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 1.9× larger than Quest Diagnostics by market cap; Quest Diagnostics trades at the lower P/E (22.6 vs 40.7); year to date, Quest Diagnostics leads (+19.5% vs −16.7%).
Side by side
| DGX | IDXX | |
|---|---|---|
| Market cap | $23.1B | $44.5B |
| Price | $207.44 | $563.57 |
| Today | −0.3% | +0.9% |
| Return YTD | +19.5% | −16.7% |
| Return 1Y | +21.0% | +4.2% |
| P/E | 22.6 | 40.7 |
| P/S | 2.1 | 10.0 |
| P/B | 3.1 | 28.6 |
Data as of 2026-07-11 · updates daily after U.S. close
The two companies
Quest DiagnosticsDGX
Nationwide clinical laboratory network for routine and advanced diagnostics.
Full DGX profile →IDEXX LaboratoriesIDXX
Diagnostics and software for veterinarians; market leader in veterinary diagnostics.
Full IDXX profile →More comparisons in Diagnostics
See where DGX and IDXX sit in the full Medicine, pharma & life science map — every segment from suppliers to end markets.Open the Life science value chain →