---
schema_version: "secwatch.filing_event.v1"
accession: "0000822818-26-000028"
form_type: "8-K"
ticker: "CLH"
cik: "0000822818"
company_name: "CLEAN HARBORS INC"
filed_at: "2026-05-20T20:41:59+00:00"
generated_at: "2026-05-20T20:45:56.855122+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Clean Harbors shareholders re-elect all Class I directors, approve say-on-pay and auditor

## Summary
- Four Class I directors re-elected with overwhelming support; highest vote for Shelley Stewart Jr. (48.3M for, 316K withheld).
- Advisory vote on named executive officer compensation passed: 45.9M for, 2.6M against, 16K abstain.
- Ratification of Deloitte & Touche as independent auditor for FY2026 approved: 47.8M for, 2.3M against.
- Broker non-votes of 1.5M on director and say-on-pay proposals; none on auditor ratification.

## SEC filing metadata
- accession: 0000822818-26-000028
- form_type: 8-K
- ticker: CLH
- cik: 0000822818
- company_name: CLEAN HARBORS INC
- filed_at: 2026-05-20T20:41:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 5.07, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/822818/000082281826000028/0000822818-26-000028-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/822818/000082281826000028/clh-20260520.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000822818-26-000028
- JSON: https://secwatch.observer/filing/0000822818-26-000028.json
- Plain text: https://secwatch.observer/filing/0000822818-26-000028.txt

## Key facts
- Shareholder Votes
  CLEAN HARBORS INC shareholders approved Election of four Class I directors at the 2026-05-20 meeting.
  - Proposal: director election
  - Outcome: passed
  - Meeting: 2026-05-20
  source text: Election of the four persons named below as Class I members of the Board of Directors of the Company to serve until the 2029 annual meeting of shareholders and until their respective successors are duly elected and qualified:
  evidence_url: https://www.sec.gov/Archives/edgar/data/822818/000082281826000028/0000822818-26-000028-index.htm
- Shareholder Votes
  CLEAN HARBORS INC shareholders approved Approval, on a non-binding, advisory basis, of the compensation of the Company’s named executive officers as described in the 2026 Proxy Statement at the 2026-05-20 meeting.
  - Proposal: say on pay
  - Outcome: passed
  - Meeting: 2026-05-20
  source text: Approval, on a non-binding, advisory basis, of the compensation of the Company’s named executive officers as described in the 2026 Proxy Statement.
  evidence_url: https://www.sec.gov/Archives/edgar/data/822818/000082281826000028/0000822818-26-000028-index.htm
- Shareholder Votes
  CLEAN HARBORS INC shareholders approved Ratification of the selection of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026 at the 2026-05-20 meeting.
  - Proposal: auditor ratification
  - Outcome: passed
  - Meeting: 2026-05-20
  source text: Ratification of the selection of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/822818/000082281826000028/0000822818-26-000028-index.htm

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