A Study to Evaluate the Long-term Safety, Tolerability and Efficacy of Bimekizumab in Patients With Chronic Plaque Psoriasis

Inclusion Criteria:

Subject has provided informed consent
Subject completes all dosing requirements in feeder study and completes PS0010 study without meeting any withdrawal criteria
Female subjects of childbearing potential and male subjects with a partner of childbearing potential must continue to use an acceptable method of contraception (as detailed in PS0010) for up to 20 weeks after the last dose of study treatment in PS0011

Exclusion Criteria:

Subject has previously participated in this study.
Female subjects who plan to become pregnant during the study or within 20 weeks following last dose of study medication. Male subjects who are planning a partner pregnancy during the study or within 20 weeks following the last dose
Subject has any medical or psychiatric condition that, in the opinion of the Investigator, could jeopardize or would compromise the subject's ability to participate in this study.
Subject must have a negative interferon gamma release assay (IGRA) as measured at Week 8 of PS0010