Laboratory Corporation of America Holdings is a global life sciences company that provides vital information to help doctors, hospitals, pharmaceutical companies, researchers, and patients make decisions. Co. reports its business in two segments, LabCorp Diagnostics (Dx) and Labcorp Drug Development (DD). Dx is an independent clinical laboratory business. Co. provides a menu of frequently requested primary testing and specialty testing through a network of primary and specialty laboratories across the U.S. DD provides end-to-end drug development, medical device and companion diagnostic development solutions from early-stage research to clinical development and commercial market access.