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.
The Clean Harbors, Inc. (NYSE: CLH) SEC filings page on Stock Titan provides direct access to the company’s regulatory disclosures, along with AI-assisted summaries to help interpret key points. Clean Harbors is a Massachusetts corporation and a self-described leading provider of environmental and industrial services, with operations in the United States, Canada, Mexico, Puerto Rico and India. Its filings with the U.S. Securities and Exchange Commission offer detailed insight into the business, capital structure and risk profile.
Investors can use this page to review annual reports on Form 10-K and quarterly reports on Form 10-Q, which describe segment performance for Environmental Services and Safety-Kleen businesses, including Safety-Kleen Sustainability Solutions. These reports also discuss hazardous waste management, industrial services, used oil re-refining, PFAS-related activities and the wide range of risks the company identifies, from operational and safety issues to regulatory and financial considerations.
Current reports on Form 8-K document material events such as quarterly earnings announcements, senior notes offerings, amendments to credit agreements and other significant developments. For example, Clean Harbors has filed 8-Ks describing the issuance of 5.750% senior notes due 2033, amendments to its term loan credit facility and the release of financial results for specific quarters.
Through this page, users can also track debt and capital structure disclosures, including indentures and credit agreements referenced in exhibits to 8-K filings. Stock Titan’s AI tools summarize complex legal and financial language, highlighting items such as covenant packages, maturity profiles and redemption features, so readers can quickly understand how new financings affect Clean Harbors’ obligations.
In addition, this resource can surface insider transaction filings (Form 4) when available, giving a view into equity transactions by directors and officers. Combined with real-time updates from EDGAR and AI-generated explanations, the Clean Harbors filings page is designed to make the company’s regulatory record more accessible to investors, analysts and anyone researching CLH.
Clean Harbors executive Sharon M. Gabriel, EVP/CIO (CHESI), reported several stock transactions in early
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Clean Harbors EVP and CFO Eric J. Dugas reported several equity-related transactions in company common stock. On 02/02/2026, 567 shares were withheld at $259.91 per share to cover tax obligations tied to vesting under Rule 16b-3.
On 02/01/2026, he received a performance-based restricted stock award of 3,066 shares, vesting 50% on 3/15/2028 and 50% on 3/15/2029, subject to performance goals for the 1/1/2027–12/31/2027 period. He also received a time-based restricted stock award of 1,022 shares, vesting in four equal annual installments from February 1, 2027 through February 1, 2030. Following these transactions, he directly owned 22,809 shares of Clean Harbors common stock.
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.