Clean Harbors (CLH) Q2 2026 earnings review
Massive SKSS Margin Surge and Reshoring Tailwinds Drive a Breakout Quarter
Clean Harbors delivered a blowout Q2, accelerating revenue growth to 12% YoY and pushing Net Income up 34%. The narrative shifted dramatically from steady core execution to explosive profitability in the Safety-Kleen Sustainability Solutions (SKSS) segment, where Adjusted EBITDA skyrocketed 143% due to global refined product supply disruptions. Coupled with a landmark $600M disposal contract tied to U.S. manufacturing expansion, management confidently raised FY26 EBITDA guidance by $110M. While core Environmental Services remained stable, the current earnings explosion relies heavily on geopolitical macro factors in the oil market.
🐂 Bull Case
A severe global supply disruption in refined products sent base oil prices soaring. Clean Harbors aggressively capitalized on the spread, expanding SKSS segment margins by over 70% and driving segment EBITDA up 143%.
The massive new $600M, ten-year disposal contract validates the long-term bull thesis: U.S. manufacturing expansion and reshoring require industrial-scale hazardous waste management.
🐻 Bear Case
The lion's share of the margin beat is driven by the SKSS segment's exposure to oil market volatility. If global supply chains normalize, this massive margin tailwind will disappear.
Under the hood of the massive EBITDA beat, unallocated corporate expenses grew significantly from -$78.3M in 25Q2 to -$90.1M in 26Q2, an acceleration in overhead costs that drags on operating leverage.
⚖️ Verdict: 🟢
Bullish. Management is executing perfectly on factors they control (pricing, PFAS, $600M contract wins) while aggressively harvesting cash from macro factors they don't (global oil disruptions). The sheer size of the guidance raise reflects high visibility into near-term cash generation.
Key Themes
SKSS Segment Profitability Explosion
The SKSS segment is reversing years of margin pressure to become the standout growth driver. Segment revenue grew 41%, but Adjusted EBITDA surged an astonishing 143% to $93M. Management explicitly tied this to favorable 'market conditions resulting from major global supply disruptions of refined products,' combined with structural improvements from their charge-for-oil (CFO) pricing strategy.
U.S. Manufacturing Reshoring Tailwinds
The macro narrative of U.S. industrial reshoring has materialized into hard backlog. The company secured a ten-year, $600M disposal contract to manage incineration and wastewater for an expanding U.S. manufacturing customer. Ramping to full capacity by 2030, this deal provides exceptional long-term revenue visibility and locks in high-margin utilization for their disposal network.
Environmental Services Steady Margin Expansion
Stable and accelerating. The ES segment delivered its 17th consecutive quarter of year-over-year EBITDA margin expansion, reaching 27.9%. Technical Services grew a robust 18% YoY, supported by high incinerator utilization (91%) and a 7% increase in landfill volumes, heavily supplemented by the continued acceleration in the PFAS remediation pipeline.
Aggressive Field Services M&A
Clean Harbors is using its pristine balance sheet to execute a $305M cash acquisition of ES&H. Paying a post-synergy multiple of 8.7x for $90M in base revenues and $30M in Adjusted EBITDA, this bolsters the Gulf Coast Field Services presence and on-water response capabilities, areas that have recently struggled to comp against prior-year emergency events.
Sustainability of SKSS Pricing Power
While the 143% EBITDA growth in SKSS is spectacular, management explicitly credits 'supply disruptions.' This is a cyclical, geopolitical macro tailwind. If global refining capacity stabilizes, the spread will compress, leaving Clean Harbors to face incredibly difficult YoY comparisons in H1 2027.
Divergence Between FCF and Net Income Due to CapEx
While Net Income surged 34%, Adjusted Free Cash Flow was essentially flat YoY ($135.7M vs $133.2M). The culprit was a massive acceleration in capital expenditures, with additions to PP&E jumping from $90.0M in 25Q2 to $126.2M in 26Q2. Capital intensity is rising to support future capacity.
Corporate Overhead Expansion
SG&A expenses accelerated drastically, growing 15% YoY ($214.5M vs $186.1M), outpacing total revenue growth. Consequently, the Corporate segment's negative Adjusted EBITDA widened from -$78.3M to -$90.1M. The company is generating massive gross profits but is simultaneously building a heavier corporate cost structure.
Other KPIs
Decelerating/Worsening. The drag from unallocated corporate costs increased significantly versus -$78.3M in the prior year. This indicates aggressive internal investments, incentive compensations, or overhead additions that are diluting the exceptional operational leverage seen at the segment level.
Decelerating compared to the broader ES segment (+11 to 18% growth). Management attributed this to difficult comparisons against large emergency response projects in the prior year. The planned $305M acquisition of ES&H is a strategic move to inject inorganic growth into this specific lagging division.
Guidance
Accelerating. The midpoint of $1.38B is a massive $110M increase from the prior $1.27B target. This represents roughly 18% YoY growth versus FY25's ~$1.17B. The raise is heavily front-loaded by the SKSS supply shock realized in Q2 and expected to persist into Q3.
Accelerating. Management explicitly expects the favorable supply conditions in SKSS to extend into the third quarter, driving another period of outsized, high-20s percentage earnings growth before potentially normalizing.
Accelerating. Raised by $30M at the midpoint to $550M. While strong, it is notable that the FCF raise ($30M) is significantly smaller than the EBITDA raise ($110M), reflecting higher cash taxes, working capital needs, and the heavier CapEx burden seen in the Q2 results.
Key Questions
SKSS Margin Durability
You attributed the SKSS blowout to 'global supply disruptions.' How much of the Q2 segment margin (or the $93M EBITDA) do you view as structural due to the CFO model, versus cyclical commodity tailwinds that will reverse when supply normalizes?
CapEx and FCF Conversion
Additions to PP&E spiked to $126M this quarter, and your full-year FCF raise was only $30M compared to a $110M EBITDA raise. Is capital intensity permanently stepping up to service mega-contracts like the $600M disposal deal?
Corporate Cost Discipline
Corporate segment negative EBITDA expanded by $12M year-over-year. What is driving this 15% increase in SG&A, and how should we think about corporate overhead as a percentage of sales exiting 2026?
Data Center Strategy
You briefly mentioned introducing a 'new strategic offering for data centers.' Given the massive infrastructure build-out in that space, what specific environmental or industrial services are you targeting, and what is the total addressable market?