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benzinga Corporate Catalyst Impact 75/100 ● positive

AC Immune Says Investigational Parkinson’s Drug Shows 100% Antibody Response

Sep 23, 2026, 3:08 PM UTC · Primary ticker $ACIU

AC Immune announced positive safety and immunogenicity results from Part 1 of its Phase 2 VacSYn trial for ACI-7104, an investigational Parkinson's drug. All treated patients developed antibodies, and the company plans to refine its approach for an expanded Phase 2 trial, indicating progress in its drug development pipeline.

AC Immune reported that its Parkinson's drug, ACI-7104, met all primary endpoints in Part 1 of its Phase 2 trial, demonstrating 100% antibody response and good safety. This is a significant positive development for ACIU as it de-risks the drug's immunogenicity and safety profile, paving the way for an expanded Phase 2 trial focused on clinical activity. While these are early-stage results and do not yet prove clinical efficacy, the strong immunogenic response and clear antibody penetration are crucial steps. Traders should view this as a long-term opportunity, as successful progression through clinical trials could lead to substantial value creation, though regulatory hurdles and future trial outcomes remain key risks.

$ACIU positive Positive Phase 2 trial results for lead drug candidate
Source: benzinga
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