---
schema_version: "secwatch.filing_event.v1"
accession: "0000822818-26-000042"
form_type: "8-K"
ticker: "CLH"
cik: "0000822818"
company_name: "CLEAN HARBORS INC"
filed_at: "2026-10-05T21:06:49+00:00"
generated_at: "2026-10-12T16:41:11.923605+00:00"
event_type: "debt"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Clean Harbors issues $600M 6.250% senior notes due 2034 to fund $775M EnviroServe, ES&H deals

## Summary
- $600M of 6.250% senior notes due September 30, 2034; semi-annual interest on March 31 and September 30, first payment March 31, 2027.
- Proceeds: $470M funds the EnviroServe acquisition (closed October 2, 2026); the remainder repays revolver borrowings used for ES&H (closed September 18, 2026).
- Combined purchase price of $775M for EnviroServe and ES&H, which are expected to add ~$340M of annual revenue and ~$87M of post-synergy Adjusted EBITDA (8.9x multiple).
- EnviroServe: Sandy, Utah-based, serves nearly 2,500 customers via 40 locations, permits in 48 states and 18 10-day transfer facilities.
- ES&H: Louisiana-based with 13 coastal service branches and the U.S. Coast Guard's highest Oil Spill Response Organization classification.

## SEC filing metadata
- accession: 0000822818-26-000042
- form_type: 8-K
- ticker: CLH
- cik: 0000822818
- company_name: CLEAN HARBORS INC
- filed_at: 2026-10-05T21:06:49+00:00
- event_type: debt
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 2.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/822818/000082281826000042/0000822818-26-000042-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/822818/000082281826000042/clh-20261001.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000822818-26-000042
- JSON: https://secwatch.observer/filing/0000822818-26-000042.json
- Plain text: https://secwatch.observer/filing/0000822818-26-000042.txt

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