Welcome to our dedicated page for Clean Harbors SEC filings (Ticker: CLH), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Understanding Clean Harbors' SEC filings reveals how North America's largest hazardous waste company structures its Environmental Services and Safety-Kleen segments. The company's 10-K annual reports break down revenue between hazardous waste disposal, emergency response services, and used oil re-refining operations, showing which segments drive margins and growth.
Clean Harbors' quarterly 10-Q filings track the cyclicality of industrial cleaning contracts, emergency response project volumes, and the used oil collection business. These reports disclose pricing trends in hazardous waste incineration and landfill disposal, metrics that signal competitive positioning in a capacity-constrained industry. Our AI summaries highlight segment performance without requiring you to parse accounting footnotes.
Form 4 insider transactions show when Clean Harbors executives and directors buy or sell shares, providing signals about management confidence. The company's 8-K filings announce major contract wins, facility expansions, and developments in PFAS treatment capabilities. Proxy statements (DEF 14A) detail executive compensation tied to environmental compliance and financial performance metrics.
For investors analyzing the environmental services sector, Clean Harbors' filings reveal permitted capacity utilization, regulatory capital expenditures, and the pricing dynamics of hazardous waste destruction services. Access all Clean Harbors SEC filings with AI-powered analysis that explains what each document means for the investment thesis.
Clean Harbors Inc. executive EVP/CIO (CHESI) reported a routine insider transaction involving company common stock. On 01/02/2026, 525 shares of Clean Harbors common stock were withheld at a price of $234.48 per share, coded as an “F” transaction, which indicates shares were withheld to cover tax liabilities upon vesting of equity awards rather than sold in the open market. After this withholding, the reporting person beneficially owned 27,241 shares directly.
Clean Harbors Inc. director reports charitable stock gift. A company director reported a transaction dated 12/17/2025 involving common stock of Clean Harbors Inc. The filing shows a charitable gift of 415 shares, coded as a gift transaction, at a reported price of $0 per share. After this transfer, the director directly beneficially owns 10,987 shares of Clean Harbors common stock. The transaction is reported as being filed by one reporting person and reflects a personal transfer rather than a market sale.
Clean Harbors, Inc. officer Rebecca Underwood, President & EVP Facilities, reported a small tax-related share withholding. On 12/15/2025, 51 shares of common stock were disposed of at $240.71 per share under transaction code “F,” with the explanation stating this represented payment of tax liability by withholding securities upon vesting of equity awards in accordance with Rule 16b-3.
After this transaction, she directly beneficially owns 17,284 shares of Clean Harbors common stock. This reflects a routine insider tax-withholding event rather than an open-market purchase or sale.
Clean Harbors Inc. executive vice president of EHS reported a small, tax-related stock disposition. On 12/15/2025, 16 shares of common stock were withheld at a price of $240.71 per share to pay tax liabilities arising from vesting equity awards, consistent with Rule 16b-3. After this transaction, the officer directly owns 5,785 shares of Clean Harbors common stock.
Clean Harbors Inc. reported an insider equity transaction by its Executive Vice President of Industrial Services. On 12/15/2025, the officer had 28 shares of common stock withheld at a price of $240.71 per share.
The filing explains this was a payment of tax liability by withholding shares incident to the vesting of previously granted securities, in line with Rule 16b-3. After this tax-related withholding, the executive directly beneficially owns 8,814 shares of Clean Harbors common stock.
Clean Harbors Inc. co-CEO Eric W. Gerstenberg reported selling 601 shares of common stock on December 16, 2025 at a price of $240.9 per share. After this insider sale, he beneficially owns 50,454 shares of Clean Harbors common stock held directly.
A holder of the issuer’s common stock filed a notice to sell 601 shares through broker Raymond James & Associates on the NYSE, with an approximate sale date of 12/15/2025 and an aggregate market value of $145,000.00.
The securities are common stock that were acquired on 07/01/2025 from the issuer as equity compensation, with payment on that same date in equity. The issuer reports that 53,431,835 shares of this class are outstanding.
The notice states that the person for whose account the securities are to be sold represents that they do not know any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed, and it reminds filers that intentional misstatements or omissions can constitute federal criminal violations.
Clean Harbors Inc. executive vice president (CHESI) reported a charitable gift of company stock. On 12/09/2025, the officer made a Form 4 filing showing a disposition of 1,000 shares of Clean Harbors common stock coded as a charitable gift, at a reported price of $0. After this transaction, the officer directly beneficially owns 47,664 shares of Clean Harbors common stock.
Clean Harbors Inc. executive reports small share withholding for taxes. An officer of CLEAN HARBORS INC (CLH), serving as EVP, EHS, reported a Form 4 transaction dated 12/01/2025. The filing shows a disposition of 122 shares of common stock at $228.54 per share, coded as transaction type “F,” which the notes explain was a share withholding to cover tax liabilities on vesting equity under Rule 16b-3.
Following this tax-related transaction, the reporting person directly beneficially owns 5,801 shares of Clean Harbors common stock. This type of event is a routine administrative adjustment tied to equity compensation rather than an open-market purchase or sale.
Clean Harbors (CLH) reported an insider transaction by director Lauren States. On 11/13/2025, she made a bona fide charitable gift (Code G) of 245 shares of common stock at $0, lowering her directly owned stake to 11,496 shares after the transaction. This was a non-cash transfer and reflects a personal donation rather than an open-market trade.
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