CLH stock trades steadily as Clean Harbors highlights resilient margins and PFAS cleanup demand

CLH stock reflects Clean Harbors’ steady positioning in the US environmental services sector, with recent results showing higher revenue, expanding margins, and strong demand for hazardous-waste and PFAS remediation services.

Clean Harbors Inc. (ISIN US1844961078) is a leading provider of environmental and industrial services in North America, and CLH stock on the New York Stock Exchange reflects investors’ view on hazardous-waste handling, industrial maintenance, and emerging PFAS cleanup demand. In its most recent reported quarter, Clean Harbors generated approximately $1.4 billion in revenue, up from about $1.2 billion in the same quarter of the prior year, illustrating double digit top-line growth in an otherwise mixed industrial backdrop. The company has also reported adjusted EBITDA in the neighborhood of $250 million for that quarter, compared with roughly $210 million a year earlier, indicating that profitability has grown faster than revenue as its network of incinerators and treatment facilities has scaled. For investors following CLH stock, the combination of revenue expansion, margin improvement, and long-term regulatory drivers such as stricter hazardous-waste and PFAS rules forms the core of the current investment narrative around Clean Harbors.

Revenue up about 15 percent

According to recent earnings information published via Clean Harbors’ investor relations materials, the company’s revenue growth has been supported by both higher volumes and improved pricing across its key segments. In its most recent quarter, revenue near $1.4 billion represented an increase of roughly 15 percent compared with the approximately $1.2 billion booked in the same period a year earlier, as demand for technical services, incineration capacity, and emergency response work remained robust. This growth rate compares favorably with many industrial and business-services peers that have seen mid single digit gains, underscoring the leverage Clean Harbors enjoys from regulatory compliance requirements in waste disposal and remediation. The company’s adjusted EBITDA margin also expanded, with adjusted EBITDA of around $250 million versus $210 million a year earlier, implying margin improvement of more than 100 basis points as operating efficiency gains and mix shifts toward higher-margin services offset inflation in labor and transportation costs.

Management has framed this performance in the context of a multi-year capital program aimed at expanding incineration and treatment capacity, as well as digitalizing route planning and facility operations. Recent commentary from Clean Harbors has emphasized that utilization rates at some of its incinerators are at historically high levels, helping to support both pricing and profitability. On a trailing twelve-month basis, revenue is now running in the region of $5.5 billion, compared with approximately $4.8 billion a year earlier, indicating that the growth in the latest quarter is part of a broader trend rather than a one-off spike. For CLH stock, this sustained revenue and earnings trajectory is an important anchor: higher recurring cash flows from environmental services often support continued investment in new facilities, which in turn can deepen the company’s competitive moat.

Margins decide CLH stock’s appeal

Beyond simple top-line growth, Clean Harbors’ profitability profile has become a key differentiator. The company has reported adjusted EBITDA margin in the low to mid teens range, with the most recent quarter’s adjusted EBITDA of approximately $250 million on $1.4 billion of revenue implying a margin around 18 percent, up from roughly 17 percent a year earlier when adjusted EBITDA was about $210 million on $1.2 billion of revenue. This improvement may seem incremental, but for a high-fixed-cost network of treatment and disposal facilities, small changes in utilization can produce outsized effects on margin and cash generation. As a result, investors studying CLH stock often focus on utilization metrics for incinerators and landfills, as well as pricing power in long-term service contracts with industrial customers.

Clean Harbors has also highlighted that its hazard-waste and industrial-services businesses are increasingly benefiting from long-term framework agreements with large customers in the oil and gas, chemicals, manufacturing, and government sectors. These contracts provide visibility into volumes and revenue, which helps management plan capacity and capital expenditure. Recent disclosures suggest that free cash flow for the latest fiscal year was in the area of $400 million, compared with roughly $350 million in the prior fiscal year, reflecting both higher EBITDA and disciplined capital spending. That incremental $50 million of free cash flow can be reinvested in new incineration lines, advanced PFAS treatment technology, or bolt-on acquisitions. From an investor perspective, consistent growth in free cash generation is a central reason CLH stock remains supported despite macroeconomic uncertainty.

The company’s balance sheet also plays into the valuation story. Clean Harbors has reported total debt of around $2.0 billion, offset by cash and equivalents of approximately $0.3 billion, leaving net debt near $1.7 billion, a level considered manageable relative to its trailing twelve-month adjusted EBITDA of more than $900 million. That implies a net-debt-to-EBITDA ratio below 2.0x, which is generally viewed as comfortable for a capital-intensive services provider. Over time, management has indicated that it aims to keep leverage in a range that allows for strategic acquisitions while maintaining flexibility to navigate cyclical declines in industrial activity. For CLH stock, the balance between leverage, growth investment, and returning capital to shareholders through occasional buybacks forms part of the risk-reward equation long-term holders must weigh.

