Clean Harbors Lifts Guidance On Margin Strength

Clean Harbors ((CLH)) has held its Q1 earnings call. Read on for the main highlights of the call.

Clean Harbors’ latest earnings call struck a notably upbeat tone as management pointed to expanding margins, stronger profitability and higher full‑year guidance. While acknowledging weather disruptions, industrial-services softness and heavier capital spending, executives emphasized robust demand in Environmental Services, strong outperformance at Safety‑Kleen Sustainable Solutions and healthy balance-sheet capacity to keep investing and buying back stock.

Stronger Profitability and Margin Expansion

Clean Harbors delivered adjusted EBITDA of $248 million in Q1, up 6% year over year, with margin improving 60 basis points to 17%. Income from operations climbed 7% to $119 million, while net income increased 8%, translating into earnings per share of $1.19 and underscoring the company’s ability to convert modest revenue growth into outsized profit gains.

Raised Full‑Year Adjusted EBITDA Guidance

Management raised 2026 adjusted EBITDA guidance to a range of $1.24 billion to $1.30 billion, lifting the midpoint by $40 million to $1.27 billion and implying about 9% growth versus 2025. For the near term, the company expects Q2 consolidated adjusted EBITDA to rise 5% to 9% year over year, signaling confidence that margin strength and operational momentum will continue.

Environmental Services Momentum

Environmental Services remained a growth engine, with segment revenue up more than $40 million in Q1, led by project work such as PFAS remediation and emergency response. ES posted its 18th straight quarter of EBITDA growth and 16th consecutive quarter of margin expansion, with margins up 50 basis points and March revenue roughly 10% higher year over year as landfill volumes surged 34%.

Safety‑Kleen Sustainable Solutions Outperformance

Safety‑Kleen Sustainable Solutions delivered standout results as Q1 adjusted EBITDA jumped 17% to $33 million and margins expanded by 320 basis points. The unit collected 53 million gallons of waste oil while growing sales of higher‑margin direct lubricants and Group III products, supporting a 2026 EBITDA midpoint assumption of about $165 million, roughly 20% above 2025 levels.

Strong Balance Sheet and Shareholder Returns

The company ended the quarter with roughly $670 million in cash and short‑term securities and net debt of about 2 times EBITDA at an average interest cost near 5.2%. Clean Harbors repurchased around 87,000 shares for $25 million in Q1, has roughly $575 million remaining under its buyback authorization and closed the DCI acquisition, highlighting ongoing capital deployment flexibility.

PFAS Capability and Growing Pipeline

Clean Harbors highlighted an end‑to‑end PFAS management framework and noted that regulatory guidance now formally supports key disposal methods, strengthening its commercial position. The company cited more than $120 million in PFAS‑related revenue in 2025 and sees its PFAS pipeline accelerating with initial growth trends in the roughly 25% to 35% range.

Operational Capacity Gains and Strategic Investments

The Kimball incinerator ramp‑up has exceeded 2025 tonnage targets and is running ahead of expectations, which should deliver incremental EBITDA as utilization holds in the mid‑ to upper‑80% range for the year. Clean Harbors opened 18 field service branches in 2025, plans 10 more in 2026 and is investing in a solvent de‑asphalting unit and fleet upgrades to support future growth.

Technology and AI Adoption

Management underscored growing use of AI and automation across waste classification, invoice auditing, billing readiness, document processing and routing. These tools are expected to boost productivity, enhance compliance and safety, and improve financial performance over time as more workflows are digitized and optimized.

Weather‑Related Disruption in Q1

Challenging weather conditions in February disrupted collection and service activities, creating a choppy monthly pattern despite the quarter’s positive finish. The company reported that March rebounded strongly, helping Environmental Services log double‑digit revenue growth for the month and partially offsetting earlier weather‑driven weakness.

Industrial Services Softness and Turnaround Uncertainty

Industrial Services remained a soft spot, with regional weakness and shorter, “pit‑stop” style refinery turnarounds limiting project duration and revenue visibility. Management is taking a cautious stance and currently expects Industrial Services to be roughly flat year over year, highlighting a potential drag relative to other faster‑growing segments.

Seasonal Q1 Cash Flow Weakness

Operating cash flow was just $6 million in Q1 and adjusted free cash flow was negative $76 million, reflecting typical seasonal patterns for the business. Management framed the weak early‑year cash generation as normal, pointing investors instead to full‑year free cash flow expectations backed by higher EBITDA and disciplined capital allocation.

Rising SG&A and Corporate Costs

Selling, general and administrative expenses increased to 14.2% of revenue in Q1, driven mainly by higher incentive compensation and insurance costs. The Corporate segment’s negative adjusted EBITDA is expected to grow 3% to 6% as the company absorbs wage, benefit, insurance and acquisition‑related expenses, though corporate costs should remain flat to slightly down as a percentage of revenue.

Dependence on Base Oil Price Dynamics

SKSS’s recent outperformance was helped by a late‑quarter surge in base oil prices, which widened spreads and lifted profitability. Management acknowledged meaningful uncertainty around how long elevated base oil prices will last due to geopolitical factors, noting that a reversion in spreads could pressure SKSS earnings versus current expectations.

Higher Capital Spend and Raised CapEx Guidance

Net capital expenditures were $97 million in Q1, including about $15 million of strategic outlays, and full‑year 2026 net capex guidance has been raised to $350 million to $410 million. While these investments weigh on near‑term free cash flow, management positions them as critical to expanding capacity, modernizing the fleet and funding high‑return growth projects.

Outlook and Forward‑Looking Guidance

Looking ahead, Clean Harbors now guides 2026 adjusted EBITDA to $1.24 billion to $1.30 billion with Q2 EBITDA expected to grow mid‑single to high‑single digits year over year. The company forecasts full‑year adjusted free cash flow of $490 million to $550 million and maintains expectations for strong ES and SKSS contributions, even as corporate costs tick higher and capital spending rises.

Clean Harbors’ earnings call painted a picture of a company leveraging strong core demand, widening margins and a solid balance sheet to support higher guidance and ongoing shareholder returns. While investors must watch base‑oil volatility, industrial‑services softness and heavier capex, the overarching message was one of durable growth in Environmental Services and SKSS, backed by rising PFAS opportunities and targeted strategic investment.