---
schema_version: "secwatch.filing_event.v1"
accession: "0000822818-23-000031"
form_type: "8-K"
ticker: "CLH"
cik: "0000822818"
company_name: "CLEAN HARBORS INC"
filed_at: "2023-05-03T23:59:59+00:00"
generated_at: "2026-06-16T02:03:46.215495+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Clean Harbors Q1 revenue up 12% to $1.31B; raises FY23 adjusted EBITDA guidance to $1.02-1.06B

## Summary
- Q1 net income $72.4M ($1.33 EPS) vs $45.3M ($0.83); adjusted EPS $1.36.
- Revenue $1.31B (+12% YoY); Environmental Services rev +13%, Safety-Kleen rev +7%.
- Adjusted EBITDA $215.1M (+19%); margin 16.5% (+110 bps).
- Full-year 2023 adjusted EBITDA guidance raised to $1.02-1.06B reflecting Thompson Industrial acquisition ($9M expected contribution).
- Q2 2023 adjusted EBITDA expected down 7-9% YoY; SKSS profitability pressured by base oil spread compression.

## SEC filing metadata
- accession: 0000822818-23-000031
- form_type: 8-K
- ticker: CLH
- cik: 0000822818
- company_name: CLEAN HARBORS INC
- filed_at: 2023-05-03T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/822818/000082281823000031/0000822818-23-000031-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/822818/000082281823000031/clh-20230503.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000822818-23-000031
- JSON: https://secwatch.observer/filing/0000822818-23-000031.json
- Plain text: https://secwatch.observer/filing/0000822818-23-000031.txt

## Key facts
- Earnings Releases
  CLEAN HARBORS INC reported first quarter ended March 31, 2023 results: revenue $1.31 billion, net income $72.4 million, EPS $1.33 per diluted share. Guidance raised.
  - Period: first quarter ended March 31, 2023
  - Revenue: $1.31 billion
  - Net income: $72.4 million
  - EPS: $1.33 per diluted share
  - Guidance: raised
  - Result: reported results
  source text: • Achieves Q1 Revenue Growth of 12% to $1.31 Billion on Strength of ES Segment • Generates Q1 Net Income of $72.4 Million, or EPS of $1.33, with Adjusted EPS of $1.36 • Delivers Q1 Adjusted EBITDA Growth of 19% to $215.1 Million • Raises Full-Year 2023 Adjusted EBITDA Guidance to Reflect Acquisition of Thompson Industrial Services NORWELL, Mass. – May 3, 2023 – Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH), the leading provider of environmental and industrial services throughout North America, today announced financial results for the first quarter ended March 31, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/822818/000082281823000031/0000822818-23-000031-index.htm

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