Male or female subjects who are 18-75 years of age
Must have a history consistent with PsA ≥6 months at Screening
Must have a documented history or active signs of at least one of the following at Screening: Plaque psoriasis or nail changes attributed to psoriasis
Have had inadequate response or intolerance to ≥1 csDMARD, apremilast and / or NSAID, administered over the course of ≥12 weeks for the treatment of PsA
Cannot have Prior exposure to a JAK inhibitor >2 doses