Quest Diagnostics
Get verified emails for Quest Diagnostics employeesAbout Quest Diagnostics
Quest Diagnostics is a medical and diagnostic laboratory company founded in 1967 and headquartered in Secaucus, New Jersey. It provides clinical laboratory services and diagnostic insights drawn from a large database of clinical lab results, and those services support disease identification, treatment decisions, healthy-behavior initiatives, and health care management.
Physicians can access more than 3,000 tests through the company, along with anatomic pathology services, interpretive consultation through its medical and scientific staff, and connectivity solutions for healthcare organizations and clinicians. Strong in cancer diagnostics, Quest Diagnostics is also a leading provider of pre-employment drugs-of-abuse screening for employers and risk assessment services for the life insurance industry.
Quest Diagnostics serves one in three adult Americans and half of physicians and hospitals in the United States. It has more than 47,000 employees. Laboratories operate in most major metropolitan areas in the U.S. as well as Mexico, the UK, and India, with about 2,250 patient service centers and testing performed for about 550,000 patients on a typical workday.
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Insights
Updated 31 Aug 2026Quest Diagnostics is being discussed in the market mainly as a large healthcare and medical research company. Recent third-party commentary has put it side by side with another healthcare name on dividends, institutional ownership, risk, earnings, profitability, valuation and analyst recommendations. That points to a classic quality-and-fundamentals lens, not a company-specific operational announcement in the supplied sources.
Investor interest looks constructive. Jefferies Financial Group disclosed a new position of 17,375 shares valued at approximately $3.683 million, and the same source says other large investors also recently made moves in the stock. That suggests continuing institutional attention.
No supplied source gives Quest Diagnostics operating updates, earnings results, hiring activity, or consumer sentiment. The clearest signal in the material is institutional ownership interest, not a change in strategy or end-market demand.
Frequently asked questions
Quest Diagnostics is headquartered in Secaucus, New Jersey, United States.
Quest Diagnostics has 10001+ employees according to its company profile.
Quest Diagnostics operates in the Medical and Diagnostic Laboratories sector. Public valuation figures are not always disclosed for private companies.