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AI brief of an SEC Form 8-K · Clean Harbors (CLH)

Clean Harbors founder Alan McKim to retire as executive chairman and CTO

Neutral Impact 4 of 5 leadership Written later

Clean Harbors said founder Alan McKim, its Executive Chairman and Chief Technology Officer, notified the Board on May 19, 2026 that he will retire from the Board and his CTO role once the Board appoints a new Chair. The company expects an independent Chair to be appointed in the summer of 2026 as part of a planned leadership transition, and the filing says the retirement does not reflect any disagreement with the company.

Key points

  • McKim notified the Board on May 19, 2026, and the company announced the retirement in a press release dated May 20, 2026.
  • The retirement takes effect when the Board appoints a new Chair, which is expected in summer 2026.
  • The filing states the retirement does not arise from any disagreement with the company on operations, policies or practices.
  • Edward Galante, lead independent director, and co-CEOs Mike Battles and Eric Gerstenberg were quoted in the press release.

The filing

CompanyClean Harbors (CLH)
Form8-K, current report
Filed with the SECMay 20, 2026, 4:34 PM ET
Accession number0000822818-26-000027

Items reported: 5.02 Director / Officer Change7.01 Regulation FD Disclosure

Read the filing on SEC.gov ↗

Written by AI (Anthropic Claude, claude-haiku-5-5) on Nov 8, 2026, 1:11 AM ET, from the text of the filing and its press-release exhibits only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on May 20, 2026.

Briefs are written by AI from the filing text (each brief's own page names the model) and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the model's reading of the filing for shareholders, not a price forecast. Not investment advice.