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NYSE · DGXHealthcareMedical Labs

Quest Diagnostics Inc. (DGX)

$255.68+3.49%
Close Nov 4, 2026 · split-adjusted
Nov 4, 2026$255.68▲ 43.62% in range
Nov 4, 2025Low $173.49 · High $255.68Nov 4, 2026
What changed · written from our data
As of Nov 4, 2026

Quest Diagnostics closed at $255.68 on Nov 4, up 3.49% — matching its 52-week closing high. Volume of 916.1K shares was 0.91× its 20-day average (close to normal).

Split-adjusted performance: +11.9% over one month, +35.2% over six months, +43.0% over one year.

In the quarter ended Sep 30, 2026, revenue was $3.10B, up 10.0% from a year earlier, with a net margin of 10.0%.

Short interest was 3.6M shares at the Oct 15 settlement, up 4.6% from the prior report (3.2% of float, 3.4 days to cover).

Market cap$28.22B110.4M shares
Revenue · quarter$3.10B+10.0% YoY
Diluted EPS$2.78+28.7% YoY
P/E · TTM25.1×P/S 2.4×
Net margin10.0%Gross 33.6%
Dividend yield1.35%$0.86 last paid
52-week range173.49 – 255.680.0% from high
Volume916.1K0.91× 20-day avg
Volatility · 60d22.1%Annualised
Short % of float3.2%3.4 days to cover
Net cash-$4.75BCash $797.0M
Next earnings—Not scheduled
Split-adjusted performance
1W +4.1%1M +11.9%3M +7.2%6M +35.2%YTD +47.3%1Y +43.0%3Y +97.6%5Y +77.6%

Earnings reactions

History →

No reported quarters with price history yet.

Rank within Medical Labs

Percentile among 24 companies (100 = best)

6-month momentum46
Revenue growth22
Net margin86
Value (low P/E)—
Size91

Industry medians: 6-month return +36.9%, revenue growth +25.0%, net margin −4.0%, P/E 32.4×.

Short interest

Details →
Shares short3.6M+4.6% vs prior
Days to cover3.4Settled Oct 15
% of float3.2%
Short vol. 10d71.4%of daily volume

Closest peers by size in Medical Labs

CompanyPriceToday6MRev. growthNet marginP/EMkt cap
DGXQuest Diagnostics$255.68+3.49%+35.2%+10.0%10.0%25.1$28.22B
LHLabcorp Holdings$367.79+3.92%+43.1%+6.9%6.9%29.7$29.86BCompare
GHGuardant Health$168.58−3.67%+82.7%+44.3%−35.9%—$22.62BCompare
NTRANatera$391.03+0.62%+81.8%+37.7%−8.9%—$56.36BCompare
CAICaris Life Sciences$33.22+1.13%+73.7%+45.4%−0.2%89.3$9.39BCompare
GRALGRAIL$143.66+3.03%+128.9%+25.7%−246.7%—$6.42BCompare
RDNTRadNet$80.26+9.67%+36.9%+25.0%1.2%—$6.32BCompare
BLLNBillionToOne$113.89+3.11%+39.9%—7.4%—$5.37BCompare
CDNACareDx$85.86−2.95%+309.8%+39.3%13.8%35.1$4.51BCompare

News about Quest Diagnostics

All news →
Why Quest Diagnostics (DGX) is a Top Momentum Stock for the Long-TermZacks Investment Research · Oct 23, 2026▲ PositiveDGX Q3 Earnings & Revenues Beat, '26 View Raised, Stock Down in Pre-MarketZacks Investment Research · Oct 22, 2026▲ PositiveQuest Diagnostics (DGX) Q3 Earnings and Revenues Beat EstimatesZacks Investment Research · Oct 22, 2026▲ PositiveIs This the Right Time to Add DGX Stock to Your Portfolio?Zacks Investment Research · Sep 22, 2026▲ PositiveQuest Diagnostics Incorporated (DGX) Hits Fresh High: Is There Still Room to Run?Zacks Investment Research · Sep 16, 2026▲ Positive

Quick answers

What does Quest Diagnostics do?
Quest Diagnostics is a leading independent provider of diagnostic testing, information, and services in the US. The company generates over 97% of its revenue through clinical testing, anatomic pathology, esoteric testing, and substance abuse testing with specimens collected at its national network of roughly 2,400 patient service centers, as well as multiple doctors offices and hospitals.
What is DGX's market cap?
$28.22B, based on the Nov 4 close of $255.68.
What is DGX's P/E ratio?
25.1× trailing-twelve-month earnings of $1.12B.
Does Quest Diagnostics pay a dividend?
Yes. The latest regular dividend was $0.86 per share (ex-date Oct 6), an annualised yield of 1.35%.
How much of DGX is sold short?
3.6M shares, 3.2% of float, as of Oct 15, 2026.
What sector is DGX in?
Healthcare, in the Medical Labs industry.

About Quest Diagnostics

Quest Diagnostics is a leading independent provider of diagnostic testing, information, and services in the US. The company generates over 97% of its revenue through clinical testing, anatomic pathology, esoteric testing, and substance abuse testing with specimens collected at its national network of roughly 2,400 patient service centers, as well as multiple doctors offices and hospitals. The firm also runs a much smaller diagnostic solutions segment that provides clinical trials testing, risk-assessment services, and information technology solutions.

HQ: Secaucus, NJ57,000 employeesListed Dec 17, 1996questdiagnostics.com

Sources: Massive / Polygon daily aggregates (split-adjusted) · SEC filings via Massive · FINRA settlements via Massive · Financial Modeling Prep. Figures are dated where shown; research is informational, not investment advice. Methodology