| DGX Market Cap History Table | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Below is a table of the DGX market cap history going back to 1/31/2010:
Also see: DGX Shares Outstanding History and DGX YTD Return |
DGX Market Cap History — Quest Diagnostics Capitalization Over Time
As of 7/15/2026 Quest Diagnostics has a market cap of 22.27 billion. Investors often follow the DGX market cap history to compare the size of the company over time.
This page shows DGX market capitalization trends over time, with 66 market cap datapoints presented, dating back to 1/31/2010.
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DGX Historical Market Cap: +5.01% CAGR 
Mouse over chart for data details
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| DGX Stock Price Chart |
| About Quest Diagnostics, Inc. |
| Quest Diagnostics Incorporated is a provider of diagnostic information services. Co. provides diagnostic insights from the results of its laboratory testing to enable people, physicians, and organizations to take action to improve health outcomes. It operates through the DIS segment, which provides diagnostic information services to a range of customers within its primary customer channels: physicians, hospitals, and patients and consumers. We show 66 historical shares outstanding datapoints in our DGX shares outstanding history coverage, used to compute DGX market cap on those dates. Understanding the changing numbers of shares outstanding, the changing share price, and the resulting changing DGX market cap history over the course of time is important for investors interested in comparing DGX's market cap history versus its peers. Many "beginner" or "novice" investors will look at one stock trading at a price of $10 per share and another trading at a price of $20 per share and think the latter company is worth twice as much. Of course, that is a completely meaningless comparison without also knowing how many shares outstanding there are for each of the two companies, and then calculating their respective market caps. Comparing the share price of DGX versus a peer is one thing; comparing DGX market cap versus a peer is a completely different story. Furthermore, via fluctuation both in per-share price and in the number of shares outstanding (via issuance of new shares over time, the repurchase of existing shares), the market cap for a company like DGX can fluctuate over the course of history. With this page we aim to empower investors researching DGX by allowing them to research the DGX market cap history. |
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| Video: The Importance of Market Cap | |
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Video: The Importance of Market Cap
| DGX Share Performance |
| Market Cap Peers |
| Quest Diagnostics (DGX) is categorized under the Healthcare sector; to help you further research historical market cap numbers, below are some other companies in the same sector:
DHR Market Cap History DICE Market Cap History DMK Market Cap History DMPI Market Cap History DMRA Market Cap History DMTK Market Cap History DNAY Market Cap History DNLI Market Cap History DNTH Market Cap History DOMH Market Cap History More Healthcare companies » |
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