Latest Quest Diagnostics News & Updates

See the latest news and media coverage for Quest. We track all announcements, press releases, and industry mentions in real time, all in one place.

Quest Diagnostics (Quest)

Medical diagnostic testing and laboratory services provider

questdiagnostics.com

Headquarters: Secaucus, United States
Founded year: 1967
Company type: Public company
Number of employees: 33,000+
Industry: Healthcare Facilities & Services

Last updated October 22

Latest news about Quest Diagnostics (Quest)

In short: Quest reported a Quanum cybersecurity breach, beat Q3 revenue expectations, and raised full-year guidance.

Company announcements

October 22 Quest

Quest Diagnostics reports Q3 2026 earnings and raises full-year guidance

Third-quarter revenue grew 10% to $3.1 billion with adjusted EPS up 15%. The company lifted full-year revenue and profit expectations driven by strong organic growth.

September 26 Quest

Quest Diagnostics outlines its long-term growth strategy

The company projects 4-5% revenue CAGR and 7-9% EPS CAGR beyond 2025, driven by Project Nova and advanced diagnostics investments.

September 21 Quest

Quest reveals high tick-borne pathogen co-detection rates

National data highlights prevalent Babesia antibodies alongside Lyme disease, informing clinical awareness of complex exposures.

August 24 Quest

Quest Diagnostics launches new FDA-cleared blood test for Alzheimer's pathology assessment

The company adds Roche pTau217 to its AD-Detect portfolio and introduces a multi-biomarker lab-developed test with low indeterminate rates.

Media coverage

October 22 Associated Press

Quest Diagnostics reports cyber breach affecting 'certain patient records'

Medical laboratory operator Quest Diagnostics said it learned of a cyber breach of one of its systems this week, likely compromising some records for patients.

October 22 The Globe and Mail

Quest’s (NYSE:DGX) Q3 2026: beats on revenue

Detailed price information for Quest Diagnostics Inc (DGX-N) from The Globe and Mail including charting and trades.

October 21 Chief Healthcare Executive

Data Breach Affects 12M Quest Diagnostics Patients | Chief Healthcare Executive

AMCA has not given Quest or Optum360 more information about the incident, including which information of which individuals could have been affected. Quest said it...

October 19 Quiver Quantitative

Quest Diagnostics Slides as Investors Weigh Medicare Lab Payment Cut Risk | Quiver Quantitative

Quest Diagnostics (DGX) is down 12.8% today. Here is some analysis on what might have caused this price movement.Analysis: The most likely driver appears to...

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