CLEAN HARBORS INC: management transactions · United States · SEC (Form 4)

About CLEAN HARBORS INC

Clean Harbors Inc. (ticker CLH) is listed on the NYSE in the United States and is one of North America’s leading environmental and industrial services companies. Founded in 1980, the business began as a four-person tank-cleaning operation and has since evolved into a large integrated platform serving hazardous-waste handling, industrial cleaning, remediation, and environmental response needs. The company is headquartered in Norwell, Massachusetts, near Boston. From an equity analyst’s perspective, the investment case is anchored in the breadth and defensiveness of Clean Harbors’ operating model. The company spans multiple steps of the environmental value chain: collection, transportation, treatment, recycling, and disposal of hazardous and non-hazardous waste. It also provides field services, emergency spill response, industrial cleaning, and site remediation. In addition, its Safety-Kleen-related operations add exposure to used oil, lubricant management, and recycling-oriented services. This mix gives the company a more diversified revenue base than a pure waste hauler or a single-service contractor. Clean Harbors describes itself as a leading provider of environmental and industrial services throughout North America, and its competitive position is reinforced by a substantial network of treatment, incineration, landfill, and service facilities. That infrastructure footprint is an important barrier to entry: regulatory permitting is complex, capital requirements are high, and compliance standards are stringent. As a result, the company benefits from structural advantages in a market where environmental regulation and industrial safety requirements support long-term demand. Recent developments remain important for investors. In 2025, management highlighted continued growth in Environmental Services and pointed to support from the integration of 2024 acquisitions, including HEPACO, which strengthened the Field Services platform. Recent company communications also emphasized healthy backlog trends and ongoing efforts to improve margins and reduce volatility in parts of the portfolio. These elements matter because they suggest that growth is being driven not only by cyclical industrial activity, but also by recurring compliance-related demand and by the expanding scale of its service network. Overall, Clean Harbors is best viewed as a specialized environmental infrastructure and industrial services business with a strong North American footprint, meaningful regulatory moats, and exposure to recurring cleanup, remediation, and waste-management demand. For global investors screening NYSE-listed U.S. industrial names, CLH stands out as a high-quality environmental services platform rather than a traditional commodity-linked industrial company.