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Quest Diagnostics

American clinical laboratory company

Quest Diagnostics Incorporated is an American clinical laboratory. A Fortune 500 company, Quest operates in the United States, Puerto Rico, Mexico, and Brazil.3 From Wikipedia, CC BY-SA 4.0

$234.83 down 4.32 (1.81%)Price as of Oct 16, 2026 at 19:58 UTC

Last updated Oct 18, 2026.

Overview

1967Founded1

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  • TickerDGX on NYSE1
  • Industryhealth care1
  • HeadquartersMadison1
  • Founded inNew York City1
  • Websitewww.questdiagnostics.com
  • Legal formDelaware corporation1
  • Incorporated inDE5
  • Business address500 Plaza Drive, Secaucus, Nj 070945
  • Filer categoryLarge accelerated filer5

Quest Diagnostics Incorporated is an American clinical laboratory. A Fortune 500 company, Quest operates in the United States, Puerto Rico, Mexico, and Brazil. Quest also maintains collaborative agreements with various hospitals and clinics across the globe.3

Financials

From the company’s reports to the SEC. Every number links to the filing it came from.

Key numbers, fiscal 2025

14.1%Operating margin7
9.0%Net margin7
11.8%Revenue growth, 20257
13.8%Return on equity7
0.72×Debt to equity7
$1.4BFree cash flow7

What sells

Revenue by product, business segment and region, as the company reports it to the SEC.

Business segments

Diagnostic Information Services Business brought in 98% of the revenue Quest Diagnostics broke down this way in fiscal 2025.

  1. Diagnostic Information Services Business$10.8B798%up 12% from 2024
  2. Other Operating$250.0M72%down 3% from 2024
Business segments by year
Business segments202320242025
Diagnostic Information Services Business$9.0B$9.6B$10.8B
Other Operating$276.0M$258.0M$250.0M

Where the money goes

Where each dollar of revenue went, fiscal 2025

  • Cost of revenue67¢$7.4B
  • Selling, general and admin18¢$2.0B
  • Other costs4¢$392.0M
  • Income tax3¢$314.0M
  • Profit9¢$992.0M

Out of $11.0B in revenue.7

Where each dollar of operating cash went, fiscal 2025

  • Capital spending28¢$527.0M
  • Dividends paid19¢$353.0M
  • Share buybacks24¢$450.0M
  • Kept or used elsewhere29¢$556.0M

Out of $1.9B of cash from operations.7

Financial statements

Revenue8910117$11.0B in 2025+43% since 2019
0$5.0B$10.0B$15.0B2019: $7.7B$7.7B20192020: $9.4B$9.4B2020+22%2021: $10.8B$10.8B2021+14%2022: $9.9B$9.9B2022−8%2023: $9.3B$9.3B2023−6%2024: $9.9B$9.9B2024+7%2025: $11.0B$11.0B2025+12%
Gross profit12$3.6B in 2020+35% since 2019
0$1.0B$2.0B$3.0B$4.0B2019: $2.7B$2.7B20192020: $3.6B$3.6B2020+35%
Operating income8910117$1.6B in 2025+26% since 2019
0$1.0B$2.0B$3.0B2019: $1.2B$1.2B20192020: $2.0B$2.0B2020+60%2021: $2.4B$2.4B2021+21%2022: $1.4B$1.4B2022−40%2023: $1.3B$1.3B2023−12%2024: $1.3B$1.3B2024+7%2025: $1.6B$1.6B2025+16%
Net income8910117$992.0M in 2025+16% since 2019
0$500.0M$1.0B$1.5B$2.0B2019: $858.0M$858.0M20192020: $1.4B$1.4B2020+67%2021: $2.0B$2.0B2021+39%2022: $946.0M$946.0M2022−53%2023: $854.0M$854.0M2023−10%2024: $871.0M$871.0M2024+2%2025: $992.0M$992.0M2025+14%

Every line of the income statement in the latest annual report, as filed.7

Period ending2025-12-312024-12-312023-12-31
Net revenues$11.0B$9.9B$9.3B
Cost of services$7.4B$6.6B$6.2B
Selling, general and administrative$2.0B$1.8B$1.6B
Amortization of intangible assets$154.0M$127.0M$108.0M
Other operating (income) expense, net-$12.0M$1.0M$41.0M
Total operating costs and expenses, net$9.5B$8.5B$8.0B
Operating income$1.6B$1.3B$1.3B
Interest expense, net-$264.0M-$201.0M-$152.0M
Other Nonoperating Income (Expense)$26.0M$30.0M$20.0M
Total non-operating expense, net-$238.0M-$171.0M-$132.0M
Income before income taxes and equity in earnings of equity method investees$1.3B$1.2B$1.1B
Income tax expense-$314.0M-$273.0M-$248.0M
Equity in earnings of equity method investees, net of taxes$42.0M$19.0M$26.0M
Net income$1.0B$921.0M$908.0M
Less: Net income attributable to noncontrolling interests$54.0M$50.0M$54.0M
Net income attributable to Quest Diagnostics$992.0M$871.0M$854.0M
Basic (in dollars per share)$8.87$7.78$7.59
Diluted (in dollars per share)$8.75$7.69$7.49

