---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-050654"
form_type: "8-K"
ticker: "MRK"
cik: "0000310158"
company_name: "Merck & Co., Inc."
filed_at: "2023-04-27T23:59:59+00:00"
generated_at: "2026-06-16T09:38:29.977231+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Merck Q1 revenue $14.5B (-9%), GAAP EPS $1.11; raises FY non-GAAP EPS guidance to $6.88-$7.00

## Summary
- Q1 revenue $14.5B, down 9% YoY; excluding LAGEVRIO and FX, up 15%.
- GAAP EPS $1.11, Non-GAAP EPS $1.40; both down 35% YoY.
- KEYTRUDA sales $5.8B (+20%), GARDASIL sales $2.0B (+35% YoY).
- LAGEVRIO sales fell 88% to $392M; proposed Prometheus acquisition for $10.8B expected Q3 2023.
- FY2023 outlook raised: sales $57.7-$58.9B, Non-GAAP EPS $6.88-$7.00; GAAP EPS lowered to $5.85-$5.97 on Zetia settlement.

## SEC filing metadata
- accession: 0001104659-23-050654
- form_type: 8-K
- ticker: MRK
- cik: 0000310158
- company_name: Merck & Co., Inc.
- filed_at: 2023-04-27T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/310158/000110465923050654/0001104659-23-050654-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/310158/000110465923050654/tm2313695d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-050654
- JSON: https://secwatch.observer/filing/0001104659-23-050654.json
- Plain text: https://secwatch.observer/filing/0001104659-23-050654.txt

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