Inclusion Criteria:

• Newly diagnosed or relapsed GPA and MPA (according to the 2022 ACR/EULAR classification criteria for GPA and MPA) requiring treatment with RTX and GC as per investigator's judgement.
• BVAS assessment with ≥1 major item, or ≥3 minor items, or ≥2 renal items at Screening.
• Positive antibody test for anti-proteinase 3 (PR3) or anti-myeloperoxidase (MPO) antibodies at Screening or with history of documented evidence of a positive antibody test.

Exclusion Criteria:

• Other systemic disease which constitutes the primary illness, including but not limited to: eosinophilic granulomatosis with polyangiitis (EGPA), moderate to severe systemic lupus erythematosus, IgA vasculitis (Purpura Schönlein-Henoch), rheumatoid vasculitis, Sjögren's syndrome, anti-glomerular basement membrane (GBM) disease, cryoglobulinemic vasculitis, autoimmune hemolytic anemia, autoimmune lymphoproliferative syndrome or mixed connective tissue disease.
• Alveolar hemorrhage requiring invasive pulmonary ventilation support at Screening.
• Severe kidney disease defined as estimated glomerular filtration rate (eGFR) <15 mL/minute/1.73m2, or kidney failure defined as receiving renal replacement therapy such as hemo(dia)filtration, hemo-/peritoneal dialysis, or having received a kidney transplant.
• Received plasma exchange/-pheresis within 12 weeks prior to Screening.

Note: Other protocol defined Inclusion/Exclusion Criteria may apply.

Eligibility last updated 10/25/2024. Questions regarding updates should be directed to the study team contact.