With a market cap of $19.3 billion, Quest Diagnostics Incorporated (DGX) is a leading provider of diagnostic testing and information services, offering routine, advanced, and specialty clinical testing to healthcare providers, patients, and organizations in the United States and internationally. It operates under brands such as Quest Diagnostics, AmeriPath, Dermpath Diagnostics, ExamOne, and Quanum, delivering services through an extensive network of laboratories and healthcare professionals. The Secaucu ...