The main purpose of this study is to assess preliminary efficacy and safety of CFZ533/iscalimab (Cohort A), LYS006 (Cohort B), MAS825 (Cohort C), LOU064/remibrutinib (Cohort D) and VAY736/ianalumab (Cohort E) in patients with moderate to severe hidradenitis suppurativa and to determine if CFZ533, LYS006, MAS825, LOU064 and VAY736 have an adequate clinical profile for further clinical development.