Every material Form 8-K Clean Harbors has filed with the SEC since July 02, 2024, read and summarized by AI: what happened, the key figures, whether it reads positive or negative for shareholders, and how big a deal it is (impact 1-5). Newest first; each brief links to its own page and to the filing on SEC.gov.
Clean Harbors reported third-quarter 2026 revenue up 21% to $1.87 billion, with net income up 75% to $208.1 million, or $3.93 per diluted share. The company raised the midpoint of its 2026 Adjusted EBITDA and adjusted free cash flow guidance by $80 million, and announced that Eric Gerstenberg will become sole CEO on January 1, 2027, when co-CEO Mike Battles retires.
Q3 2026 revenue rose 21% to $1.87 billion; Adjusted EBITDA rose 42% to $456.1 million.
Net income rose 75% to $208.1 million, or $3.93 per diluted share, versus $2.21 a year earlier.
2026 Adjusted EBITDA guidance is $1.44 billion to $1.48 billion; adjusted free cash flow guidance is $600 million to $660 million.
Gerstenberg becomes sole CEO January 1, 2027; Battles retires as co-CEO and director on December 31, 2026.
Clean Harbors completed its acquisitions of EnviroServe and ES&H for a combined purchase price of $775 million, funded through available cash and a $600 million senior notes offering. The company said the two businesses are expected to generate combined annual revenues of about $340 million and post-synergy Adjusted EBITDA of about $87 million, a multiple of 8.9 times Adjusted EBITDA.
Clean Harbors issued $600.0 million of 6.250% senior notes due September 30, 2034, on October 1, 2026
$470 million of the note proceeds financed the EnviroServe purchase; the remainder is to repay revolver borrowings used for ES&H
ES&H acquisition closed September 18, 2026; EnviroServe acquisition closed October 2, 2026
Combined expected annual revenue of about $340 million and post-synergy Adjusted EBITDA of about $87 million
Clean Harbors reported second-quarter 2026 revenue of $1.74 billion, up 12%, with net income up 34% to $170.5 million, or $3.22 per diluted share. The company raised the midpoint of its 2026 Adjusted EBITDA guidance by $110 million and announced a planned $305 million cash acquisition of ES&H, which is expected to close in the second half of 2026.
Q2 2026 net income was $170.5 million, or $3.22 per diluted share, versus $126.9 million, or $2.36 per diluted share, a year earlier.
Q2 2026 Adjusted EBITDA rose 22% to $409.0 million, and the Adjusted EBITDA margin was 23.6%, up from 21.7%.
2026 Adjusted EBITDA guidance is now $1.35 billion to $1.41 billion, and adjusted free cash flow guidance is $520 million to $580 million.
A ten-year disposal contract with an estimated value of $600 million was awarded, and the ES&H acquisition is priced at $305 million in cash.
Clean Harbors said founder Alan McKim, its Executive Chairman and Chief Technology Officer, notified the Board on May 19, 2026 that he will retire from the Board and his CTO role once the Board appoints a new Chair. The company expects an independent Chair to be appointed in the summer of 2026 as part of a planned leadership transition, and the filing says the retirement does not reflect any disagreement with the company.
McKim notified the Board on May 19, 2026, and the company announced the retirement in a press release dated May 20, 2026.
The retirement takes effect when the Board appoints a new Chair, which is expected in summer 2026.
The filing states the retirement does not arise from any disagreement with the company on operations, policies or practices.
Edward Galante, lead independent director, and co-CEOs Mike Battles and Eric Gerstenberg were quoted in the press release.
Clean Harbors reported first-quarter 2026 revenue of $1.46 billion, up from $1.43 billion a year earlier, and net income of $63.2 million, or $1.19 per diluted share, versus $1.09 a year earlier. The company raised the midpoint of its 2026 Adjusted EBITDA guidance by $40 million and its adjusted free cash flow guidance by $10 million, though first-quarter adjusted free cash flow was negative $75.8 million.
Q1 revenue was $1.46 billion versus $1.43 billion in Q1 2025; income from operations rose 7% to $118.9 million.
Q1 net income was $63.2 million, or $1.19 per diluted share, versus $58.7 million, or $1.09 per share, a year earlier.
Full-year 2026 Adjusted EBITDA guidance is $1.24 billion to $1.30 billion, with the midpoint raised by $40 million.
Full-year 2026 adjusted free cash flow guidance is $490 million to $550 million, with the midpoint raised by $10 million; Q1 adjusted free cash flow was negative $75.8 million.
