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CLEAN HARBORS INC — Investor Relations & Filings

Ticker · CLH ISIN · US1844961078 LEI · 5493000SJVZVZJKHJF48 US Water supply; sewerage, waste management and remediation activities
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Filings indexed 1,936 across all filing types
Latest filing 2026-05-20 Declaration of Voting R…
Country US United States of America
Listing US CLH

About CLEAN HARBORS INC

https://www.cleanharbors.com/

Clean Harbors Inc. is a provider of environmental, industrial, and energy services. The company specializes in comprehensive waste management, including the disposal and recycling of hazardous and non-hazardous materials, chemical packing, and specialized healthcare waste services. Its Industrial & Field Services division offers emergency response, industrial cleaning, hydro excavation, and production support. Clean Harbors also provides services to the oil and gas sector, such as lodging and equipment rentals. Through its Safety-Kleen brand, it delivers closed-loop solutions for recycling used oil and solvents, and markets high-performance lubricants. The company serves a diverse customer base across numerous industries, including manufacturing, energy, government, and healthcare.

Recent filings

Filing Released Lang Actions
8-K
Declaration of Voting Results & Voting Rights Announcements Classification · 95% confidence The document is a Form 8-K current report detailing the results of shareholder votes at Clean Harbors, Inc.’s 2026 Annual Meeting, including election of directors, advisory compensation vote, and auditor ratification. This matches the definition of a Declaration of Voting Results filing.
2026-05-20 English
8-K
Board/Management Information Classification · 92% confidence The document is a Form 8-K Current Report filed with the SEC, specifically reporting under Item 5.02 a departure of a director/officer (Executive Chairman and CTO retirement) and anticipated board appointment. This is a management change announcement, matching the Board/Management Information category.
2026-05-20 English
8-K
M&A Activity Classification · 85% confidence The document is a Form 8-K “Current Report” filed by Clean Harbors, Inc. reporting the completion of its acquisition of Terra Nova Solutions on May 14, 2026. This is an announcement of a merger/acquisition transaction (completion of acquisition). According to the filing definitions, announcements related to merger proposals or takeover bids fall under “M&A Activity” (Code: TAR). Therefore, the correct classification is TAR.
2026-05-14 English
10-Q - CLEAN HARBORS INC (0000822818) (Filer)
Interim / Quarterly Report Q1 2026
2026-05-06 English
8-K - CLEAN HARBORS INC (0000822818) (Filer)
Report Publication Announcement Classification · 90% confidence The document is a Form 8-K current report that does not include actual financial statements or results but instead states that a press release announcing the quarter’s results is furnished as Exhibit 99.1. Under the “menu vs meal” rule, this is not the report itself (the “meal”) but an announcement that the report (the press release) has been published and is attached. This matches the definition of a Report Publication Announcement.
2026-05-06 English
ARS - CLEAN HARBORS INC (0000822818) (Filer)
Annual Report
2026-04-10 English

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