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 (+33.0% vs +25.2%).
Side by side
| DGX | LH | |
|---|---|---|
| Market cap | $25.4B | $25.3B |
| Price | $230.97 | $312.15 |
| Today | +0.1% | −0.7% |
| Return YTD | +33.0% | +25.2% |
| Return 1Y | +27.6% | +13.2% |
| Since June 26, 2026 | +10.0% | +15.0% |
| P/E | 23.9 | 25.3 |
| P/S | 2.2 | 1.8 |
| P/B | 3.4 | 2.9 |
Data as of 2026-10-09 · updates daily after U.S. close
Since June 26, 2026: the change in the closing price, from the daily closes Sectivia records itself since that date.
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.