Clean Harbors reported fourth-quarter 2025 revenue of $1.50 billion and net income of $86.6 million, or $1.62 per diluted share, both up from the prior-year quarter. For full-year 2025, revenue reached a record $6.03 billion, but net income fell to $391.0 million from $402.3 million. The company also guided 2026 Adjusted EBITDA to $1.20 billion to $1.26 billion and expanded its buyback by $350 million.
Q4 2025 net income was $86.6 million, or $1.62 per diluted share, versus $84.0 million, or $1.55, a year earlier.
Full-year 2025 net income was $391.0 million, or $7.28 per diluted share, versus $402.3 million, or $7.42, in 2024.
2026 guidance: Adjusted EBITDA of $1.20 billion to $1.26 billion and adjusted free cash flow of $480 million to $540 million.
Agreed to acquire certain Depot Connect International businesses for about $130 million, with closing expected in the first half of 2026; buyback availability was raised to $600 million.
Clean Harbors reported third-quarter 2025 revenue of $1.55 billion and net income of $118.8 million, or $2.21 per diluted share, both up from the prior year. The company revised its full-year 2025 Adjusted EBITDA guidance to $1.155 billion to $1.175 billion, citing third-quarter performance that management described as lower than anticipated in Environmental Services, and raised its adjusted free cash flow guidance to $455 million to $495 million.
Q3 revenue was $1.55 billion versus $1.53 billion a year earlier; net income was $118.8 million, or $2.21 per diluted share, versus $2.12.
Q3 Adjusted EBITDA rose 6% to $320.2 million from $301.8 million.
Full-year 2025 Adjusted EBITDA guidance was revised to $1.155 billion to $1.175 billion; adjusted free cash flow guidance was raised to $455 million to $495 million.
The company plans a $210 million to $220 million facility to convert a re-refining byproduct into base oil, with commercial launch expected in 2028.
Clean Harbors sold $745.0 million of 5.750% senior notes maturing in 2033 and entered into an amended credit agreement with $1,260.0 million of new term loans. The proceeds are being used to refinance existing term loans and to redeem $545.0 million of 4.875% notes due 2027 on October 31, 2025, which changes the company's debt structure and maturities rather than reporting a change in operating results.
Notes issued October 9, 2025: $745.0 million, 5.750% senior unsecured, interest payable April 15 and October 15, maturing October 15, 2033
New Term Loans of $1,260.0 million mature October 9, 2032, priced at Term SOFR plus 1.50% and secured by substantially all company assets
Refinances about $1,457.3 million of existing term loans; remaining proceeds and cash on hand to redeem $545.0 million of 2027 notes on October 31, 2025
Clean Harbors reported second-quarter 2025 revenue of $1.55 billion, flat with a year earlier, while net income fell to $126.9 million from $133.3 million. Adjusted EBITDA rose to $336.2 million from $327.8 million, but the company reiterated the midpoints of its full-year 2025 guidance rather than raising them, so shareholders see lower reported profit alongside higher adjusted earnings.
Q2 2025 revenue was $1.55 billion, flat with Q2 2024; net income was $126.9 million, or $2.36 per diluted share, versus $133.3 million, or $2.46, a year earlier.
Adjusted EBITDA was $336.2 million, up from $327.8 million, with an Adjusted EBITDA margin of 21.7% versus 21.1%.
Full-year 2025 guidance midpoints were reiterated: Adjusted EBITDA of $1.16 billion to $1.20 billion and adjusted free cash flow of $430 million to $490 million.
The company expects Q3 2025 Adjusted EBITDA to grow 9% to 12% from the prior-year quarter.
Clean Harbors reported first-quarter 2025 revenue up 4% to $1.43 billion, but net income fell to $58.7 million, or $1.09 per diluted share, from $69.8 million, or $1.29, a year earlier. The company said it is maintaining its full-year 2025 Adjusted EBITDA and adjusted free cash flow guidance, which means shareholders see higher sales alongside lower earnings and no change to the outlook.
Revenue rose 4% to $1.43 billion from $1.38 billion; Adjusted EBITDA was $234.9 million versus $230.1 million
Net income was $58.7 million, or $1.09 per diluted share, versus $69.8 million, or $1.29, in Q1 2024; income from operations fell to $111.6 million from $125.5 million
Full-year 2025 guidance reiterated: Adjusted EBITDA of $1.15 billion to $1.21 billion and adjusted free cash flow of $430 million to $490 million
Q2 2025 Adjusted EBITDA is expected to grow 1-3% year over year
Clean Harbors reported fourth-quarter 2024 revenue up 7% to $1.43 billion, while net income fell to $84.0 million, or $1.55 per diluted share, from $98.3 million, or $1.81, a year earlier. For full-year 2024, revenue rose 9% to $5.89 billion and diluted EPS rose to $7.42 from $6.95, and the company guided to 2025 adjusted EBITDA of $1.15 billion to $1.21 billion.
