CLEAN HARBORS INC (CLH) SEC Filings, Jul-Aug 2026

Clean Harbors Inc. executive George L. Curtis, Executive Vice President (CHESI), reported a Form 4 transaction involving company common stock. On July 1, 2026, 1,757 shares were withheld to pay tax liability associated with vesting of equity awards, at a price of $290.74 per share. After this withholding, Curtis directly held 44,291 shares of common stock. The disclosure states the withholding was incident to vesting in accordance with Rule 16b3, rather than an open-market sale.

FMR LLC filed a beneficial ownership report for CLEAN HARBORS INC common stock. FMR reports beneficial ownership of 3,002,654.18 shares, representing 5.7% of the class. FMR has sole dispositive power over all reported shares and sole voting power over 2,996,004.00 shares, with no shared voting or dispositive power.

Abigail P. Johnson is also listed as a reporting person with sole dispositive power over the same 3,002,654.18 shares and a 5.7% stake, but without sole or shared voting power. One or more other persons may receive dividends or sale proceeds for these shares, but no such person has more than five percent of the issuer’s outstanding common stock.

Clean Harbors Inc director Andrea Robertson reported selling 789 shares of Common Stock on 2026-08-03 at $314.0100 per share in a sale described as an open market or private transaction. After this trade, she directly owns 8,979 shares of Clean Harbors common stock. The transaction is not indicated as being made under a Rule 10b5-1 trading plan.

Clean Harbors, Inc. delivered strong Q2 2026 results, with total direct revenues of 1,735,005 (in thousands), up 11.9% year over year, and six‑month direct revenues of 3,194,542 (in thousands), up 7.1%. Q2 net income rose to 170,464 (in thousands) and six‑month net income to 233,665 (in thousands), increases of 34.3% and 25.9% versus 2025, driving diluted EPS of $3.22 for the quarter and $4.41 year‑to‑date.

Adjusted EBITDA grew 21.6% in Q2 to 409,024 (in thousands) and 15.0% year‑to‑date to 656,878 (in thousands), with Adjusted EBITDA margin expanding 190 and 140 basis points, helped by higher pricing, PFAS‑related project work and improved Safety‑Kleen Sustainability Solutions oil product spreads. Environmental Services revenues grew 7.7% in Q2 on higher Technical Services, Safety‑Kleen core services and emergency response work, while SKSS revenues increased 40.8% on stronger base and blended oil pricing and higher‑priced used‑oil collection.

Net cash from operating activities for the first half rose to 245,470 (in thousands), supporting significant capital spending and acquisitions. During 2026 the company closed the all‑cash $225.8 million Terra Nova Solutions acquisition, the $131.8 million Depot Connect environmental businesses acquisition and the $30 million Western Oil purchase, and signed a purchase agreement to acquire ES&H for approximately $305 million, to be funded with a combination of available cash and debt financing. Cash and cash equivalents ended at 408,357 (in thousands), with long‑term debt at 2,786,100 (in thousands) at par and no outstanding loan balance under the $600.0 million revolving credit facility.

Clean Harbors reported record second-quarter 2026 results, with revenue up 12% to $1.74 billion and net income up 34% to $170.5 million, or $3.22 per diluted share. Income from operations reached $268.9 million, while Adjusted EBITDA grew 22% to $409.0 million, lifting the margin to 23.6%.

The Environmental Services segment delivered its 17th consecutive quarter of year-over-year Adjusted EBITDA margin expansion, supported by 18% Technical Services revenue growth, 91% incineration utilization and 7% higher landfill volumes. Safety-Kleen Sustainability Solutions revenue increased 41% and Adjusted EBITDA rose 143%, aided by stronger re-refined product pricing; the unit collected 61 million gallons of waste oil.

Clean Harbors also announced a ten-year disposal contract with an estimated value of $600 million, beginning in the fourth quarter and expected to reach full capacity in 2030. It agreed to acquire ES&H for $305 million in cash, adding about $90 million of annual revenue and $30 million of Adjusted EBITDA. For 2026, management now guides to Adjusted EBITDA of $1.35-$1.41 billion and adjusted free cash flow of $520-$580 million, raising both midpoints.

On July 17, 2026, Clean Harbors Inc. executive chair and CTO Alan S. McKim reported a tax-withholding disposition of 1,265 shares of common stock at $310.58 per share, used to satisfy tax liabilities on vesting awards under Rule 16b3. After this withholding, he holds 30,154 shares directly and indirectly holds 2,065,368 shares in the McKim 2007 Trust, 67,093 shares in the McKim 2025 Annuity Trust, and 100,000 shares in the McKim 2026 Annuity Trust.

CLEAN HARBORS INC executive Gabriel M. Sharon reported a small tax-related share disposition. On the reported date, 359 shares of Common Stock were withheld at a price of $290.74 per share to cover tax liabilities tied to vesting of equity awards.

After this tax-withholding transaction, Sharon directly holds 20,706 shares of CLEAN HARBORS INC common stock. The filing notes that the withholding was conducted in accordance with Rule 16b-3, indicating it was an administrative, compensation-related event rather than an open-market trade.

CLEAN HARBORS INC executive Brian P. Weber reported a routine tax-related share disposition. On July 1, 2026, 814 shares of common stock were withheld at $290.74 per share to cover tax liabilities tied to vesting, as permitted under Rule 16b-3. Following this withholding, Weber directly holds 47,914 shares of common stock, so the withheld amount represents only a fraction of his overall position and does not reflect an open-market sale.