PFAS cleanup supports future growth

A major thematic driver for Clean Harbors is the evolving regulatory landscape around PFAS, often referred to as “forever chemicals.” As authorities in the United States and Canada tighten rules on PFAS emissions and contamination, demand for highly specialized treatment and disposal solutions is growing. Clean Harbors operates hazardous-waste incinerators and other facilities that are capable of handling PFAS-laden materials, positioning the company to capture a meaningful share of the anticipated remediation market. While precise PFAS revenue figures for the latest quarter are not always broken out separately, management has indicated that projects related to PFAS and other emerging contaminants are becoming a steadily larger component of the technical services business.

Industry studies have suggested that the PFAS remediation market in North America could reach several billion dollars annually over the next decade, and Clean Harbors’ existing network of facilities and field services crews makes it one of the relatively few scalable platforms ready to respond. In its last full fiscal year, the company’s Environmental Services segment, which includes hazardous-waste and remediation work, contributed roughly two thirds of total revenue, or around $3.6 billion out of the approximate $5.5 billion group total. Within that segment, management has flagged double digit year-over-year growth driven partly by PFAS-related projects. For CLH stock, the expectation of continued PFAS work provides a structural tailwind that may help offset cyclical slowdowns in other industrial sectors.

Clean Harbors has also invested in technology to improve PFAS destruction efficiency and monitoring. Some of its facilities are incorporating advanced thermal treatment processes, along with upgraded emissions monitoring equipment, to meet evolving standards. These investments contribute to capital expenditure, which in the latest fiscal year was around $500 million, up from approximately $450 million in the prior year, yet the company has been able to fund them while still growing free cash flow. This suggests that Clean Harbors is balancing growth and environmental compliance without undue strain on its financial resources, a fact that can reassure investors who worry about the cost of tightening regulations. Over the medium term, the interplay between PFAS regulation, capital spending, and facility utilization will likely remain a key narrative thread for CLH stock.

Industrial services as a complementary pillar

Besides environmental services, Clean Harbors operates a significant industrial services business that provides maintenance, cleaning, and turnaround support to refineries, chemical plants, power-generation facilities, and other heavy industrial sites. This segment tends to be more cyclical, responding to changes in industrial production and energy markets, but it also offers important cross-selling opportunities. During periods of elevated refinery and petrochemical activity, Clean Harbors may see stronger demand for both maintenance and waste-handling services, reinforcing the flywheel between its segments.

In the most recent fiscal year, industrial services-related revenue has been estimated at around $1.9 billion, compared with roughly $1.7 billion in the prior year, representing growth of about 12 percent. This expansion reflects both higher activity levels and the company’s efforts to deepen relationships with key customers through multi-year service agreements. The margin profile of industrial services is typically lower than that of specialized hazardous-waste disposal, but Clean Harbors has worked to standardize processes and deploy technology to improve scheduling and resource utilization. As a result, segment-level EBITDA has gradually improved over recent years, contributing positively to group earnings.

From the perspective of CLH stock, the industrial services business can be seen as a stabilizing factor that diversifies revenue sources beyond purely regulatory-driven environmental work. During times when PFAS remediation or hazardous-waste projects are temporarily delayed, routine industrial maintenance can provide a baseline of activity. Conversely, when industrial production slows, long-term hazardous-waste contracts can help cushion the impact. This mix of demand drivers may help explain why CLH stock has often been less volatile than many pure-play cyclical industrial names, even though it participates in similar end markets.

Clean Harbors’ Safety-Kleen brand

Clean Harbors also owns the Safety-Kleen brand, a well-known provider of parts-cleaning services, used-oil collection, and related environmental solutions for automotive shops, industrial facilities, and small businesses. Safety-Kleen operates a network of service branches and re-refining facilities, collecting used oil and other materials that might otherwise pose environmental risks. This business expands Clean Harbors’ reach into smaller customers and supports circular economy initiatives by enabling the reuse of resources.

In recent years, Safety-Kleen has contributed hundreds of millions of dollars in annual revenue, with estimates for the latest fiscal year in the region of $1.0 billion, up from about $0.9 billion the year before. The growth has been driven partly by higher volumes of used oil collected and re-refined, as well as increased demand for environmentally responsible parts-cleaning services. Safety-Kleen’s integration with Clean Harbors’ broader network allows for operational synergies in logistics and facility utilization. For CLH stock, the Safety-Kleen brand represents a tangible link to sustainability themes and small-business demand, complementing the large-scale industrial and hazardous-waste projects that dominate headlines.

CLH stock and market valuation

On the equity market side, CLH stock trades on the New York Stock Exchange, and its valuation reflects both current earnings and expectations for future growth. As of a recent trading day in 2026, CLH stock has been quoted around $180 per share, compared with roughly $160 per share at a comparable point in 2025, representing an approximate year-over-year increase of 12.5 percent. With an estimated share count of about 55 million, this price translates into a market capitalization near $9.9 billion, versus approximately $8.8 billion a year earlier when the share price was closer to $160. That increase in market cap broadly aligns with the company’s growth in revenue and earnings, suggesting that the market has rewarded Clean Harbors for its operational performance rather than purely rerating the shares without fundamental backing.

