['rheumatoid arthritis']
['filgotinib', 'placebo to match filgotinib', 'mtx', 'placebo to match mtx']

        Key Inclusion Criteria:

          -  Have a diagnosis of RA (2010 American College of Rheumatology [ACR]/European League
             Against Rheumatism [EULAR] criteria) and are ACR functional class I-III.

          -  Have ≥ 6 swollen joints (from a swollen joint count based on 66 joints (SJC66)) and ≥
             6 tender joints (from a tender joint count based on 68 joints (TJC68)) at both
             screening and Day 1.

          -  Limited or no prior treatment with MTX

        Key Exclusion Criteria:

          -  Previous treatment with any janus kinase (JAK) inhibitor

          -  Previous therapy for longer than 3 months with conventional synthetic disease
             modifying antirheumatic drugs (csDMARDs) other than MTX or hydroxychloroquine

          -  Use of any licensed or investigational biologic disease-modifying antirheumatic drugs
             (DMARDs)

        NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.
      