Quest Diagnostics (DGX) - Market capitalization

Market cap: C$28.88 Billion

As of May 2026 Quest Diagnostics has a market cap of C$28.88 Billion. This makes Quest Diagnostics the world's 1110th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of Quest Diagnostics from 1997 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	C$28.88 B	7.21%
2025	C$26.94 B	10.22%
2024	C$24.44 B	18.89%
2023	C$20.56 B	-14.95%
2022	C$24.17 B	-10.62%
2021	C$27.04 B	32.09%
2020	C$20.47 B	10.39%
2019	C$18.55 B	21.14%
2018	C$15.31 B	-9.27%
2017	C$16.87 B	-1.43%
2016	C$17.12 B	21.33%
2015	C$14.11 B	25.93%
2014	C$11.20 B	36.55%
2013	C$8.20 B	-10.54%
2012	C$9.17 B	-1.53%
2011	C$9.31 B	1.16%
2010	C$9.20 B	-20.91%
2009	C$11.64 B	-5.68%
2008	C$12.34 B	20.5%
2007	C$10.24 B	-14.39%
2006	C$11.96 B	0.62%
2005	C$11.89 B	2.41%
2004	C$11.61 B	19.11%
2003	C$9.75 B	10.76%
2002	C$8.80 B	-19.74%
2001	C$10.96 B	10.79%
2000	C$9.90 B	408.87%
1999	C$1.94 B	136.56%
1998	C$0.82 B	13.76%
1997	C$0.72 B

End of Day market cap according to different sources

On May 18th, 2026 the market cap of Quest Diagnostics was reported to be:

C$28.89 Billion

by Nasdaq

C$28.88 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
LabCorp LH	C$28.80 B	-0.28%	🇺🇸 USA
Translate Bio TBIO.defunct	C$3.88 B	-86.56%	🇺🇸 USA
Psychemedics PMD	C$21.63 M	-99.93%	🇺🇸 USA
NeoGenomics NEO	C$1.49 B	-94.81%	🇺🇸 USA
Qiagen QGEN	C$9.57 B	-66.85%	🇳🇱 Netherlands
Enzo Biochem ENZB	C$50.28 M	-99.83%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of Quest Diagnostics (DGX)

Market cap: C$28.88 Billion