B

• First quarter revenues of $2.90 billion, up 9.2% from 2025, with 9.0% organic revenue growth
• First quarter reported diluted earnings per share (“EPS”) of $2.24, up 15.5% from 2025; and adjusted diluted EPS of $2.50, up 13.1% from 2025
• Full year 2026 reported diluted EPS now expected to be between $9.58 and $9.78; and adjusted diluted EPS is expected to be between $10.63 and $10.83

SECAUCUS, N.J., April 21, 2026 /PRNewswire/ — Quest Diagnostics Incorporated (NYSE: DGX), a leading provider of diagnostic information services, today announced financial results for the first quarter ended March 31, 2026.

“Our more than 9% revenue growth, almost entirely organic, and approximately 13% adjusted diluted earnings per share growth reflect our team’s disciplined execution of our strategy to deliver innovative diagnostic solutions for our customers’ evolving needs,” said Jim Davis, Chairman, CEO and President. “We are raising our revenue and EPS guidance for the year, given our robust first quarter performance and continued strategic focus.” 

Recent Highlights:

Serving Clinicians and Health Systems

• Continued to advance our Co-Lab Solutions implementation and joint venture laboratory with Corewell Health, a leading health system in Michigan.
• Scaled our lab and water purity testing solutions for several dialysis clinics and hospitals, extending our reach beyond dialysis clinics owned by Fresenius Medical Care in the United States.

Serving Consumers

• Grew revenues robustly across the consumer channel through our questhealth.com platform and collaborations with top consumer health companies.

Delivering Diagnostic Innovations

• Generated double-digit revenue growth in several areas of Advanced Diagnostics, including for our Quest AD-Detect® blood tests for Alzheimer’s disease and in several clinical areas of advanced cardiometabolic and endocrine disease.
• Formed a research collaboration with City of Hope to study the use of Haystack MRD® as an aid in cancer monitoring and treatment decisions for four solid tumor cancers at 14 U.S. sites.

Driving Operational Excellence

• Launched our AI Companion tool to help patients better understand their lab test reports. Patients have engaged Quest AI Companion approximately 350,000 times since we rolled it out to users of our myQuest patient app earlier this quarter.
• Advanced our planning and design work for Project Nova, our multi-year initiative to transform our order-to-cash processes and systems, with plans to implement our first wave of solutions in the fall of 2027.

Updated Guidance for Full Year 2026

The company updates its full year 2026 guidance as follows:

Note on Non-GAAP Financial Measures

As used in this press release the term “reported” refers to measures under accounting principles generally accepted in the United States (“GAAP”). The term “adjusted” refers to non-GAAP operating performance measures that exclude special items such as restructuring and integration charges, amortization expense, excess tax benefits (“ETB”) associated with stock-based compensation, gains and losses associated with changes in the carrying value of our strategic investments and other items.

Non-GAAP adjusted measures are presented because management believes those measures are useful adjuncts to GAAP results. Non-GAAP adjusted measures should not be considered as an alternative to the corresponding measures determined under GAAP. Management may use these non-GAAP measures to evaluate our performance period over period and relative to competitors, to analyze the underlying trends in our business, to establish operational budgets and forecasts and for incentive compensation purposes. We believe that these non-GAAP measures are useful to investors and analysts to evaluate our performance period over period and relative to competitors, as well as to analyze the underlying trends in our business and to assess our performance. The additional tables attached below include reconciliations of non-GAAP adjusted measures to GAAP measures.

Conference Call Information 

Quest Diagnostics will hold its quarterly conference call to discuss financial results beginning at 8:30 a.m. Eastern Time today.  The conference call can be accessed by dialing 888-455-0391 within the U.S. and Canada, or 773-756-0467 internationally, passcode: 7895081; or via live webcast on our website at www.QuestDiagnostics.com/investor.  We suggest participants dial in approximately 10 minutes before the call.

A replay of the call may be accessed online at www.QuestDiagnostics.com/investor or, from approximately 10:30 a.m. Eastern Time on April 21, 2026 until midnight Eastern Time on May 5, 2026, by phone at 866-388-5361 for domestic callers or 203-369-0416 for international callers.  Anyone listening to the call is encouraged to read our periodic reports, on file with the Securities and Exchange Commission, including the discussion of risk factors and historical results of operations and financial condition in those reports.

About Quest Diagnostics

Quest Diagnostics works across healthcare to create a healthier world, one life at a time. We help connect people, from clinicians to consumers, with laboratory insights that illuminate a path to better health. With a focus on delivering smarter, simpler testing, our insights reveal new avenues to identify and treat disease, inspire healthy behaviors and improve healthcare management. Quest Diagnostics serves half the physicians and hospitals in the United States and one in three adult Americans each year, and our nearly 57,000 employees work together to deliver diagnostic insights that inspire actions to transform lives. www.QuestDiagnostics.com.

Forward Looking Statements

The statements in this press release which are not historical facts may be forward-looking statements. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date that they are made and which reflect management’s current estimates, projections, expectations or beliefs and which involve risks and uncertainties that could cause actual results and outcomes to be materially different. Risks and uncertainties that may affect the future results of the company include, but are not limited to, uncertain and volatile economic conditions, adverse results from pending or future government investigations, lawsuits or private actions, the competitive environment, the complexity of billing, reimbursement and revenue recognition for clinical laboratory testing, changes in government policies, including related to trade, and regulations, changing relationships with customers, payers, suppliers or strategic partners, acquisitions and other factors discussed in the company’s most recently filed Annual Report on Form 10-K and in any of the company’s subsequently filed Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, including those discussed in the “Business,” “Risk Factors,” “Cautionary Factors that May Affect Future Results” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of those reports.

For further information: Wendy Bost, Quest Diagnostics (Media): 973-520-2800, Daniel Haemmerle, Quest Diagnostics (Investors): 973-520-2900

This earnings release, including the attached financial tables, is available online in the Newsroom section at www.QuestDiagnostics.com.