Annexon Announces Positive Topline Results from Pivotal Phase 3 Trial for First-in-Class C1q Blocking Antibody ANX005 in Guillain-Barré Syndrome

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Single Infusion of ANX005 30 mg/kg Met Primary Endpoint, Delivering a Highly Statistically Significant and Clinically Meaningful 2.4-fold Improvement in GBS-DS vs. Placebo at Week 8, p=0.0058

ANX005 Demonstrated Early and Sustained Improvements in Key Secondary Endpoints Including Muscle Strength, Nerve Damage and Ventilation

ANX005 Displayed Rapid Target Engagement and was Generally Well-Tolerated Across Doses

Real-World Evidence (RWE) Comparability Data Expected in First Half 2025

Conference call and webcast today at 8:30 a.m. ET

BRISBANE, Calif., June 04, 2024 (GLOBE NEWSWIRE) -- Annexon, Inc. (Nasdaq: ANNX), a biopharmaceutical company advancing a late-stage platform of novel therapies for people living with devastating classical complement-mediated neuroinflammatory diseases of the body, brain, and eye, today announced positive topline results from its randomized placebo-controlled pivotal Phase 3 trial in patients with Guillain-Barré syndrome (GBS). The Phase 3 trial met its primary endpoint, with ANX005 30 mg/kg achieving a highly statistically significant 2.4-fold improvement on the GBS-disability scale (GBS-DS) at week 8 (proportional odds analysis, p = 0.0058).

ANX005 30 mg/kg treatment also demonstrated improvements versus placebo on key secondary endpoints, including early gains in muscle strength by Medical Research Council (MRC) sum score at day 8 (p

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