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Quest Diagnostics is one of the world’s leading providers of diagnostic information services and a major independent clinical laboratory operator in the United States. Headquartered in Secaucus, New Jersey, the company supports the healthcare ecosystem by generating diagnostic insights drawn from one of the world’s largest collections of de-identified clinical laboratory results. These insights help physicians, hospitals, employers, insurers, and individual consumers make informed decisions about health and wellness. Founded in 1967 as Metropolitan Pathology Laboratory in New York City, the company grew through a series of acquisitions and structural changes before becoming an independent public company in 1996. Over the decades, Quest expanded its capabilities to include advanced genomic testing, molecular diagnostics, esoteric testing, digital pathology solutions, and consumer-initiated lab services. Quest Diagnostics serves one in three adult Americans each year and supports roughly half of U.S. physicians and hospitals. Its operational network includes approximately 8,000 patient access points across North America, including about 2,400 patient service centers, backed by dozens of clinical laboratories, thousands of courier vehicles, and dedicated air transport resources. This infrastructure allows Quest to offer thousands of laboratory tests, from routine blood panels to complex cancer and rare-disease diagnostics. In its most recent reporting year, the company generated revenues of roughly $9.87 billion and employed between 55,000 and 56,000 people, including a large team of scientists, medical experts, and diagnostic specialists. Quest Diagnostics is publicly traded on the New York Stock Exchange under the ticker symbol DGX and is included in the S&P 500 index. Today, Quest continues to advance the future of diagnostics through innovation, expanded partnerships, investment in technology, and a growing portfolio of services designed to support preventive care, chronic disease management, and population health.