Labcorp Holdings Inc. provides laboratory services. It operates through two segments, Diagnostics Laboratories and Biopharma Laboratory Services. The company offers various tests, such as blood chemistry analyses, urinalyses, blood cell counts, thyroid, PAP, hemoglobin A1C and vitamin D, prostate-specific antigens, sexually transmitted diseases, hepatitis C, microbiology cultures and procedures, and alcohol and other substance-abuse tests. It also provides specialty testing services comprising gene-based and esoteric testing; advanced tests target specific diseases; services related to anatomic pathology/oncology, cardiovascular disease, coagulation, diagnostic genetics, endocrinology, infectious disease, women's health, pharmacogenetics, parentage and donor testing, occupational testing services, medical drug monitoring services, chronic disease programs, and kidney stone prevention tests; and health and wellness services to employers and managed care organizations (MCOs). In addition, the company offers online and mobile applications that enable patients to check test results; online applications for providers, MCOs, and accountable care organizations; specimen collection services; and drug development, medical device, and companion diagnostic development solutions, as well as support for crop protection and chemical testing. It serves pharmaceutical, biotechnology, medical device, and diagnostics companies; and MCOs, employer plans, other health insurance providers, governmental agencies, physicians and other healthcare providers, hospitals and health systems, employers, patients and consumers, contract research organizations, crop protection and chemical companies, academic institutions, independent clinical laboratories, and retailers. The company was founded in 1995 is headquartered in Burlington, North Carolina.

Guardant Health, Inc., a precision oncology company, provides blood and tissue tests, data sets, and analytics in the United States and internationally. The company provides Guardant360; Guardant360 LDT; Guardant360 CDx Test; Guardant360 Response Test; Guardant360 TissueNext Test; GuardantINFINITY Test; GuardantConnect, an integrated software-based solution designed for clinical and biopharmaceutical customers to connect patients tested with assays with actionable alterations with potentially relevant clinical studies; GuardantOMNI Test for advanced stage cancer; and GuardantINFORM, an in-silico research platform for tumor evolution and treatment resistance across various biomarker-driven cancers. It offers Shield Test; Guardant Reveal Test for adjuvant treatment selection in early-stage cancer patients; Smart Liquid Biopsy Platform; and Guardant Galaxy, an AI-backed digital pathology platform that helps improve cancer biomarker detection. In addition, the company offers development services, including companion diagnostic development and regulatory approval, clinical study setup, monitoring and maintenance, testing development and support, technologies licensing, and kits fulfillment. The company has a collaboration agreement with Illumina, Inc. for the sharing of specimen samples to advance cancer research. The company was incorporated in 2011 and is headquartered in Palo Alto, California.

QuidelOrtho Corporation provides diagnostic testing solutions. The company operates through Labs, Transfusion Medicine, Point-of-Care, and Molecular Diagnostics business units. The Labs business unit provides clinical chemistry laboratory instruments and tests that measure target chemicals in bodily fluids for the evaluation of health and the clinical management of patients; immunoassay laboratory instruments and tests, which measure proteins as they act as antigens in the spread of disease, antibodies in the immune response spurred by disease, or markers of proper organ function and health; testing products to detect and monitor disease progression across a spectrum of therapeutic areas; and specialized diagnostic solutions. The Transfusion Medicine business unit offers immunohematology instruments and tests used for blood typing to ensure patient-donor compatibility in blood transfusions; and donor screening instruments and tests used for blood and plasma screening for infectious diseases. The Point-of-Care business unit provides instruments and tests to provide rapid results across a continuum of point-of-care settings. The Molecular Diagnostics business unit offers polymerase chain reaction thermocyclers; amplification systems; and sample-to-result molecular instruments and tests for syndromic infectious disease diagnostics. The company sells its products directly to end users through a direct sales force; and through a network of distributors for professional use in physician offices, hospitals, clinical laboratories, reference laboratories, urgent care clinics, universities, retail clinics, pharmacies, wellness screening centers, blood banks, and donor centers, as well as for individual, non-professional, and over-the-counter use. It operates in North America, Europe, the Middle East, Africa, China, and internationally. The company was incorporated in 1979 and is headquartered in San Diego, California.

