---
schema_version: "secwatch.filing_event.v1"
accession: "0000822818-21-000037"
form_type: "8-K"
ticker: "CLH"
cik: "0000822818"
company_name: "CLEAN HARBORS INC"
filed_at: "2021-08-04T23:59:59+00:00"
generated_at: "2026-06-29T22:54:36.425583+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Clean Harbors Q2 adj EBITDA $187.8M (+36%); raises FY21 outlook; plans $1.25B buy

## Summary
- Q2 revenue $926.5M (+30% YoY); net income $67.1M ($1.22 EPS); adj EPS $1.19.
- Adj EBITDA $187.8M (+36% YoY), margin 20.3%; adj free cash flow $114.6M.
- Raises FY21 adj EBITDA guidance to $620-650M; adj FCF guidance to $285-315M.
- Plans $1.25B HydroChemPSC acquisition and $140M Vertex Energy asset acquisition; close expected Q3 2021.
- New $180M incinerator at Kimball, NE to double capacity; operational late 2024/early 2025.

## SEC filing metadata
- accession: 0000822818-21-000037
- form_type: 8-K
- ticker: CLH
- cik: 0000822818
- company_name: CLEAN HARBORS INC
- filed_at: 2021-08-04T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/822818/000082281821000037/0000822818-21-000037-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/822818/000082281821000037/clh-20210804.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000822818-21-000037
- JSON: https://secwatch.observer/filing/0000822818-21-000037.json
- Plain text: https://secwatch.observer/filing/0000822818-21-000037.txt

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