This is a Phase 1b/2 single and multiple dose trial evaluating the safety, tolerability, clinical activity, pharmacokinetics, pharmacodynamics, and immunogenicity of subcutaneous administration of navenibart in participants with type I or type II HAE in 3 dose cohorts. The first cohort will receive 1 dose of navenibart; the second and third cohorts will receive 2 sequential doses. This is the first trial of navenibart in participants with HAE and the first evaluation of a multiple-dose regimen. After the required follow up period, participants who are willing and eligible to consent can begin participation in the long-term open label extension study (STAR-0215-202, ALPHA-SOLAR; NCT06007677).