NeoGenomics, Inc. operates a network of cancer-focused testing laboratories in the United States and the United Kingdom. It operates through Clinical Services and Advanced Diagnostics segments. The company offers testing services to hospitals, academic centers, pathologists, oncologists, clinicians, pharmaceutical companies, and clinical laboratories. It also provides cytogenetics testing services to study normal and abnormal chromosomes and their relationship to diseases; fluorescence in-situ hybridization testing services that focus on detecting and locating the presence or absence of specific DNA sequences and genes on chromosomes; flow cytometry testing services to measure the characteristics of cell populations; and immunohistochemistry and digital imaging testing services to localize cellular proteins in tissue section, as well as to allow clients to visualize scanned slides, and perform quantitative analysis for various stains. In addition, the company also provides molecular testing services, which focus on the analysis of DNA and/or RNA, and the structure and function of genes at the molecular level; morphologic analysis, which is the process of analyzing cells under the microscope by a pathologist for the purpose of diagnosis; and testing services in support of its pharmaceutical clients' oncology programs covering discovery and commercialization. NeoGenomics, Inc. was founded in 2001 and is headquartered in Fort Myers, Florida.

Fulgent Genetics, Inc., together with its subsidiaries, provides clinical diagnostic and therapeutic development solutions to physicians and patients in the United States and internationally. The company's clinical diagnostic solutions include molecular diagnostic testing; genetic testing; anatomic pathology laboratory tests and testing services, such as gastrointestinal pathology, dermatopathology, urologic pathology, breast pathology, neuropathology, and hematopathology; oncology tests and testing services; and sequencer services related to hereditary cancer, reproductive health, and other diseases. Its therapeutic development solutions focus on developing drug candidates for treating a range of cancers using a nanoencapsulation and targeted therapy platform to enhance the therapeutic window and pharmacokinetic profile of new and existing cancer drugs. The company operates picture genetics platform, which includes gene probes, data suppression and comparison algorithms, adaptive learning software, and proprietary laboratory information management systems that helps customers to identify health markers in their personal DNA. It serves insurance, hospitals, medical institutions, other laboratories, governmental bodies, payors, municipalities and large corporations, and patients. The company was formerly known as Fulgent Diagnostics, Inc. and changed its name to Fulgent Genetics, Inc. in August 2016. Fulgent Genetics, Inc. was founded in 2011 and is headquartered in El Monte, California.

Semler Scientific, Inc. provides technology solutions to enhance the clinical effectiveness and efficiency of healthcare providers in the United States. The company's products include QuantaFlo, a four-minute in-office blood flow test that enables healthcare providers to use blood flow measurements as part of their examinations of a patient's vascular condition. It also offers Insulin Insights, a software program that is used by a healthcare provider to optimize outpatient insulin dosing. The company's products serve cardiologists, internists, nephrologists, endocrinologists, podiatrists, family practitioners, healthcare insurance plans, integrated delivery networks, independent physician groups, and companies contracting with the healthcare industry, such as risk assessment groups and retailers. It offers its products through sales representatives and distributors. The company was incorporated in 2007 and is headquartered in Santa Clara, California.

Quanterix Corporation, a life sciences company, engages in development and marketing of digital immunoassay platforms that advances precision health for life sciences research and diagnostics in North America, Europe, the Middle East, Africa, and the Asia Pacific regions. The company offers HD-X instrument, a protein detection platform; and SR-X instrument that enables researchers to apply Simoa detection in an expanded range of applications. It also provides SP-X instrument that is based on Simoa planar array technology for the measurement of multiplex chemiluminescent immunoassays. The company's products include assays include all components required to run enzyme-based immunoassay, such as beads, capture and detector reagents, and enzyme reagents and substrate; and replacement parts, reagents, and antibodies. In addition, it offers contract research services, including sample testing, homebrew assay development, custom assay development, lucent diagnostic, and LDT testing services. The company primarily operates in the areas of neurology, oncology, cardiology, infectious diseases, and inflammation. It sells its products for the life science research sector primarily to laboratories associated with academic and governmental research institutions, as well as pharmaceutical, biotechnology, and contract research companies through a direct field sale, support organizations, and distributors or sales agents. The company was formerly known as Digital Genomics, Inc. and changed its name to Quanterix Corporation in August 2007. Quanterix Corporation was incorporated in 2007 and is headquartered in Billerica, Massachusetts.

ProPhase Labs, Inc. develops and commercializes novel drugs, dietary supplements, and compounds in the United States. It operates through two segments: Diagnostic Services and Consumer Products. The company provides a range of TK supplements, including Legendz XL for male sexual health; and Triple Edge XL, an energy and stamina booster. It offers contract manufacturing services, such as product development, pre-commercialization, production, warehousing, and distribution; COVID-19 diagnostic information services to a range of customers, including health plans, third party payers, and government organizations; and respiratory pathogen panel molecular and DNA testing services, as well as personal genomics products and services. In addition, the company involved in the research, development, manufacture, distribution, marketing, and sale of over the counter (OTC) consumer healthcare products and dietary supplements; and retail operations. The company was formerly known as The Quigley Corporation. ProPhase Labs, Inc. was founded in 1989 and is headquartered in Garden City, New York.