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Quest Diagnostics Inc. logo

Quest Diagnostics Inc.

DGX
NYSE: DGX Delayed
189.32USD -2.9%
As of 9 July 2026, Quest Diagnostics Inc. has a market cap of $20.96B USD, ranking #1175 globally and #435 in the United States. It ranks #88 in the Healthcare sector, and #1 in the Diagnostics & Research industry.
Global Rank
1175
1d: -1
1w: +7
1m: -
Country Rank
435
1d: 0
1w: +9
1m: -
Sector Rank
88
1d: 0
1w: +1
1m: -
Industry Rank
1
1d: 0
1w: 0
1m: -
Key Stats
Market Cap
$20.96BUSD
Enterprise Value
$26.97BUSD
Revenue (TTM)
$11.28BUSD
EBITDA (TTM)
$2.23BUSD
Net Income (TTM)
$1.02BUSD
EBITDA Margin
20%
Profit Margin
9.1%
PE Ratio
20.9
Forward PE
17.3
PS Ratio
1.9
PB Ratio
2.9
EV/EBITDA
12.1
Company Profile
Country (HQ)
Sector
Healthcare
Industry
Diagnostics & Research
CEO
James Davis open_in_new
Employees
57,000
Founded
1967
IPO
17 Dec 1996
Website
questdiagnostics.com open_in_new
warningChart data may be delayed
1d 1w 1m 3m 6m 1y
-2.9% -7.2% -3.2% 3.6% 6.2% 7.2%

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Markets

Exchange Ticker Price
NYSE
MIC: XNYS
PRIMARY
DGX
Quest Diagnostics Inc
ISIN: US74834L1008
Shares Out.:
110.696M1 Shares Float: 110.158M2
TV:
SA:
YF:
DGX
GF:
NQ:
DGX
BA:
DGX
MS:
189.32 USD
London Stock Exchange
MIC: XLON
0KSX
Quest Diagnostics Inc
ISIN: US74834L1008
TV:
SA:
YF:
GF:
BA:
MS:
188.85 USD
Borsa Italiana
MIC: XMIL
1QDX
Quest Diagnostics Inc
ISIN: US74834L1008
TV:
SA:
YF:
GF:
BA:
MS:
165.75 EUR
Show all 5 markets
1Market cap is calculated using shares outstanding.
2Float shares are publicly tradable shares, excluding insider-held stock.

About Quest Diagnostics Inc.

Quest Diagnostics Incorporated provides diagnostic testing and services in the United States. The company develops and delivers diagnostic information services, such as routine, non-routine and advanced clinical testing, anatomic pathology testing, and other diagnostic information services. It also provides services under the Quest Diagnostics brand, as well as under the AmeriPath, Dermpath Diagnostics, ExamOne, and Quanum brands to physicians, hospitals, patients and consumers, health plans, government agencies, employers, retailers, pharmaceutical companies and insurers commercial clinical laboratories, and accountable care organizations through a network of laboratories, patient service centers, phlebotomists in physician offices, call centers and mobile phlebotomists, nurses, and other health and wellness professionals. In addition, the company offers risk assessment services for the life insurance industry; healthcare IT healthcare providers and payers; testing and medical director services at hospital laboratories; test offerings in cardiometabolic and endocrine; cancer; clinical drug monitoring and toxicology; infectious disease, including autoimmune; neurology diagnostics, including Alzheimer’s disease; and women’s health, such as prenatal genetic; workplace drug testing, testing urine, hair, and oral fluid specimens services; and employer population health services, including biometric screenings, flu shots, and related preventative services. Further, it provides population health solutions; extended care services; develops in vitro diagnostic tests; laboratory diagnostic information and digital health connectivity systems; underwriting support services, including data gathering, paramedical examinations, and clinical laboratory testing and analytics; and national specimen collection and health data solutions. Quest Diagnostics Incorporated was founded in 1967 and is headquartered in Secaucus, New Jersey.

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