– New data from the Phase 3 INDIGO open-label extension will include the longer-term flare protection and safety data of obexelimab in IgG4-RD –

– Additional analyses will assess glucocorticoid-associated toxicity and vaccine responses –

WALTHAM, Mass., Sept. 22, 2026 (GLOBE NEWSWIRE) -- Zenas BioPharma, Inc. ("Zenas" or the "Company") (NASDAQ:ZBIO), a clinical-stage global biopharmaceutical company advancing therapies for patients living with autoimmune and inflammatory diseases, today announced that new data from the Phase 3 INDIGO trial evaluating obexelimab in immunoglobulin G4-related disease (IgG4-RD) will be presented at two upcoming scientific meetings: the 6th International Symposium on IgG4-Related Disease, taking place October 8-10, in Cambridge, Massachusetts, and American College of Rheumatology (ACR) Convergence 2026, taking place November 6-11, 2026, in Orlando, Florida.

Longer-term flare protection and safety data from the INDIGO open-label extension will be presented on October 10 at the 6th International Symposium on IgG4-Related Disease. Additional presentations across both meetings include analyses evaluating glucocorticoid-associated toxicity and vaccine responses among patients with IgG4-RD treated with obexelimab.