Q4 2024 revenue rose 7% to $1.43 billion; Q4 diluted EPS was $1.55 versus $1.81 in Q4 2023.
Full-year 2024 net income was $402.3 million, or $7.42 per diluted share, versus $377.9 million, or $6.95, in 2023.
2025 guidance: adjusted EBITDA of $1.15 billion to $1.21 billion and adjusted free cash flow of $430 million to $490 million.
In Q1 2025, the company expects Environmental Services adjusted EBITDA to grow 4% to 6% and consolidated adjusted EBITDA to be flat.
Clean Harbors reported third-quarter 2024 revenue up 12% to $1.53 billion, net income up 26% to $115.2 million, and diluted EPS of $2.12 versus $1.68 a year earlier. The company also revised its full-year 2024 Adjusted EBITDA and adjusted free cash flow guidance, now projecting Adjusted EBITDA of $1.10 billion to $1.12 billion, though the filing does not state the prior range.
Q3 revenue grew 12% to $1.53 billion; income from operations rose 25% to $192.3 million
Q3 net income was $115.2 million, or $2.12 per diluted share, versus $91.3 million, or $1.68, in Q3 2023
Full-year 2024 Adjusted EBITDA guidance is $1.10 billion to $1.12 billion; adjusted free cash flow guidance is $280 million to $320 million
Safety-Kleen Sustainability Solutions segment faced weaker base oil demand and pricing; its Adjusted EBITDA rose 32% to $41.2 million in Q3
Clean Harbors entered into Amendment No. 6 to its credit agreement on October 8, 2024. The amendment removes the SOFR adjustment on its 2021 Incremental Term Loans and sets the margin at 1.75% for Term SOFR borrowings and 0.75% for base rate borrowings, lowering the company's borrowing cost on that debt.
Amendment No. 6 dated October 8, 2024, with Goldman Sachs Lending Partners LLC as administrative agent and collateral agent
Eliminates the SOFR Adjustment, which had been 0.11448%, 0.26161% and 0.42826% per annum for one-, three- and six-month tenors
Post-repricing margins: 1.75% for Term SOFR borrowings and 0.75% for base rate borrowings; six-month soft call period reset
Company paid customary fees and expenses to the agent and lead arranger; full text filed as Exhibit 4.43H
Clean Harbors said on September 3, 2024 that it expanded its board from eleven to thirteen members and elected Co-Chief Executive Officers Michael Battles and Eric Gerstenberg as directors, effective immediately. The filing does not change either executive's role, and neither will receive extra pay for board service, so the direct effect on shareholders is limited to governance.
Board expanded from eleven to thirteen members; both new directors are Class III directors whose terms expire at the 2025 annual meeting.
Battles has been Co-CEO since 2023 and was CFO from 2016; Gerstenberg has been Co-CEO since 2023 and was COO since 2015.
Neither director was appointed to a board committee, and neither will receive additional compensation for board service.
Founder and Executive Chairman Alan S. McKim said the co-CEOs' first year and a half in charge had been successful for the Company, its employees and its shareholders.
Clean Harbors reported second-quarter 2024 results on July 31, 2024, with revenue up 11% to $1.55 billion and net income up 15% to $133.3 million, or $2.46 per diluted share. The company raised its full-year 2024 Adjusted EBITDA guidance to a range of $1.125 billion to $1.165 billion, which points to higher expected profit for shareholders.
Q2 2024 revenue rose 11% to $1.55 billion, and income from operations rose 14% to $215.5 million.
Net income was $133.3 million, or $2.46 per diluted share, compared with $2.13 per diluted share in Q2 2023.
Full-year 2024 Adjusted EBITDA guidance raised to $1.125 billion to $1.165 billion, midpoint $1.145 billion.
Company expects Q3 2024 Adjusted EBITDA to grow 20% to 24% from Q3 2023.
Clean Harbors and a Canadian subsidiary entered into a seventh amended and restated credit agreement with Bank of America, N.A. on June 28, 2024, replacing the prior facility. The revolving credit facility increases to a maximum of $600.0 million and runs through June 28, 2029, with no loans outstanding under the prior agreement at closing. The filing does not report earnings or guidance, so its effect on shareholders is limited to financing terms and covenants.
Maximum revolving facility increased to $600.0 million; U.S. line up to $550.0 million and Canadian line up to $50.0 million
Facility expires June 28, 2029, subject to certain conditions
$136.4 million of letters of credit remain outstanding under the new agreement; no loans were outstanding at closing
Borrowings priced at Term SOFR or Term CORRA plus 1.5%, with lower base-rate margins of 0.5%
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