Members of Slipknot had played together in various metal bands since 1991. In January 1995, Colsefni, Crahan and Gray decided to form a new band.[1] They were soon joined by guitarists Donnie Steele and Josh Brainard and later drummer Joey Jordison.[2] In late 1995, the group changed their name to Slipknot.[3] In February 1996, after recording their debut album Mate. Feed. Kill. Repeat., Steele left the band over disagreement over lyrical content.[1]Craig Jones joined as Steele's replacement, although he soon moved to samples, media and keyboards.[4] Mick Thomson joined as Jones' replacement on guitar.[5]
In early 1997 Corey Taylor joined as lead vocalist, and Colsefni moved to backing vocals,[6] although he would depart by September 1997.[7] Greg Welts joined as Colsefni's replacement.[8] In Early 1998, DJ Sid Wilson also joined the band, bring the number of members to nine.[9] Welts was fired in July 1998, shortly before the band signed a record deal.[10]Brandon Darner was Welts' touring replacement although he departed soon after and was replaced by Chris Fehn.[11][12] Brainard left during Christmas 1998,[13][14] his replacement was Jim Root who joined the following year.[14] This line-up would stay together for over 10 years.
In May 2010, Paul Gray died.[15] In March 2011, former guitarist Donnie Steele rejoined as his touring replacement.[16][17] In December 2013, Jordison was fired from the band.[18][19][20] In October 2014, the band began touring with a new drummer and bassist, replacing Jordison and Steele respectively.[21] These musicians were later revealed to be Jay Weinberg and Alessandro Venturella respectively.[22][23]
In March 2019, Chris Fehn filed a lawsuit against the band due to withheld payments.[24] He was fired from the band later that month.[25] He was replaced by a musician that was later revealed to be Michael Pfaff.[26][27][28] Craig Jones parted ways with the band in June 2023,[29] he was replaced the same day by a musician whose identity has not been revealed, although they are rumoured to be either Zac Baird (ex-Korn), Nathan Church (ex-Downthesun) or Jeff Karnowski (ex-Dirty Little Rabbits).[30][31] The band also parted ways with Weinberg that November.[32]Eloy Casagrande joined as drummer the following year, leaving Sepultura to do so.[33][34][35]