Calvert Holdings

Calvert Holdings, primarily operating through its subsidiary Calvert Laboratories, is a preclinical contract research organization (CRO) that provides essential drug development services to the global biopharmaceutical industry. The company specializes in toxicology, pharmacology, and lead optimization, offering GLP-compliant studies to support IND and NDA regulatory filings. Its expertise spans various therapeutic areas and modalities, including small molecules and biologics, with a particular focus on safety assessment and specialty toxicology. In May 2021, Calvert was acquired by Altasciences, a leading integrated CRO/CDMO, to enhance its preclinical service capabilities in the United States. The Pennsylvania facility continues to serve as a center of excellence for preclinical safety testing within the Altasciences network.