---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-185293"
form_type: "8-K"
ticker: "THG"
cik: "0000944695"
company_name: "HANOVER INSURANCE GROUP, INC."
filed_at: "2025-08-21T23:59:59+00:00"
generated_at: "2026-05-17T11:02:41.735561+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Hanover Insurance prices $500M 5.50% senior notes due 2035, to refinance near-term debt

## Summary
- $500M of 5.50% senior notes due Sept 1, 2035 priced on Aug 19, 2025.
- Proceeds to repay 7.625% notes due Oct 2025 and 4.500% notes due Apr 2026.
- Closing expected Aug 21, 2025; joint book-runners: Goldman Sachs, J.P. Morgan, Morgan Stanley.

## SEC filing metadata
- accession: 0001193125-25-185293
- form_type: 8-K
- ticker: THG
- cik: 0000944695
- company_name: HANOVER INSURANCE GROUP, INC.
- filed_at: 2025-08-21T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 2.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/944695/000119312525185293/0001193125-25-185293-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/944695/000119312525185293/d938751d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-185293
- JSON: https://secwatch.observer/filing/0001193125-25-185293.json
- Plain text: https://secwatch.observer/filing/0001193125-25-185293.txt

## Key facts
- Debt Financings
  HANOVER INSURANCE GROUP, INC. incurred senior notes of $500 million at 5.50% maturing September 1, 2035.
  - Instrument: senior notes
  - Principal: $500 million
  - Rate: 5.50%
  - Maturity: September 1, 2035
  - Event: incurrence
  source text: priced a registered offering of $500 million aggregate principal amount of senior, unsecured 5.50% notes due September 1, 2035
  evidence_url: https://www.sec.gov/Archives/edgar/data/944695/000119312525185293/0001193125-25-185293-index.htm

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