---
schema_version: "secwatch.filing_event.v1"
accession: "0000822818-23-000002"
form_type: "8-K"
ticker: "CLH"
cik: "0000822818"
company_name: "CLEAN HARBORS INC"
filed_at: "2023-01-17T23:59:59+00:00"
generated_at: "2026-06-20T15:04:12.439575+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Clean Harbors launches $500M senior notes offering to refinance 2024 term loans

## Summary
- $500M of unsecured senior notes due 2031 in private offering.
- Proceeds plus $114M revolver draw and cash to repay $614M of 2024 term loans.
- Notes offered to QIBs under Rule 144A and offshore under Regulation S.
- Refinancing extends maturity and replaces secured debt with unsecured notes.

## SEC filing metadata
- accession: 0000822818-23-000002
- form_type: 8-K
- ticker: CLH
- cik: 0000822818
- company_name: CLEAN HARBORS INC
- filed_at: 2023-01-17T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/822818/000082281823000002/0000822818-23-000002-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/822818/000082281823000002/clh-20230117.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000822818-23-000002
- JSON: https://secwatch.observer/filing/0000822818-23-000002.json
- Plain text: https://secwatch.observer/filing/0000822818-23-000002.txt

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