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.
Clean Harbors, Inc. SEC filings document formal disclosures for an environmental and industrial services company operating through Environmental Services and Safety-Kleen Sustainability Solutions. Form 8-K reports furnish operating and financial results, including segment performance, revenue, operating income, adjusted EBITDA, cash flow, guidance and share repurchase activity tied to hazardous waste management, industrial services, recycling and used-oil re-refining.
The company’s filings also cover capital-structure and governance matters. Material-event filings describe debt financing activity, including senior notes due 2033 and related refinancing arrangements. Proxy statements document board and shareholder voting matters, executive compensation, pay-versus-performance disclosures and other governance information for Clean Harbors’ public-company structure.
Clean Harbors executive Jeroen Diderich reported equity compensation and a small tax-related share withholding. On 02/01/2026 he received 3,141 shares of common stock as a performance-based restricted stock award that will vest 50% on 3/15/2028 and 50% on 3/15/2029, tied to goals for the 1/1/2027–12/31/2027 performance period. He also received a 1,047-share restricted stock award vesting 25% annually on February 1 of 2027, 2028, 2029 and 2030. On 02/02/2026, 105 shares were withheld at $259.91 per share to cover tax liabilities upon vesting, leaving him with 13,667, 16,808 and then 17,855 directly owned shares after the respective transactions.
CLEAN HARBORS INC executive George L. Curtis reported a small share withholding to cover taxes. On February 2, 2026, 249 shares of Common Stock were withheld at $259.91 per share, coded as an F transaction.
This withholding satisfied tax liability related to vesting of securities in accordance with Rule 16b-3. After this transaction, Curtis directly beneficially owned 47,415 shares of Clean Harbors common stock.
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.