Quest Diagnostics Inc Stock Price, News & Analysis

Haystack Oncology (Quest Diagnostics NYSE: DGX) announced a research collaboration with Rutgers Cancer Institute and RWJBarnabas Health to evaluate Haystack MRD, a circulating tumor DNA (ctDNA) test, in a prospective phase II trial titled MRD-PORT (NCT06979661) to guide postoperative radiation and systemic therapy in stage II/III non-small cell lung cancer.

Key context: an April 2025 NEJM study found Haystack MRD identified clinical complete response at a median of 1.4 months vs >6 months by imaging, and the test received FDA Breakthrough Device Designation in August 2025.

Octave Bioscience announced a strategic collaboration with Quest Diagnostics (NYSE: DGX) to make the Octave® Multiple Sclerosis Disease Activity (MSDA) Test available through Quest’s approximately 7,000 U.S. patient service centers and in-office phlebotomists starting December 1, 2025.

The MSDA Test measures 18 validated protein biomarkers, is described as clinically and analytically validated, is reimbursed by multiple payers, and is supported by a patient affordability program. Quest also has first rights to consider providing specimen collection for future Octave tests. The MSDA Test is performed in Octave’s CLIA/CAP/CLEP-certified Menlo Park laboratory.

Quest Diagnostics (NYSE: DGX) announced that its Board declared a quarterly cash dividend of $0.80 per share. The dividend is payable on January 28, 2026 to shareholders of record as of January 13, 2026. This provides a scheduled cash return to common shareholders and sets the key dates for eligibility and payment.

Quest Diagnostics (NYSE: DGX) announced that Sam Samad, executive vice president and chief financial officer, will speak at Citi's 2025 Global Healthcare Conference in Miami on Tuesday, December 2, 2025 at 3:15 p.m. ET.

The session will be a fireside chat with Q&A and will be webcast live on the company's investor relations page at ir.QuestDiagnostics.com. An archived webcast will be posted within 24 hours and will remain available through January 2, 2026.

Quest Diagnostics (NYSE: DGX) published a study showing two AD-Detect blood-test panels accurately identify Alzheimer’s pathology in symptomatic patients. In an intended-use cohort of 215 patients (46% amyloid PET-positive), both panels met a 91% sensitivity and 91% specificity threshold used for confirmatory testing. The three-biomarker panel (AB42/40 + p-tau217 + ApoE4) yielded PPV 88%, NPV 91% and a 10% indeterminate rate. The two-biomarker panel (AB42/40 + p-tau217) showed PPV 87%, NPV 91% and a 15% indeterminate rate. Quest launched the two-biomarker panel in April 2025 and plans a version of the three-biomarker test in Q1 2026.

Results meet recommended thresholds from Alzheimer's Association and CEOi for confirmatory blood-based tests, suggesting potential to reduce reliance on PET or CSF follow-up.

Quest Diagnostics (NYSE: DGX) reported Q3 2025 net revenues $2.82B (+13.1% vs. 2024) and reported diluted EPS $2.16 (+8.5%).

Adjusted diluted EPS was $2.60 (+13.0%). Year-to-date cash provided by operations was $1.4B (+63.1%).

The company raised full-year 2025 guidance: net revenues $10.96–11.00B, reported diluted EPS $8.58–8.66, adjusted diluted EPS $9.76–9.84, and cash from operations ~$1.8B.

Operational highlights include a lab services joint venture with Corewell Health (Co-Lab Solutions expected to scale to ~$1B annual revenue next year), acquisition of select Fresenius dialysis testing assets, consumer-health collaborations, FDA breakthrough designation for Haystack MRD, and published AD-Detect validation data.

WHOOP has launched WHOOP Advanced Labs, a revolutionary health feature combining blood testing with continuous wearable data monitoring. The service has garnered over 350,000 waitlist signups since May, demonstrating strong market demand.

Members can either upload existing bloodwork or schedule comprehensive testing through Quest Diagnostics (NYSE: DGX), with subscription options ranging from $199 for one test to $599 for four annual tests. The platform provides clinician-reviewed results, AI-powered coaching, and personalized recommendations by connecting biomarker data with 24/7 physiological monitoring.

This launch aligns with WHOOP's mission to add one billion healthy years to people's lives by creating a continuous feedback loop between clinical biomarkers and wearable data, helping members understand and improve their healthspan through actionable insights.

Quest Diagnostics (NYSE: DGX) has scheduled its Q3 2025 financial results release for October 21, 2025, before market opening. The company will host a conference call at 8:30 a.m. Eastern Time to discuss the results.

Participants can join via phone using specific dial-in numbers for U.S./Canada (888-455-0391) and international callers (773-756-0467) with passcode "7895081". A webcast will be available on the company's investor relations website, with replay access until November 5, 2025.