---
schema_version: "secwatch.filing_event.v1"
accession: "0000822818-26-000017"
form_type: "8-K"
ticker: "CLH"
cik: "0000822818"
company_name: "CLEAN HARBORS INC"
filed_at: "2026-05-06T23:59:59+00:00"
generated_at: "2026-05-14T23:03:57.305613+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Clean Harbors Q1 revenue record $1.46B; raises FY2026 EBITDA and FCF guidance

## Summary
- Net income $63.2M ($1.19 diluted EPS) vs $58.7M ($1.09) in Q1 2025; revenue up 2% to $1.46B.
- Adjusted EBITDA rose 6% to $247.9M; margin expanded 60 bps to 17.0%; ES segment margin improved for 16th straight quarter.
- SKSS segment Adjusted EBITDA up 17% YoY; waste oil collected 53M gallons; CFO pricing strategy advanced.
- FY2026 Adjusted EBITDA guidance raised to $1.24-1.30B (midpoint $1.27B); adjusted FCF raised to $490-550M (midpoint $520M).
- Q2 2026 Adjusted EBITDA expected to grow 5-9% YoY; company cites strong demand and PFAS/project services opportunities.

## SEC filing metadata
- accession: 0000822818-26-000017
- form_type: 8-K
- ticker: CLH
- cik: 0000822818
- company_name: CLEAN HARBORS INC
- filed_at: 2026-05-06T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/822818/000082281826000017/0000822818-26-000017-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/822818/000082281826000017/clh-20260506.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000822818-26-000017
- JSON: https://secwatch.observer/filing/0000822818-26-000017.json
- Plain text: https://secwatch.observer/filing/0000822818-26-000017.txt

## Key facts
- Earnings Releases
  CLEAN HARBORS INC reported first quarter ended March 31, 2026 results: revenue $1.46 billion, net income $63.2 million, EPS $1.19 per diluted share. Guidance raised.
  - Period: first quarter ended March 31, 2026
  - Revenue: $1.46 billion
  - Net income: $63.2 million
  - EPS: $1.19 per diluted share
  - Guidance: raised
  - Result: reported results
  source text: Clean Harbors Announces First-Quarter 2026 Financial Results • Delivers Highest Q1 Revenue in Company’s History at $1.46 Billion • Generates Q1 Net Income of $63.2 Million, or EPS of $1.19
  evidence_url: https://www.sec.gov/Archives/edgar/data/822818/000082281826000017/0000822818-26-000017-index.htm

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