New Jersey-based Quest Diagnostics Incorporated (DGX) is a leading provider of diagnostic information services, offering a wide range of laboratory testing and data-driven healthcare insights. The company conducts routine, advanced, and specialized clinical tests, including pathology, genetic, and disease-specific diagnostics, to support the detection, monitoring, and treatment of conditions such as cancer, cardiovascular disease, and infectious illnesses. The company has a market capitalization of $21.8 ...