Clean Harbors Earnings Call Highlights Record Cash, Cautious Outlook

Clean Harbors ((CLH)) has held its Q4 earnings call. Read on for the main highlights of the call.

Clean Harbors’ latest earnings call struck an upbeat tone, balancing record financial and operational results against a cautious view of near‑term headwinds. Management highlighted robust cash generation, margin expansion and a strengthening balance sheet, while acknowledging pressure from softer base‑oil markets, conservative industrial demand assumptions and weather‑driven volatility.

Record Safety Performance Underpins Operations

Clean Harbors reported a total recordable incident rate of 0.49 for 2025, marking its best safety year on record. Executives stressed that this safety performance enhances the company’s reputation with customers and regulators, while also supporting employee retention and keeping insurance and operational costs in check.

All‑Time High Revenue and Earnings Power

Full‑year 2025 revenue surpassed $6 billion for the first time in the company’s history, underscoring demand across its environmental platform. Adjusted EBITDA climbed about 5% to roughly $1.17 billion, and consolidated margins widened by 40 basis points, reflecting disciplined pricing and solid execution in core businesses.

Margin Expansion and Strong Q4 Segment Momentum

Fourth‑quarter revenue rose 5% to $1.5 billion, with adjusted EBITDA up 8% to $279 million and an 18.6% margin, 60 basis points higher year‑over‑year. Environmental Services led the way as revenue in that segment grew 6%, including 8% growth in Technical Services, 7% in Safety‑Kleen Environmental and 13% in Field Services, driving an 8% Q4 EBITDA increase and about 50 basis points of margin expansion.

Record Cash Generation and Deleveraging

The company delivered record annual adjusted free cash flow of $509 million, equal to roughly 44% of 2025 adjusted EBITDA. Fourth‑quarter operating cash flow grew 17% to $355 million, while Q4 adjusted free cash flow reached $261 million, helping push net leverage down to about 1.8 times EBITDA, the lowest in nearly 15 years, with cash and securities exceeding $950 million.

Share Repurchases and Capital Allocation Discipline

Clean Harbors continued to return cash to shareholders, repurchasing about $133 million of stock in Q4, or nearly 600,000 shares, and roughly $250 million over the full year, more than 1.1 million shares. The board expanded the buyback authorization by $350 million, leaving about $600 million of remaining capacity and signaling confidence in the company’s valuation and future cash flows.

Strategic M&A and Targeted Organic Investment

Management announced an agreement to acquire DCI’s environmental businesses for about $130 million, expecting roughly $40 million of revenue and $11 million of adjusted EBITDA at full run‑rate. The company also committed $50 million to expand its vacuum truck fleet, an organic move expected to generate $12 million to $14 million of incremental EBITDA by 2028 as utilization ramps.

PFAS Capabilities Position Long‑Term Growth

Per‑ and polyfluoroalkyl substances, or PFAS, were a key growth theme as the firm highlighted its role in an EPA incineration study, participation in a Senate hearing and a three‑year, $110 million contract at Pearl Harbor. Management is baking in about 20% PFAS business growth for 2026 but noted that future upside could accelerate as EPA, defense and other regulatory frameworks mature.

Improving SKSS Performance Amid Base‑Oil Pressure

The Safety‑Kleen Sustainability Solutions segment posted Q4 adjusted EBITDA of $30 million, up 22% year‑over‑year, and full‑year EBITDA of $137 million despite a weaker base‑oil pricing backdrop. The company lifted charge‑for‑oil pricing roughly 50% versus Q3, collected about 56 million gallons of waste oil and continued to scale higher‑value Group III production by roughly 4 million to 6 million gallons with an approximate $1 per gallon premium.

Operational Milestones and Network Strength

Management pointed to several operational highlights, including a successful first‑year ramp of the Kimball incinerator and the creation of a Phoenix hub that enhances network density and logistics efficiency. The company handled nearly 22,000 emergency response events and cut voluntary turnover by 150 basis points to a five‑year low, underpinning service reliability and labor stability.

Industrial and Base‑Oil Headwinds Temper Near‑Term Outlook

Despite the strong year, Clean Harbors flagged ongoing weakness in certain industrial verticals and soft base‑oil markets as key near‑term headwinds. Industrial Services is guided to a modest, largely flat 2026, while base‑oil prices are assumed to decline slightly, leaving SKSS EBITDA expected to hold around $135 million, roughly in line with 2025, even as management deploys pricing and mix levers.

Weather Volatility and Rising Corporate Costs

Winter storms early in 2026 created project delays and management expects weather to remain a periodic earnings swing factor, with Q1 EBITDA as a share of the full year guided below historical levels. Corporate costs are also trending higher, with SG&A at 12.9% of Q4 revenue and corporate negative EBITDA projected to rise 2% to 4% in 2026 due to growth investments, wage and benefit increases and insurance inflation.

M&A Execution and Regulatory Dependencies

While the deal pipeline remains active, not all transactions have closed, and the 2026 guidance includes only about $5 million to $6 million of EBITDA contribution from the DCI transaction due to timing uncertainty. Management also cautioned that PFAS upside and some partnership opportunities, such as the Castrol relationship, depend heavily on regulatory progress and long sales cycles, which could delay the realization of full economic benefits.

Guidance and 2026 Outlook

For 2026, Clean Harbors guided adjusted EBITDA to a range of $1.20 billion to $1.26 billion, implying roughly 5% growth at the midpoint, with Environmental Services expected to grow just over 5% and Q1 ES EBITDA up 4% to 7% year‑over‑year. Adjusted free cash flow is forecast at $480 million to $540 million, converting about 41% of EBITDA, while net capital spending, excluding specific strategic projects, is targeted at $340 million to $400 million and the company retains $600 million of buyback capacity.

Clean Harbors’ earnings call painted a picture of a company leveraging scale, safety and regulatory tailwinds to deliver record results while remaining realistic about cyclical and external risks. For investors, the story is one of steady mid‑single‑digit EBITDA growth, strong cash generation and disciplined capital deployment, with PFAS, M&A and fleet investments offering optionality for longer‑term upside.