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flag Zenas BioPharma's obexelimab reduced IgG4-related disease flares by 56% in Phase 3 trial, meeting its primary endpoint.

flag Zenas BioPharma's Phase 3 INDIGO trial of obexelimab for IgG4-related disease met its primary endpoint, showing a 56% reduction in disease flare risk over 52 weeks versus placebo, with significant improvements across all secondary endpoints and a favorable safety profile. flag The company plans to file for U.S. approval in Q2 2026 and for European approval later in the year. flag Despite the positive results, shares dropped over 55% as the outcome fell short of Wall Street expectations, particularly compared to Amgen’s Uplizna, which showed an 87% reduction in flares.

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