catalyst are an indie rock band from San Francisco, CA. Core members include Shawn Lloyd (guitars, drums), Jesse Gale (guitars, vocals, bass) and Garrick O'Connor (keyboards, guitars, vocals). Contributing members include Ashley Hildreth (vocals) and Don Clark (drums). www.myspace.com/catalystsounds
3) Catalyst are a Bulgarian punk-rock band. The band consists of Nikul (guitars, vocals), Bobi (guitars, vocals), Lubo (bass, vocals), Shemet (drums, farts).
4) Catalyst were/was a group/artist on the early 90s rave scene which had released with Rabbit City records in the United Kingdom.
5) Catalyst were a melodic hard rock band fro the USA who released only one album, Paradise, in 1990.
6) Catalyst are a four-piece indie band from the midwest.