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Labcorp Holdings vs Quest Diagnostics: LH and DGX compared
Labcorp Holdings is the larger company: $3.8B of revenue in its latest quarter (Q3 2026) against $3.1B for Quest Diagnostics (Q3 2026). Quest Diagnostics is growing faster (+10% against +7% a year earlier). Quest Diagnostics is more profitable, with an operating margin of 15.5% against 10.6%.
Where the money goes: LH and DGX
Labcorp Holdings (LH) · Q3 2026
Labcorp Holdings, Q3 2026: revenue $3.8B (+7% year over year), operating margin 10.6%, net earnings $263M, operating cash flow $564M. The chart follows the revenue to costs, profit and cash.
Quest Diagnostics (DGX) · Q3 2026
Quest Diagnostics, Q3 2026: revenue $3.1B (+10% year over year), operating margin 15.5%, net earnings $312M, operating cash flow $611M. The chart follows the revenue to costs, profit and cash.
| Labcorp Holdings (LH) | Quest Diagnostics (DGX) | |
|---|---|---|
| Latest quarter | Q3 2026 | Q3 2026 |
| Revenue | $3.8B | $3.1B |
| Revenue growth, Y/Y | +7% | +10% |
| Gross margin | 29.1% | — |
| Operating margin | 10.6% | 15.5% |
| Net earnings | $263M | $312M |
| Net margin | 6.9% | 10.1% |
| Operating cash flow | $564M | $611M |
| Free cash flow | $412M | $445M |
| Market value | $29.6B | $28.7B |
| P/E | 29.8× | 25.5× |
| Analysts’ mean target | $387.25 | $257.27 |
Where the revenue comes from
Quest Diagnostics
- DIS business: $3.0B (98%)
- All other operating segments: $62.0M (2%)
Questions
Which is bigger, Labcorp Holdings or Quest Diagnostics?
Labcorp Holdings is the larger company: $3.8B of revenue in its latest quarter (Q3 2026) against $3.1B for Quest Diagnostics (Q3 2026).
Is Labcorp Holdings or Quest Diagnostics growing faster?
Quest Diagnostics is growing faster (+10% against +7% a year earlier).
Which is more profitable, Labcorp Holdings or Quest Diagnostics?
Quest Diagnostics is more profitable, with an operating margin of 15.5% against 10.6%.
More: Labcorp Holdings earnings · how Labcorp Holdings makes money · Quest Diagnostics earnings · how Quest Diagnostics makes money
From the companies' latest 10-Q, 10-K or earnings release (10-Q filed Oct 30, 2026; 10-Q filed Oct 23, 2026). Fiscal quarters can end on different dates. Not investment advice.