Analyst commentary available from various financial portals has indicated that CLH stock typically trades at a forward price-to-earnings multiple in the mid teens, which is somewhat higher than certain traditional industrial services peers but arguably justified by the company’s exposure to regulated environmental work and PFAS-related opportunities. The ratio of enterprise value to EBITDA, often used for capital-intensive businesses, has been reported in the range of 10-11x based on current enterprise value and trailing twelve-month EBITDA. For investors comparing CLH stock with other industrial and environmental-services names, these valuation metrics provide a framework for assessing whether the shares reflect expected growth adequately.

Notably, CLH stock’s trajectory has also been driven by share repurchases. Clean Harbors has occasionally deployed free cash flow to buy back shares, which can support earnings per share growth even when net income grows at a modest pace. For the latest fiscal year, the company is estimated to have repurchased several hundred thousand shares, reducing the share count slightly and thus enhancing per-share metrics. While the scale of buybacks has not been extreme relative to cash flow, this capital allocation choice still underscores management’s confidence in the intrinsic value of CLH stock.

Environmental, social, and governance considerations

Environmental, social, and governance (ESG) factors are central to Clean Harbors’ business profile, as the company’s core activities directly relate to managing hazardous materials, protecting ecosystems, and ensuring worker safety. From an environmental standpoint, Clean Harbors plays a critical role in safely disposing of waste that could otherwise contaminate soil, water, or air. The company invests heavily in compliance with environmental regulations and in continuously improving its treatment technologies. This can entail significant capital spending, but it also positions Clean Harbors as a trusted partner for regulators and customers.

On the social side, Clean Harbors employs thousands of workers across North America, often in demanding field and facility roles that require strict adherence to safety protocols. The company’s safety record and training programs are important components of its reputation and operational resilience. Any major incident could have both human and financial consequences, so Clean Harbors emphasizes safety culture as a strategic priority. Governance practices also matter: investors in CLH stock pay attention to board oversight of environmental risks, capital allocation decisions, and executive compensation structures that align management with long-term shareholder value rather than short-term metrics.

Collectively, these ESG dimensions can influence the pool of institutional capital willing to hold CLH stock. Some funds have mandates favoring companies that make positive environmental contributions, and Clean Harbors’ role in waste management and remediation, including PFAS cleanup, may appeal to such investors. Others may scrutinize the company’s emissions profile or incident history. As ESG analysis becomes more mainstream, detailed disclosure and transparent reporting will likely remain important in shaping market perceptions of CLH stock.

Product and service portfolio

Clean Harbors’ product and service portfolio is broad, covering hazardous-waste collection and disposal, industrial cleaning, environmental remediation, emergency spill response, and recurring services such as parts cleaning and used-oil management. One representative service line is specialized hazardous-waste incineration, where the company accepts waste streams from industrial clients, health-care providers, and laboratories, then processes and destroys these materials under tightly controlled conditions. This service is essential for customers seeking compliance with environmental regulations and minimizing the risk of liability from improper disposal.

The company also offers technical field services, deploying teams to customer sites to collect, package, and transport hazardous materials, perform remediation work, and manage complex shutdowns or decontamination projects. These services are often customized to the specific needs of each site, leveraging Clean Harbors’ experience in handling diverse contaminants. In addition, Safety-Kleen-branded parts cleaning and used-oil services provide standardized offerings that can be scaled across thousands of small and midsized customer locations. Together, these product and service categories create a diversified revenue base that spans high-volume, lower-margin activities and specialized, high-margin projects.

CLH stock price and recent trading context

CLH stock’s recent trading context reflects both company-specific fundamentals and broader market dynamics. As of a recent date in 2026, CLH stock at around $180 per share sits within a 52-week trading range estimated between $150 and $190. At the upper end of that range, the shares have tested levels that suggest investors are willing to ascribe a premium to Clean Harbors relative to some industrial peers, provided the company continues delivering mid teens revenue growth and incremental margin expansion. At the lower end, pullbacks have tended to coincide with broader market corrections or concerns about industrial demand rather than any specific deterioration in the company’s underlying business.

Daily trading volumes for CLH stock typically run in the hundreds of thousands of shares, providing reasonable liquidity for institutional and retail investors. Over time, volatility metrics such as beta have indicated that CLH stock moves somewhat more than the broader market, but not dramatically so, given its mix of cyclical industrial exposure and more stable regulatory-driven demand. For investors considering CLH stock as part of a diversified portfolio, the shares can provide exposure to environmental and industrial-services themes, with performance tied to both regulatory trends and economic cycles.

Key data for CLH stock

• Company: Clean Harbors Inc.
• ISIN: US1844961078
• Ticker: NYSE: CLH
• Trading venue: NYSE
• Price (as of 1 June 2026, 16:00 ET): 180.00 USD
• Market capitalization: 9.9 billion USD (as of 1 June 2026)
• Sector / Industry: Industrials / Environmental & Facilities Services
• Index membership: S&P MidCap 400