Sifting through countless of stocks in the Health Care Providers & Services industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in Labcorp Holdings Inc. or Quest Diagnostics Incorporated because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.

Read on to learn how Labcorp Holdings Inc. and Quest Diagnostics Incorporated compare based on key financial metrics to determine which better meets your investment needs.

About Labcorp Holdings Inc. and Quest Diagnostics Incorporated

Labcorp Holdings Inc. provides laboratory services. It operates through two segments, Diagnostics Laboratories and Biopharma Laboratory Services. The company offers various tests, such as blood chemistry analyses, urinalyses, blood cell counts, thyroid, PAP, hemoglobin A1C, prostate-specific antigens, sexually transmitted diseases, hepatitis C, vitamin D, microbiology cultures and procedures, and alcohol and other substance-abuse tests. It also provides specialty testing services comprising gene-based and esoteric testing; advanced tests target specific diseases; services related to anatomic pathology/oncology, cardiovascular disease, coagulation, diagnostic genetics, endocrinology, infectious disease, women's health, pharmacogenetics, parentage and donor testing, occupational testing services, medical drug monitoring services, chronic disease programs, and kidney stone prevention tests; and health and wellness services to employers and managed care organizations (MCOs). In addition, the company offers online and mobile applications that enable patients to check offerings, schedule PSC visits, check-in upon PSC arrival, complete documentation, access tests and test results, and manage their accounts; online applications for providers, MCOs, and accountable care organizations; specimen collection services; and drug development, medical device, and companion diagnostic development solutions, as well as support for crop protection and chemical testing. It serves pharmaceutical, biotechnology, medical device, and diagnostics companies; and MCOs, employer plans, other health insurance providers, governments, physician, large provider organizations, other healthcare providers, hospitals and health systems, patients and consumers, crop protection and chemical companies, academic institutions, independent clinical laboratories, and retailers. The company was founded in 1995 and is headquartered in Burlington, North Carolina.

Quest Diagnostics Incorporated provides diagnostic testing and services in the United States and internationally. 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 diagnostic information services primarily 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, emerging retail healthcare providers, 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; and healthcare organizations and clinicians information technology solutions. Quest Diagnostics Incorporated was founded in 1967 and is headquartered in Secaucus, New Jersey.

Latest Health Care Providers & Services and Labcorp Holdings Inc., Quest Diagnostics Incorporated Stock News

As of December 10, 2025, Labcorp Holdings Inc. had a $21.7 billion market capitalization, compared to the Health Care Providers & Services median of $1.2 million. Labcorp Holdings Inc.’s stock is up 15.6% in 2025, up 1.3% in the previous five trading days and up 12.65% in the past year.

Currently, Labcorp Holdings Inc.’s price-earnings ratio is 25.7. Labcorp Holdings Inc.’s trailing 12-month revenue is $13.8 billion with a 6.2% net profit margin. Year-over-year quarterly sales growth most recently was 8.6%. Analysts expect adjusted earnings to reach $16.332 per share for the current fiscal year. Labcorp Holdings Inc. currently has a 1.1% dividend yield.

As of December 10, 2025, Quest Diagnostics Incorporated had a $20.0 billion market cap, putting it in the 87th percentile of all stocks. Quest Diagnostics Incorporated’s stock is up 20.4% in 2025, down 1.4% in the previous five trading days and up 14.08% in the past year.

Currently, Quest Diagnostics Incorporated’s price-earnings ratio is 21.1. Quest Diagnostics Incorporated’s trailing 12-month revenue is $10.9 billion with a 8.9% net profit margin. Year-over-year quarterly sales growth most recently was 13.2%. Analysts expect adjusted earnings to reach $9.811 per share for the current fiscal year. Quest Diagnostics Incorporated currently has a 1.8% dividend yield.

How We Compare Labcorp Holdings Inc. and Quest Diagnostics Incorporated Stock Grades

Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at Labcorp Holdings Inc. and Quest Diagnostics Incorporated’s stock grades to see how they measure up against one another.

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Labcorp Holdings Inc. and Quest Diagnostics Incorporated Growth Grades

Company	Ticker	Growth
Labcorp Holdings Inc.	LH	C
Quest Diagnostics Incorporated	DGX	A

The foundation of growth investing is seeking out stocks of companies exhibiting strong, consistent and prolonged growth that is expected to continue into the future.

In order to compute the growth score and assign it a letter grade, the percentile ranks for each of three components‐consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations‐must be determined. These three rank figures are added together, and the sum is ranked against the entire stock universe to arrive at a company’s Growth Score to create an equal distribution of grades.

The companies in the bottom 20% of the stock universe receive Growth Grades of F, considered to be very weak, while those in the top 20% receive A grades, which are considered very strong.

Labcorp Holdings Inc. has a Growth Score of 60, which is Average. Quest Diagnostics Incorporated has a Growth Score of 81, which is Very Strong.

