---
schema_version: "secwatch.filing_event.v1"
accession: "0000822818-24-000037"
form_type: "8-K"
ticker: "CLH"
cik: "0000822818"
company_name: "CLEAN HARBORS INC"
filed_at: "2024-09-03T23:59:59+00:00"
generated_at: "2026-05-31T06:43:14.997531+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Clean Harbors elects co-CEOs Battles and Gerstenberg to Board, expands to 13 members

## Summary
- Board expanded from 11 to 13 directors effective August 29, 2024.
- Co-CEOs Michael Battles and Eric Gerstenberg elected as Class III directors.
- Battles served as CFO since 2016; Gerstenberg as COO since 2015 before co-CEO roles.
- Neither will receive additional compensation for board service; no related party transactions.
- Terms expire at 2025 annual meeting; no committee appointments.

## SEC filing metadata
- accession: 0000822818-24-000037
- form_type: 8-K
- ticker: CLH
- cik: 0000822818
- company_name: CLEAN HARBORS INC
- filed_at: 2024-09-03T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/822818/000082281824000037/0000822818-24-000037-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/822818/000082281824000037/clh-20240829.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000822818-24-000037
- JSON: https://secwatch.observer/filing/0000822818-24-000037.json
- Plain text: https://secwatch.observer/filing/0000822818-24-000037.txt

## Key facts
- Executive change
  Michael Battles was elected as Director at CLEAN HARBORS INC.
  - Action: elected
  - Role: Director
  source text: On September 3, 2024, Clean Harbors, Inc. (the “Company”) announced the expansion of the Company’s Board of Directors (the "Board") from eleven to thirteen members and the election of Co-Chief Executive Officers Michael Battles and Eric Gerstenberg to the Board, all effective immediately following the Company's board meeting on August 29, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/822818/000082281824000037/0000822818-24-000037-index.htm
- Executive change
  Eric Gerstenberg was elected as Director at CLEAN HARBORS INC.
  - Action: elected
  - Role: Director
  source text: On September 3, 2024, Clean Harbors, Inc. (the “Company”) announced the expansion of the Company’s Board of Directors (the "Board") from eleven to thirteen members and the election of Co-Chief Executive Officers Michael Battles and Eric Gerstenberg to the Board, all effective immediately following the Company's board meeting on August 29, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/822818/000082281824000037/0000822818-24-000037-index.htm

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