---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-147049"
form_type: "8-K"
ticker: "MRK"
cik: "0000310158"
company_name: "Merck & Co., Inc."
filed_at: "2023-05-17T23:59:59+00:00"
generated_at: "2026-06-14T22:43:01.465994+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Merck closes $6B multi-tranche debt offering across six maturities from 2028 to 2063

## Summary
- $500M 4.050% Notes due 2028, $750M 4.300% Notes due 2030, $1.5B 4.500% Notes due 2033, $750M 4.900% Notes due 2044, $1.5B 5.000% Notes due 2053, $1B 5.150% Notes due 2063.
- Total aggregate principal amount of $6.0B issued in underwritten public offering.
- Offering closed on May 17, 2023.
- Notes issued under indenture with U.S. Bank Trust; legal opinion and officers' certificates filed as exhibits.

## SEC filing metadata
- accession: 0001193125-23-147049
- form_type: 8-K
- ticker: MRK
- cik: 0000310158
- company_name: Merck & Co., Inc.
- filed_at: 2023-05-17T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/310158/000119312523147049/0001193125-23-147049-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/310158/000119312523147049/d436124d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-147049
- JSON: https://secwatch.observer/filing/0001193125-23-147049.json
- Plain text: https://secwatch.observer/filing/0001193125-23-147049.txt

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