---
schema_version: "secwatch.filing_event.v1"
accession: "0001022079-23-000091"
form_type: "8-K"
ticker: "DGX"
cik: "0001022079"
company_name: "QUEST DIAGNOSTICS INC"
filed_at: "2023-04-27T23:59:59+00:00"
generated_at: "2026-06-16T07:43:57.226263+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Quest Diagnostics Q1 revenue falls 10.7% to $2.33B; acquires Haystack Oncology for $300M

## Summary
- Q1 net revenue $2.33B, down 10.7% YoY; base business revenue up 10% to $2.21B.
- Reported diluted EPS $1.78 (down 39%); adjusted diluted EPS $2.04 (down 36.6%).
- Full-year 2023 guidance: revenue $8.93B-$9.08B, adjusted EPS $8.45-$8.95.
- Acquires Haystack Oncology for $300M cash at close plus up to $150M milestones; MRD liquid biopsy tech.
- Deal expected to close Q2 2023; modest dilution for 3 years, accretive by 2026.

## SEC filing metadata
- accession: 0001022079-23-000091
- form_type: 8-K
- ticker: DGX
- cik: 0001022079
- company_name: QUEST DIAGNOSTICS INC
- filed_at: 2023-04-27T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1022079/000102207923000091/0001022079-23-000091-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1022079/000102207923000091/dgx-20230427.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001022079-23-000091
- JSON: https://secwatch.observer/filing/0001022079-23-000091.json
- Plain text: https://secwatch.observer/filing/0001022079-23-000091.txt

## Key facts
- Earnings Releases
  QUEST DIAGNOSTICS INC updated its the quarter ended March 31, 2023 guidance (reaffirmed).
  - Period: the quarter ended March 31, 2023
  - Guidance: reaffirmed
  - Result: reported results
  source text: On April 27, 2023, Quest Diagnostics Incorporated (the "Company") issued a press release announcing, among other things, its results for the quarter ended March 31, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1022079/000102207923000091/0001022079-23-000091-index.htm
- Earnings Releases
  QUEST DIAGNOSTICS INC reported Full Year 2023 results: revenue $8.93 billion $9.08 billion, EPS $7.52 $8.02. Guidance lowered.
  - Period: Full Year 2023
  - Revenue: $8.93 billion $9.08 billion
  - EPS: $7.52 $8.02
  - Guidance: lowered
  - Result: guidance update
  source text: Full year 2023 revenues now expected to be between $8.93 billion and $9.08 billion; reported diluted EPS now expected to be between $7.52 and $8.02
  evidence_url: https://www.sec.gov/Archives/edgar/data/1022079/000102207923000091/0001022079-23-000091-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.