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 (CLH) executive Robert W. Harrison, EVP EHS, reported equity compensation and related tax withholding transactions. On 02/01/2026 he received 1,003 shares as a performance-based restricted stock award that will vest 50% on 3/15/2028 and 50% on 3/15/2029, based on goals for the 2027 performance period.
He also received 430 shares as a time-based restricted stock award vesting 25% annually from February 1, 2027 through February 1, 2030. On 02/02/2026, 184 shares were withheld at $259.91 per share to cover tax liabilities from vesting. After these transactions, he directly owned 7,034 common shares.
Clean Harbors, Inc. co-CEO Eric W. Gerstenberg reported several equity compensation moves and related tax withholding. On February 1, 2026, he received 10,290 shares of performance-based restricted stock and 10,690 shares of time-based restricted stock at $0 per share. On February 2, 2026, 4,934 shares were withheld at $259.91 per share to cover tax liabilities tied to vesting. After these transactions, he directly held up to 66,500 shares of Clean Harbors common stock. The performance-based award is scheduled to vest in two equal parts in 2028 and 2029, subject to goal achievement, while the time-based award vests in four equal annual installments from 2027 through 2030.
Clean Harbors EVP Industrial Services Charles H. Geer II reported routine equity transactions in company common stock. On February 1, 2026, he received two stock awards: 1,843 shares as a performance-based restricted stock award and 503 shares as a time-vesting restricted stock award, both at no cash cost.
On February 2, 2026, 197 shares were withheld at $259.91 per share to cover tax liabilities related to vesting, as permitted under Rule 16b-3. After these transactions, he directly held 10,963 shares of Clean Harbors common stock.
Clean Harbors executive Sharon M. Gabriel, EVP/CIO (CHESI), reported several stock transactions in early February 2026. On February 1, 2026, she received two awards of common stock: 2,073 shares from a performance-based restricted stock award and 566 shares from a time-based restricted stock award, both at $0 per share.
The performance-based award will vest 50% on March 15, 2028 and 50% on March 15, 2029, depending on meeting goals for the period from January 1, 2027 through December 31, 2027. The time-based award vests 25% each on February 1 of 2027, 2028, 2029, and 2030.
On February 2, 2026, 508 shares of common stock were withheld at $259.91 per share to cover tax liabilities upon vesting, in accordance with Rule 16b-3. After these transactions, Gabriel directly owned 26,733 common shares of Clean Harbors.
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.