---
schema_version: "secwatch.filing_event.v1"
accession: "0000822818-26-000024"
form_type: "8-K"
ticker: "CLH"
cik: "0000822818"
company_name: "CLEAN HARBORS INC"
filed_at: "2026-05-14T14:55:52+00:00"
generated_at: "2026-05-14T14:57:08.347146+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Clean Harbors acquires Terra Nova Solutions for $225M all-cash

## Summary
- $225M all-cash acquisition of Terra Nova, a regional hazardous waste provider with 5 sites in the Carolinas.
- Terra Nova expected to generate $45-50M annual revenue and ~$15M Adjusted EBITDA.
- Clean Harbors anticipates ~$4M annual synergies, implying a post-synergy multiple of 11.8x.
- Acquisition adds 150 specialized trucks/tankers and 100+ employees; enhances Technical Services and Field Services.

## SEC filing metadata
- accession: 0000822818-26-000024
- form_type: 8-K
- ticker: CLH
- cik: 0000822818
- company_name: CLEAN HARBORS INC
- filed_at: 2026-05-14T14:55:52+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/822818/000082281826000024/0000822818-26-000024-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/822818/000082281826000024/clh-20260514.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000822818-26-000024
- JSON: https://secwatch.observer/filing/0000822818-26-000024.json
- Plain text: https://secwatch.observer/filing/0000822818-26-000024.txt

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