Zenas BioPharma, Inc. Common StockPositive Phase 3 results for obexelimab in IgG4-RD, meeting primary and secondary endpoints with 56% flare risk reduction.

Zenas BioPharma announced positive results from the Phase 3 INDIGO trial of obexelimab for Immunoglobulin G4-Related Disease. The study met its primary and all key secondary endpoints, demonstrating a 56% reduction in flare risk compared to placebo and a significant decrease in glucocorticoid use and related toxicities. The findings were presented at the EULAR 2026 Congress and published in the New England Journal of Medicine. The trial, the largest ever conducted for this disease, showed that over 73% of treated patients remained flare-free through 52 weeks with a safety profile comparable to placebo. Following these results, the company submitted a Biologics License Application to the FDA in May and continues to advance its clinical pipeline, with additional data expected later this year from its Phase 2 trial for systemic lupus erythematosus.
Zenas BioPharma, Inc. Common StockPositive Phase 3 results for obexelimab in IgG4-RD, meeting primary and secondary endpoints with 56% flare risk reduction.