Q2 Earnings Highs And Lows: Quest (NYSE:DGX) Vs The Rest Of The Testing & Diagnostics Services Stocks

September 03, 2025 at 23:35 PM EDT

DGX Cover Image

The end of the earnings season is always a good time to take a step back and see who shined (and who not so much). Let’s take a look at how testing & diagnostics services stocks fared in Q2, starting with Quest (NYSE: DGX).

The testing and diagnostics services industry plays a crucial role in disease detection, monitoring, and prevention, serving hospitals, clinics, and individual consumers. This sector benefits from stable demand, driven by an aging population, increased prevalence of chronic diseases, and growing awareness of preventive healthcare. Recurring revenue streams come from routine screenings, lab tests, and diagnostic imaging, with reimbursement from Medicare, Medicaid, private insurance, and out-of-pocket payments. However, the industry faces challenges such as pricing pressures, regulatory compliance, and the need for continuous investment in new testing technologies. Looking ahead, industry tailwinds include the expansion of personalized medicine, increased adoption of at-home and rapid diagnostic tests, and advancements in AI-driven diagnostics that enhance accuracy and efficiency. However, headwinds such as reimbursement uncertainties, competition from decentralized testing solutions, and regulatory scrutiny over test validity and cost-effectiveness may impact profitability. Adapting to evolving healthcare models and integrating automation will be key for sustaining growth and maintaining operational efficiency.

The 5 testing & diagnostics services stocks we track reported a strong Q2. As a group, revenues beat analysts’ consensus estimates by 2.6%.

Luckily, testing & diagnostics services stocks have performed well with share prices up 23.8% on average since the latest earnings results.

Quest (NYSE: DGX)

Processing approximately one-third of the adult U.S. population's lab tests annually, Quest Diagnostics (NYSE: DGX) provides laboratory testing and diagnostic information services to patients, physicians, hospitals, and other healthcare providers across the United States.

Quest reported revenues of $2.76 billion, up 15.2% year on year. This print exceeded analysts’ expectations by 1.4%. Overall, it was a strong quarter for the company with an impressive beat of analysts’ sales volume estimates and full-year revenue guidance slightly topping analysts’ expectations.

Interestingly, the stock is up 7.8% since reporting and currently trades at $179.51.

Is now the time to buy Quest? Access our full analysis of the earnings results here, it’s free.

Best Q2: Guardant Health (NASDAQ: GH)

Pioneering the field of "liquid biopsy" with technology that can identify cancer-specific genetic mutations from a simple blood draw, Guardant Health (NASDAQ: GH) develops blood tests that detect and monitor cancer by analyzing tumor DNA in the bloodstream, helping doctors make treatment decisions without invasive biopsies.

Guardant Health reported revenues of $232.1 million, up 30.9% year on year, outperforming analysts’ expectations by 10%. The business had an exceptional quarter with full-year revenue guidance exceeding analysts’ expectations and a beat of analysts’ EPS estimates.

Guardant Health scored the biggest analyst estimates beat, fastest revenue growth, and highest full-year guidance raise among its peers. The market seems happy with the results as the stock is up 42.4% since reporting. It currently trades at $64.42.

Is now the time to buy Guardant Health? Access our full analysis of the earnings results here, it’s free.

Weakest Q2: NeoGenomics (NASDAQ: NEO)

Operating a network of CAP-accredited and CLIA-certified laboratories across the United States and United Kingdom, NeoGenomics (NASDAQ: NEO) provides specialized cancer diagnostic testing services, including genetic analysis, molecular testing, and pathology consultation for oncologists and healthcare providers.

NeoGenomics reported revenues of $181.3 million, up 10.2% year on year, falling short of analysts’ expectations by 0.9%. It was a softer quarter as it posted a significant miss of analysts’ full-year EPS guidance estimates and full-year EBITDA guidance missing analysts’ expectations significantly.

NeoGenomics delivered the weakest performance against analyst estimates and weakest full-year guidance update in the group. Interestingly, the stock is up 26.3% since the results and currently trades at $8.18.

Read our full analysis of NeoGenomics’s results here.

Labcorp (NYSE: LH)

With over 600 million tests performed annually and involvement in 90% of FDA-approved drugs in 2023, Labcorp (NYSE: LH) provides laboratory testing services and drug development solutions to doctors, hospitals, pharmaceutical companies, and patients worldwide.

Labcorp reported revenues of $3.53 billion, up 9.5% year on year. This number topped analysts’ expectations by 1%. Taking a step back, it was a satisfactory quarter as it also recorded a narrow beat of analysts’ full-year EPS guidance estimates but a slight miss of analysts’ organic revenue estimates.

The stock is up 9.2% since reporting and currently trades at $273.84.

Read our full, actionable report on Labcorp here, it’s free.

RadNet (NASDAQ: RDNT)

With over 350 imaging facilities across seven states and a growing artificial intelligence division, RadNet (NASDAQ: RDNT) operates a network of outpatient diagnostic imaging centers across the United States, offering services like MRI, CT scans, PET scans, mammography, and X-rays.

RadNet reported revenues of $498.2 million, up 8.4% year on year. This result beat analysts’ expectations by 1.6%. Overall, it was an exceptional quarter as it also recorded a beat of analysts’ EPS estimates and an impressive beat of analysts’ same-store sales estimates.

RadNet had the slowest revenue growth among its peers. The stock is up 33% since reporting and currently trades at $70.95.

Read our full, actionable report on RadNet here, it’s free.

Market Update

Thanks to the Fed’s rate hikes in 2022 and 2023, inflation has been on a steady path downward, easing back toward that 2% sweet spot. Fortunately (miraculously to some), all this tightening didn’t send the economy tumbling into a recession, so here we are, cautiously celebrating a soft landing. The cherry on top? Recent rate cuts (half a point in September 2024, a quarter in November) have propped up markets, especially after Trump’s November win lit a fire under major indices and sent them to all-time highs. However, there’s still plenty to ponder — tariffs, corporate tax cuts, and what 2025 might hold for the economy.

Want to invest in winners with rock-solid fundamentals? Check out our Top 5 Quality Compounder Stocks and add them to your watchlist. These companies are poised for growth regardless of the political or macroeconomic climate.

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