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The story

Founded by Paul A. Brown in 1967, in New York City.1

1960–1995

Originally founded as Metropolitan Pathology Laboratory, Inc. in 1967 by Paul A. Brown, MD, the clinical laboratory underwent a variety of name changes. In 1969, the company's name changed to MetPath, Inc. with headquarters in Teaneck, New Jersey. By 1982, MetPath was acquired by what was then known as Corning Glass Works and was subsequently renamed Corning Clinical Laboratories.

1996–2000

On December 31, 1996, Quest Diagnostics became an independent company as a spin-off from Corning. Kenneth W. Freeman was appointed as CEO during this transition. Over the next year, Quest acquired a clinical laboratory division of Branford, Connecticut–based Diagnostic Medical Laboratory, Inc. (DML). Two years later in 1999, Quest added SmithKline Beecham Clinical Laboratories to their subsidiaries; which includes a joint venture ownership with CompuNet Clinical Laboratory. The purchase of SmithKline Beecham also included the lab's medical sample transport airline (ICAO: LBQ, call sign: LABQUEST) originally founded in 1988.

In 1997, Quest and Banner Health formed a joint venture creating the Arizona based Sonora Quest laboratory, a business unit of Laboratory Sciences of Arizona. This entity represents the operations of Quest Diagnostics in the Arizona regional market.

2001–2015

From May 2004 to April 2012, Surya Mohapatra served as the company's President and CEO. In 2007 Quest acquired diagnostic testing equipment company AmeriPath. In response to Mohapatra's resignation after eight years with Quest, former Philips Healthcare CEO Stephen Rusckowski was appointed. Under Rusckowski, Quest Diagnostics teamed up with central New England's largest health care system, UMass Memorial Health Care, to purchase its clinical outreach laboratory.

2016–present

In 2016, Quest collaborated with Safeway to bring testing services to twelve of its stores in California, Maryland, Virginia, Texas and Colorado.

By the end of 2017, Quest, in partnership with Walmart, incorporated laboratory testing in about 15 of their locations in Texas and Florida.

In May 2018, the company announced it will become an in-network laboratory provider to UnitedHealthcare starting in 2019, providing access to 48 million plan members.

In September 2018, Quest moved its headquarters from Madison, where it was located since 2007, to Secaucus, New Jersey.

Read the full text

In November 2018, Quest launched QuestDirect, a consumer-initiated testing service that allows patients to order health and wellness lab testing from home.

In March 2020, the company launched a COVID-19 testing service. As of July 2020, Quest had performed more than 9.2 million COVID-19 molecular tests and 2.8 million serology tests.

In April 2024, Quest has added a new blood screening to their AD-Detect product line. This test will analyze the blood for a specific Alzheimer's protein, pTau-217.

In February 2025, Quest acquired select assets of Fresenius Medical Care's Spectra laboratories. Under a separate agreement, Quest now offers clinical testing and lab services related to dialysis and end-stage kidney disease.

From Wikipedia’s article on Quest Diagnostics, shared under CC BY-SA 4.0.6

Leadership

Who has led Quest Diagnostics, and when. Pick a name to see everywhere that person has worked.

Board members and other officers (41)

Subsidiaries and ownership

Subsidiaries

From Wikidata.1

Acquisitions

Partnerships

2005: Forms a strategic alliance with Ciphergen Biosystems to commercialize novel proteomic tests.

From Wikipedia’s article on Quest Diagnostics, shared under CC BY-SA 4.0.6

Former names

  • CORNING CLINICAL LABORATORIES INCDec 13, 1996 to Mar 19, 19975

Timeline

  1. Feb 25, 2022New chief executive J. E. Davis becomes CEO15
  2. May 2, 2012New chief executive Steve Rusckowski becomes CEO1
  3. Feb 17, 2006New chief executive Surya N. Mohapatra becomes CEO17
  4. Dec 26, 1996Went public Listed on NYSE1
  5. 1967Founded Founded in New York City1

Recent filings

  1. Oct 6, 20268-K CURRENT REPORT
  2. Oct 2, 20264
  3. Sep 3, 20264
  4. Sep 1, 2026144
  5. Aug 31, 20264
  6. Aug 28, 2026144
  7. Aug 14, 2026SCHEDULE 13G/A
  8. Jul 29, 20264
  9. Jul 28, 2026144
  10. Jul 27, 20264
  11. Jul 27, 20264
  12. Jul 27, 20264
  13. Jul 27, 20264
  14. Jul 27, 20264
  15. Jul 27, 20264

Every filing from the last three years, summarized. The full record is on SEC EDGAR.2

Sources

The numbers on this page point here. Each one links to the record it came from.

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