Quest Diagnostics Inc (DGX)
A forensic read on Quest Diagnostics Inc built from its complete SEC filings — financial-health screens, earnings quality, red flags and a price-aware rating. Reproducible math, not opinion.
This free snapshot doesn't read filing or proxy text, so the auditor-quality and governance checks that can lower a grade were not evaluated (red flags, auditor quality, say on pay, board independence). Those checks only ever lower a grade, so the full analysis can land below the grade above but never above it — treat it as the most favourable reading, not the settled one.
Quest Diagnostics Inc earns a B (Sound & dependable) forensic quality grade, and its balance-sheet distress test reads 5.7, placing it in the Safe zone. 1 forensic signal was flagged in its latest SEC filings, led by return on invested capital.
What the filings flag
Key fundamentals
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Data from SEC EDGAR public filings · metrics as of Aug 8, 2026. Forensic signals flag probability, not certainty.