Market Cap

Quest Diagnostics Incorporated Market Capitalization:

$19.43 Billion

USD as of Jan. 1, 2026

business Quest Diagnostics Incorporated Company Profile

Quest Diagnostics Incorporated Main Stock Listing

NYSE: DGX

Market Capitalization History of Quest Diagnostics Incorporated

Market capitalizations are calculated from the opening stock price at the beginning of each month.

Top Competitors by Market Capitalization

Industry: Diagnostics & Research
Company Market Cap (USD)
Thermo Fisher Scientific $222.61 B
Danaher $164.98 B
Siemens Healthineers AG $57.84 B
IDEXX Laboratories, Inc. $53.62 B
Lonza Group Ltd $47.58 B
Sector: Healthcare
Company Market Cap (USD)
Lilly $968.50 B
Johnson & Johnson $499.57 B
AbbVie $405.28 B
Roche $332.12 B
UnitedHealth Group $304.72 B

Yearly evolution of Quest Diagnostics Incorporated market cap

Date Market Cap YoY Change
Jan. 1, 2026 $19.43 B 14.66%
Jan. 1, 2025 $16.95 B 7.24%
Jan. 1, 2024 $15.80 B -10.18%
Jan. 1, 2023 $17.60 B 14.79%
Jan. 1, 2022 $15.33 B 4.55%
Jan. 1, 2021 $14.66 B 16.70%
Jan. 1, 2020 $12.56 B 26.70%
Jan. 1, 2019 $9.92 B -17.45%
Jan. 1, 2018 $12.01 B 15.12%
Jan. 1, 2017 $10.44 B 39.97%
Jan. 1, 2016 $7.46 B -7.60%
Jan. 1, 2015 $8.07 B 35.37%
Jan. 1, 2014 $5.96 B -9.40%
Jan. 1, 2013 $6.58 B -0.22%
Jan. 1, 2012 $6.59 B 1.98%
Jan. 1, 2011 $6.47 B 2.30%
Jan. 1, 2010 $6.32 B 12.81%
Jan. 1, 2009 $5.60 B 0.30%
Jan. 1, 2008 $5.59 B -6.25%
Jan. 1, 2007 $5.96 B 6.17%
Jan. 1, 2006 $5.61 B 3.74%
Jan. 1, 2005 $5.41 B 12.12%
Jan. 1, 2004 $4.83 B 58.05%
Jan. 1, 2003 $3.05 B -22.38%
Jan. 1, 2002 $3.93 B 33.89%
Jan. 1, 2001 $2.94 B

Market capitalization is calculated from the opening stock price at the beginning of each year.

Quest Diagnostics Incorporated Categories

United States languages Healthcare languages Diagnostics & Research
United States Healthcare United States Diagnostics & Research

Stocks & Indices

Quest Diagnostics Incorporated has the following listings and related stock indices.


Stock: NYSE: DGX

Stock: XETR: QDI

What is a company's market capitalization?

The market capitalization of a company, more simply referred to as "market cap", is the total market value of a publicly traded company's outstanding shares. It is often considered as a key indicator of what a company is worth.