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 INC (CLH) reported an insider transaction by Co-CEO Eric W. Gerstenberg. On 2026-08-14, he sold 2,500 shares of Common Stock at $321.34 per share in a sale described as an open market or private transaction. Following this sale, he directly holds 56,793 shares of Clean Harbors common stock.
Clean Harbors (CLH) reports a planned sale of common stock through Raymond James & Associates, Inc. The filing covers 2,500 shares of common stock with an aggregate market value of $805,000.00, with a stated sale date of August 14, 2026, on the NYSE. The company also lists recent common stock transactions related to equity compensation on February 1, 2026, March 15, 2026, and July 1, 2026, involving 856, 1,042, and 602 shares, respectively.
CLEAN HARBORS INC executive Eric W. Gerstenberg, Co-CEO, reported a disposition of 564 shares of common stock on 2026-07-01 coded as a payment of tax liability by withholding securities. The shares were valued at $290.74 per share, and his directly held stake after this event is 59,293 shares. A footnote clarifies the transaction represents tax withholding upon vesting under Rule 16b-3, and another footnote corrects the reported total number of shares held.
Clean Harbors Inc. reported an amended insider transaction by Co-CEO Eric W. Gerstenberg. On 2026-03-18, he executed a sale of 1,000 shares of Common Stock at a price of $293.00 per share in an open market or private transaction. Following this sale, his directly held position is reported as 59,857 shares, with a footnote stating this reflects a correction to the total number of shares held.
Clean Harbors Inc. Co-CEO Eric W. Gerstenberg reported two non-derivative dispositions of common stock on March 13, 2026. The first involved 977 shares used for payment of tax liability by withholding shares upon vesting, at a reference price of $288.93 per share, in accordance with Rule 16b. The second was a disposition of 2,166 shares to the issuer, representing restricted stock forfeited because the company did not achieve performance targets under its Long Term Equity Incentive Program. A separate footnote indicates a correction to the total number of shares held, but the updated post-transaction holdings are not stated in this report.
Clean Harbors Inc Co-CEO Eric W. Gerstenberg reported selling 2,500 shares of common stock on 2026-02-23 in a sale classified as an open market or private transaction at $279.86 per share. Following the sale, he directly holds 64,000 shares, with a footnote indicating this filing corrects the total number of shares held.
CLEAN HARBORS INC executive vice president and chief financial officer Eric J. Dugas reported a Form 4/A amendment detailing a code F transaction. On 2026-07-01, 447 shares of common stock were disposed of at $290.74 per share as a payment of tax liability by withholding of securities incident to vesting in accordance with Rule 16b-3. Following this withholding transaction and a correction, Dugas directly held 17,620 shares of common stock.
CLEAN HARBORS INC executive vice president and chief financial officer Eric J. Dugas reported two dispositions of common stock on March 13, 2026. First, 630 shares were withheld at $288.93 per share to pay tax liability upon vesting of equity awards under Rule 16b-3. Second, 1,324 shares of restricted stock were forfeited back to the company because performance targets under its Long Term Equity Incentive Program were not achieved. A footnote also indicates a correction to the total number of shares held, though the corrected balance is not stated here.
Clean Harbors Inc. executive vice president and chief financial officer Eric J. Dugas reported a sale of 2,788 shares of common stock on 2026-02-20 at $281.31 per share in an open-market or private transaction. Following this transaction, he directly holds 20,021 shares of common stock. The amendment notes a correction to the total number of shares held after the transaction. The Rule 10b5-1 trading-plan checkbox was not marked as applicable.
Clean Harbors, Inc. entered into a definitive agreement to acquire EnviroServe, a national environmental and waste management services provider, for $470 million in cash from an affiliate of One Rock Capital Partners. The transaction is expected to close in the second half of 2026, subject to regulatory approval and customary closing conditions, and will be funded with available cash and additional debt financing.
EnviroServe serves nearly 2,500 customers through a network of 40 locations, supported by permits in 48 states, including 18 10-day transfer facilities, several solidification facilities and railcar cleaning locations. On an adjusted basis, EnviroServe is expected to generate approximately $27 million of Adjusted EBITDA on approximately $250 million of revenues, with about 85% of revenue recurring and average tenure of the top 10 customers exceeding 16 years.
Clean Harbors anticipates approximately $25 million of cost synergies over the first two years following closing, implying a post-synergy acquisition multiple of about 9x Adjusted EBITDA. EnviroServe has more than 700 employees and a specialized fleet of over 700 vehicles, including more than 100 vacuum trucks, and reported a sub 1.0 Total Recordable Incident Rate in the most recent year.