Which of these artists was NOT a member of the electronic music supergroup Swedish House Mafia, which split up in 2013?

Alesso was not a member of the electronic music supergroup Swedish House Mafia, which split up in 2013. Although Alesso is a highly successful and renowned Swedish DJ and producer, he was not part of the trio consisting of Axwell, Sebastian Ingrosso, and Steve Angello, who formed Swedish House Mafia. While Alesso has collaborated and performed with members of Swedish House Mafia individually, he was not officially part of the group during their active years or at the time of their split.