May 2026 Sanofi continued expanding its rare immunology portfolio by advancing rilzabrutinib across multiple autoimmune diseases, including pemphigus vulgaris, with ongoing Phase III clinical development and global regulatory interactions supporting future commercialization plans.
October 2025 Principia Biopharma (Sanofi) announced additional clinical development activities for rilzabrutinib, including continued advancement of the PEGASUS Phase III trial evaluating the oral BTK inhibitor for pemphigus vulgaris. The program expansion included additional global trial sites and patient enrollment to support regulatory submissions.
September 2025 argenx entered a strategic collaboration with Zai Lab to expand commercialization and clinical development of autoimmune therapies across Greater China, supporting broader regional development of argenx's FcRn inhibitor portfolio, including programs relevant to pemphigus vulgaris.