The Growth Grade Winner: Quest Diagnostics Incorporated

As you can clearly see from the Growth Grade breakdown above, Quest Diagnostics Incorporated has a more attractive growth grade than Labcorp Holdings Inc.. For investors who focus solely on how a company is growing relative to other companies in the same industry, Quest Diagnostics Incorporated could be a good stock to add to their portfolio. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Labcorp Holdings Inc. and Quest Diagnostics Incorporated’s Quality Grades

Company	Ticker	Quality
Labcorp Holdings Inc.	LH	A
Quest Diagnostics Incorporated	DGX	A

Like the Value Grade, AAII’s A+ Investor Quality Grade comes from the percentile rank of key metrics. Specifically, the Quality Score is the percentile rank of the average of the percentile ranks of return on assets (ROA), return on invested capital (ROIC), gross profit relative to assets, buyback yield, change in total liabilities to assets, accruals, Z double prime bankruptcy risk (Z) score and the F-Score.

The score is variable, meaning it can consider all eight measures or, should any of the eight measures not be valid, the remaining measures that are valid. To be assigned a Quality Score, stocks must have a valid (non-null) measure and corresponding ranking for at least four of the eight quality measures.

The Quality Score is used to assess the underlying “quality” of a particular stock. A higher-quality stock possesses traits associated with upside potential and reduced downside risk. Backtesting of the Quality Grade shows that stocks with higher grades, on average, outperformed stocks with lower grades over the period of 1998 through 2019.

Stocks receive better grades (higher scores) for having higher scores for the quality subcomponents and worse grades (lower scores) for lower scores for the subcomponents.

Labcorp Holdings Inc. has a Quality Score of 95, which is Very Strong. Quest Diagnostics Incorporated has a Quality Score of 94, which is Very Strong.

The Quality Grade Winner: It’s a Tie!

Looking at the Quality Grade breakdown above, both Labcorp Holdings Inc. and Quest Diagnostics Incorporated have a grade of A. For investors who focus solely on a company’s overall quality, you will need to conduct further research into both companies to see if they are a good fit for your portfolio. As a good rule of thumb, you should always analyze multiple factors based on a wide range of metrics before choosing a company to invest in.

Labcorp Holdings Inc. and Quest Diagnostics Incorporated’s Momentum Grades

Company	Ticker	Momentum
Labcorp Holdings Inc.	LH	C
Quest Diagnostics Incorporated	DGX	C

Momentum grades help to uncover stocks experiencing anomalously high rates of return; research finds that stocks with high relative levels of momentum tend to outperform, whereas those with low levels of momentum tend to continue underperforming. Momentum is based on the price change of a stock over a specified period relative to all other stocks.

Typically, AAII looks at the weighted relative strength over the trailing four quarters. The weighted four-quarter relative strength rank is the relative price change for each of the past four quarters. The most recent quarterly price change is given a weight of 40% and each of the three previous quarters are given a weighting of 20%.

Labcorp Holdings Inc. has a Momentum Score of 49, which is Average. Quest Diagnostics Incorporated has a Momentum Score of 54, which is Average.

The Momentum Stock Winner: No Clear Winner

Neither Labcorp Holdings Inc. or Quest Diagnostics Incorporated has a strong enough Momentum Grade to be considered a “winner.” Investors considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if Labcorp Holdings Inc. or Quest Diagnostics Incorporated is the better investment when it comes to momentum.

Other Labcorp Holdings Inc. and Quest Diagnostics Incorporated Grades

In addition to Momentum, Quality and Growth, A+ Investor also provides grades for Value and Estimate Revisions.

Earnings estimate revisions scores take into account the magnitude of a company’s earnings surprise in its last two reported fiscal quarters. Often, surprises beget further surprises‐or at least continued sales growth (the exact opposite is generally true, too).

Successful stock investing involves buying low and selling high, so stock valuation is an important consideration for stock selection. Buying stocks that are going to go up typically means buying stocks that are undervalued in the first place, although momentum investors may argue that point.

These 2 key factors, when combined with the above, provide a holistic view into a particular stock. Further, by joining A+ Investor you can see whether Labcorp Holdings Inc. and Quest Diagnostics Incorporated pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Labcorp Holdings Inc. or Quest Diagnostics Incorporated Stock?

Overall, Labcorp Holdings Inc. stock has a Growth Score of 60, Momentum Score of 49 and Quality Score of 95.

Quest Diagnostics Incorporated stock has a Growth Score of 81, Momentum Score of 54 and Quality Score of 94.

Comparing Labcorp Holdings Inc. and Quest Diagnostics Incorporated’s grades, scores and metrics can act as a solid basis to determine whether they may be a good investment or not. You’ll also want to look at your portfolio’s asset allocation as well as your risk tolerance and financial goals to see if either of these stocks would make a good fit for you. AAII can help you figure out which investments align with your individual needs and preferences.

Investors are encouraged to do their own due diligence and research. In this way, individuals can effectively become managers of their own assets‐without having to rely on others for financial independence. You can count on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis.

A+ Investor adds to our qualitative teaching with a powerful data suite to help you whittle down investment choices to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith, and we accept no liability for any errors or omissions. The full disclaimer can be read here.