Quest Diagnosticsvs.Labcorp
DGX vs LH · both in Diagnostics, part of the Medicine, pharma & life science value chain: Tests, imaging and assays that support clinical decision-making.
Quest Diagnostics and Labcorp are similar in size by market cap; year to date, Quest Diagnostics leads (+40.5% vs +35.3%).
Side by side
| DGX | LH | |
|---|---|---|
| Market cap | $26.1B | $26.2B |
| Price | $244.51 | $337.68 |
| Today | +0.3% | −0.5% |
| Return YTD | +40.5% | +35.3% |
| Return 1Y | +35.3% | +22.0% |
| P/E | 24.6 | 26.1 |
| P/S | 2.3 | 1.8 |
| P/B | 3.5 | 3.0 |
Data as of 2026-08-26 · updates daily after U.S. close
The two companies
Quest DiagnosticsDGX
A nationwide lab network that does routine testing at volume, with more advanced diagnostics and health data work on top.
Full DGX profile →LabcorpLH
Samples from across the US end up in Labcorp's laboratories, which handle routine clinical testing alongside genomics and specialty assays. A contract research arm works for drug developers.
Full LH profile →More DGX & LH comparisons
Other head-to-heads in the Diagnostics segment.
See where DGX and LH sit in the full Medicine, pharma & life science map: every segment from suppliers to end markets.Open the Life science value chain →