---
schema_version: "secwatch.filing_event.v1"
accession: "0000822818-22-000037"
form_type: "8-K"
ticker: "CLH"
cik: "0000822818"
company_name: "CLEAN HARBORS INC"
filed_at: "2022-09-06T23:59:59+00:00"
generated_at: "2026-06-23T16:00:54.844419+00:00"
event_type: "leadership"
sentiment: "positive"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Clean Harbors appoints Alison Quirk and Shelley Stewart Jr. to board; expands to 12 members

## Summary
- Alison Quirk, former EVP Chief HR and Citizenship Officer at State Street, appointed effective Aug 31, 2022.
- Shelley Stewart Jr., former Chief Procurement Officer at DuPont and Tyco International, appointed to board.
- Board expanded from 10 to 12 members; both appointees are Class I directors with term ending at 2023 annual meeting.
- Quirk will serve on Compensation Committee; Stewart on Environmental, Health and Safety Committee.
- Both appointees are independent with no reportable related party transactions in the past three years.

## SEC filing metadata
- accession: 0000822818-22-000037
- form_type: 8-K
- ticker: CLH
- cik: 0000822818
- company_name: CLEAN HARBORS INC
- filed_at: 2022-09-06T23:59:59+00:00
- event_type: leadership
- sentiment: positive
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/822818/000082281822000037/0000822818-22-000037-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/822818/000082281822000037/clh-20220831.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000822818-22-000037
- JSON: https://secwatch.observer/filing/0000822818-22-000037.json
- Plain text: https://secwatch.observer/filing/0000822818-22-000037.txt

## Key facts
- Executive change
  Alison Quirk was appointed as Director at CLEAN HARBORS INC.
  - Action: appointed
  - Role: Director
  source text: On September 6, 2022, Clean Harbors, Inc. (the “Company”) announced the expansion of the Company’s Board of Directors (the "Board") from ten to twelve members and the appointments of Alison Quirk and Shelley Stewart Jr. to the Board, all effective as of August 31, 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/822818/000082281822000037/0000822818-22-000037-index.htm
- Executive change
  Shelley Stewart Jr. was appointed as Director at CLEAN HARBORS INC.
  - Action: appointed
  - Role: Director
  source text: On September 6, 2022, Clean Harbors, Inc. (the “Company”) announced the expansion of the Company’s Board of Directors (the "Board") from ten to twelve members and the appointments of Alison Quirk and Shelley Stewart Jr. to the Board, all effective as of August 31, 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/822818/000082281822000037/0000822818-22-000037-index.htm

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