---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-052081"
form_type: "8-K"
ticker: "MRK"
cik: "0000310158"
company_name: "Merck & Co., Inc."
filed_at: "2026-04-30T23:59:59+00:00"
generated_at: "2026-05-15T01:15:00.476351+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Merck reports Q1 GAAP loss per share of $1.72 on $16.3B sales; narrows and raises full-year guidance

## Summary
- GAAP EPS loss of $1.72; Non-GAAP EPS loss of $1.28, both include $3.62/share charge for Cidara acquisition.
- Total sales $16.3B, +5% YoY; KEYTRUDA sales $8.0B (+12%), WINREVAIR $525M (+88%).
- Full-year 2026 sales guidance raised to $65.8B-$67.0B; Non-GAAP EPS guidance raised to $5.04-$5.16.
- Announced agreement to acquire Terns Pharmaceuticals; one-time charge ~$5.8B (~$2.35/share) not in guidance.
- Animal Health sales $1.8B (+13%); multiple regulatory approvals including IDVYNSO for HIV.

## SEC filing metadata
- accession: 0001104659-26-052081
- form_type: 8-K
- ticker: MRK
- cik: 0000310158
- company_name: Merck & Co., Inc.
- filed_at: 2026-04-30T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/310158/000110465926052081/0001104659-26-052081-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/310158/000110465926052081/tm2612241d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-052081
- JSON: https://secwatch.observer/filing/0001104659-26-052081.json
- Plain text: https://secwatch.observer/filing/0001104659-26-052081.txt

## Key facts
- Earnings Releases
  Merck & Co., Inc. reported first quarter of 2026 results: revenue $16,286, net income (4,240), EPS (1.72). Guidance raised.
  - Period: first quarter of 2026
  - Revenue: $16,286
  - Net income: (4,240)
  - EPS: (1.72)
  - Guidance: raised
  - Result: reported results
  source text: First Quarter $ in millions, except EPS amounts 2026 2025 Change Change Ex- Exchange Sales $ 16,286 $ 15,529 5 % 3 % GAAP net (loss) income 2 (4,240 ) 5,079 N/M N/M Non-GAAP net (loss) income that excludes certain items 2,3* (3,156 ) 5,611 N/M N/M GAAP EPS (1.72 ) 2.01 N/M N/M
  evidence_url: https://www.sec.gov/Archives/edgar/data/310158/000110465926052081/0001104659-26-052081-index.htm

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