Rallybio Corporation, a clinical-stage biotechnology company, engages in discovering, developing, manufacturing, and delivering therapies that enhance the lives of patients suffering from severe and rare diseases. Its lead product candidate is RLYB212, a monoclonal anti-HPA-1a antibody that is in Phase I clinical trial for the prevention of fetal and neonatal alloimmune thrombocytopenia (FNAIT). The company is also developing RLYB211, a polyclonal anti-HPA-1a antibody that is in a Phase 1/2 clinical trial for the prevention of FNAIT RLYB114, a pegylated complement factor 5 (C5)-targeted Affibody molecule in preclinical development for the treatment of complement-mediated ophthalmic diseases and RLYB116, a subcutaneously administered inhibitor of C5 for the treatment of patients with paroxysmal nocturnal hemoglobinuria and generalized myasthenia gravis. Rallybio has collaboration with Exscientia for the development of small molecule therapeutics for rare diseases. Rallybio Corporation was founded in 2018 and is headquartered in New Haven, Connecticut.