Quest Diagnosticsvs.IDEXX Laboratories
DGX vs IDXX · both in Diagnostics, part of the Medicine, pharma & life science value chain: Tests, imaging and assays that support clinical decision-making.
IDEXX Laboratories is about 1.7× larger than Quest Diagnostics by market cap; Quest Diagnostics trades at the lower P/E (24.6 vs 39.0); year to date, Quest Diagnostics leads (+40.5% vs −17.3%).
Side by side
| DGX | IDXX | |
|---|---|---|
| Market cap | $26.1B | $44.4B |
| Price | $244.51 | $550.01 |
| Today | +0.3% | −1.7% |
| Return YTD | +40.5% | −17.3% |
| Return 1Y | +35.3% | −13.3% |
| P/E | 24.6 | 39.0 |
| P/S | 2.3 | 9.8 |
| P/B | 3.5 | 27.6 |
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 →IDEXX LaboratoriesIDXX
Vets are the customers. IDEXX sells the analysers that sit in the clinic, runs the reference laboratories that handle samples sent out, and writes the software the practice runs on.
Full IDXX profile →More DGX & IDXX comparisons
Other head-to-heads in the Diagnostics segment.