QUEST DIAGNOSTICS INC

Quest Diagnostics provides diagnostic information services and clinical testing solutions derived from routine, non-routine, and specialized laboratory tests. Its operations comprise two primary segments: Diagnostic Information Services, which delivers clinical lab testing, esoteric diagnostics, and diagnostic insights, and Diagnostic Solutions, which includes risk assessment for insurers and healthcare information technology offerings. The company serves physicians across numerous medical specialties, hospitals and health systems, accountable care organizations, health plans, employers, government agencies, pharmaceutical firms, and individual consumers seeking direct testing options.

Headquartered in Secaucus, New Jersey, Quest Diagnostics operates extensively across the United States alongside selective international facilities. Its domestic physical network includes approximately 2,400 patient service centers, around 8,000 total patient access points, laboratories, and specialized logistics assets featuring approximately 5,000 courier vehicles and 18 aircraft. In addition to broad U.S. coverage reaching approximately half of domestic physicians and hospitals annually, the company delivers reference testing to laboratory providers worldwide.

Summary of the business section of Quest Diagnostics's latest annual report, written by StockData.

“Actually paid” adjusts reported pay for changes in the value of equity awards. Shareholder return assumes $100 invested at the start of the measurement period, as disclosed by the company.

“As of December 31, 2025, we have nearly 57,000 employees globally (including LifeLabs’ approximately 6,800), of whom approximately 46,000 are full-time and the remainder are part-time or on-call.”