TotalMarketCap

Quest Diagnostics

DGXNYSE United StatesHealth CareMedical Specialities

Market cap

$27.967 B

$254.20 -0.58%

Close of 6 Nov 2026

As of 6 Nov 2026, Quest Diagnostics (DGX) has a market capitalization of $28.0B. Market cap measures the value of outstanding equity at market prices; company totals combine applicable share classes. Prices and market caps come from Nasdaq, with financial fundamentals from SEC filings. See sources and calculation details.

Revenue

$11.0B

#391 by revenue

Earnings

$992.0M

#394 by earnings

Shares outstanding

110,019,073

Latest filing cover page

P/E ratio

28.2

Cap ÷ net income

Medical Specialities, ranked by market cap

All 44 →
  1. #7IlluminaILMN$31.4B
  2. #8LabcorpLH$29.4B
  3. #9Quest DiagnosticsDGX$28.0B
  4. #10Guardant HealthGH$20.5B
  5. #11Molina HealthcareMOH$11.3B

What if Quest Diagnostics were worth as much as…

Open the what-if tool →

Gold $28.2T

$256,654.35

Per share 1,010× higher

Bitcoin $1.53T

$13,887.12

Per share 54.6× higher

Apple $5.02T

$45,590.12

Per share 179× higher

Or at a round number

$50.0B$100.0B$200.0B$500.0B

Where these numbers come from

Share counts and financials for Quest Diagnostics are taken from its own SEC filings via EDGAR: public record, not an estimate. Market cap is shares outstanding multiplied by the latest close. Read the methodology.