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Quest Diagnostics Incorporated provides diagnostic testing and services in the United States and internationally. The company develops and delivers diagnostic information services, such as routine, non-routine and advanced clinical testing, anatomic pathology testing, and other diagnostic information services. It offers diagnostic information services primarily under the Quest Diagnostics brand, as well as under the AmeriPath, Dermpath Diagnostics, ExamOne, and Quanum brands to physicians, hospitals, patients and consumers, health plans, government agencies, employers, retailers, pharmaceutical companies and insurers, and accountable care organizations through a network of laboratories, patient service centers, phlebotomists in physician offices, call centers and mobile phlebotomists, nurses, and other health and wellness professionals. The company also provides risk assessment services for the life insurance industry; and healthcare organizations and clinicians information technology solutions. Quest Diagnostics Incorporated was founded in 1967 and is headquartered in Secaucus, New Jersey.

Exact Sciences Corporation provides cancer screening and diagnostic test products in the United States and internationally. The company offers Cologuard, a non-invasive stool-based DNA screening test to detect DNA and hemoglobin biomarkers associated with colorectal cancer and pre-cancer. It also provides Oncotype DX Breast Recurrence Score Test; Oncotype DX Breast DCIS Score Test; Oncotype DX Colon Recurrence Score Test; OncoExTra Test for tumor profiling for patients with advanced, metastatic, refractory, relapsed, or recurrent cancer; and Covid-19 testing services. The company's pipeline products focus on enhancing the Cologuard test's performance characteristics and developing blood and other fluid-based tests. It has license agreements with MAYO Foundation for Medical Education and Research, and Johns Hopkins University. Exact Sciences Corporation was incorporated in 1995 and is headquartered in Madison, Wisconsin.

PPD, Inc., together with its subsidiaries, provides drug development services to the biopharmaceutical industry worldwide. The company operates through two segments, Clinical Development Services and Laboratory Services. It offers clinical development services, including product development and consulting, early development, Phases II-IV clinical trial management, accelerated enrollment, peri-and post-approval, and medical communications services. The company also provides laboratory services comprising bioanalytical, biomarker, vaccine science, good manufacturing practice, and central laboratory services. It serves pharmaceutical, biotechnology, medical device, and government organizations, as well as other industry participants. The company has a collaboration with Science 37 to design, build, test, implement, and execute digital trials using Science 37's DCT SaaS-based technology platform. PPD, Inc. was founded in 1985 and is headquartered in Wilmington, North Carolina.

PRA Health Sciences, Inc., a contract research organization, provides outsourced clinical development and data solution services to the biotechnology and pharmaceutical industries worldwide. It operates in two segments, Clinical Research and Data Solutions. The Clinical Research segment offers product registration services, including clinical trial management, project management, regulatory affairs, therapeutic expertise, clinical operations, data and programming, safety and risk management, biostatistics and medical writing, quality assurance, and late phase services. It also provides strategic solutions, such as embedded, functional services provider, staff augmentation, and custom-built development solutions, as well as commercialization services; and early development services for Phase I and Phase IIa studies, as well as bioanalytical analysis. The Data Solutions segment offers data, analytics, technology, and consulting solutions to the life sciences market. Its services include market intelligence services, such as targeting and compensation, and pharmaceutical audit suite services; consulting and services comprising brand analytics, managed markets, commercial effectiveness, and scientific studies/clinical hubs; and technology-enabled products and services that allow clients to access and analyze Symphony Health and integrated third-party data. PRA Health Sciences, Inc. conducts clinical trials in the areas of pharmaceutical development, including oncology, immunology, central nervous system, inflammation, respiratory, cardiometabolic, and infectious diseases. The company was formerly known as PRA Global Holdings, Inc. and changed its name to PRA Health Sciences, Inc. in July 2014. PRA Health Sciences, Inc. was founded in 1976 and is headquartered in Raleigh, North Carolina.