Early antiretroviral therapy initiation (ARTi) in HIV-1 restricts reservoir size and diversity while preserving immune function, potentially improving opportunities for immunotherapeutic cure strategies. For antibody-based cure approaches, the development of autologous neutralizing antibodies (anAb) after acute/early ARTi is relevant, but poorly understood.We characterize antibody responses in a cohort of 23 participants following ARTi in acute HIV (