Clean Harbors delivered third quarter results that surpassed Wall Street’s expectations, driven by broad-based growth across both its Environmental Services and Safety-Kleen Sustainable Solutions segments. Management attributed outperformance to a surge in emergency response activity, notably a significant warehouse fire clean-up, as well as sustained demand for refined oil products amid tight global supply. Co-CEO Eric Gerstenberg highlighted that “Field Services revenue was up more than 70% compared to a year ago,” while CFO Eric Dugas pointed to “record quarterly margin in our company’s history.” The company also reported strong progress in integrating recent acquisitions and maintaining industry-leading safety performance.
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Clean Harbors (CLH) Q3 2026 highlights:
- Revenue $1.87 billion vs S&P analysts’ estimates of $1.73 billion (20.7% year-on-year growth, 8.3% beat)
- Adjusted EPS $3.93 vs S&P analysts’ estimates of $3.22 (22% beat)
- Adjusted EBITDA $456.1 million vs analyst estimates of $409.1 million (24.4% margin, 11.5% beat)
- EBITDA guidance $1.46 billion at the midpoint for the full year, above analyst estimates of $1.42 billion
- Operating margin 17%, up from 12.5% in the same quarter last year
- Market capitalization $16.31 billion
While we enjoy listening to the management’s commentary, our favorite part of earnings calls is the analyst questions. Those are unscripted and can often highlight topics that management teams would rather avoid or topics where the answer is complicated. Here is what has caught our attention.
Our top 5 analyst questions from Clean Harbors’s Q3 earnings call
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Noah Kaye (Oppenheimer) asked about the ROI and scalability of the Los Angeles hub strategy. Co-CEO Eric Gerstenberg highlighted operational efficiencies and cross-business growth, noting it is the largest hub investment to date.
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Bryan Burgmeier (unknown firm) inquired about captive incinerator trends amid reshoring. Gerstenberg explained that reshoring is shifting waste streams, providing Clean Harbors with opportunities as some captive incinerators become less viable.
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Patrick Brown (Raymond James) questioned the revenue impact and sustainability of large emergency response events. CFO Eric Dugas detailed that the Q3 spike was mainly due to a single warehouse fire, with future large events considered upside rather than baseline.
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Adam Bubes (Goldman Sachs) probed the M&A environment and integration pace. Gerstenberg and outgoing Co-CEO Mike Battles described the strong pipeline and disciplined approach, emphasizing that recent acquisitions fit Clean Harbors’ core capabilities.
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Nandita Nayar (Bank of America) sought clarity on Environmental Services (ES) margin sustainability excluding emergency events and the timeline for reaching 30% margins. Dugas stated that 25–50 basis points of annual expansion is likely, with 30% as a long-term aspirational goal.
Catalysts in upcoming quarters
In coming quarters, the StockStory team will closely monitor (1) the ramp-up and cross-segment impact of the new Los Angeles hub and integration of ES&H and EnviroServe, (2) continued PFAS revenue growth and legislative developments affecting environmental regulations, and (3) the pace at which data center and reshoring-driven contracts translate into recurring revenue. Execution against these milestones will be key for sustained margin improvement and free cash flow generation.
Clean Harbors currently trades at $305.26, down from $312.92 just before the earnings. Is there an opportunity in the stock? Find out in our full research report (it’s free).
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