Clean Harbors Beat Everything Except the 2027 Question

A $120 million warehouse fire and record base-oil spreads produced the best quarter in the company's history — and the bridge to next year is still a shrug.

CLH · Earnings Call · 2026-10-28

An almost implausible quarter

Clean Harbors did not just beat guidance in Q3 2026; it lapped it. Revenue rose 21% to $1.87 billion, adjusted EBITDA 42% to $456 million, and the consolidated margin hit 24.4% — a company record, up 370 basis points year over year. Cash from operations was a record $419 million, and adjusted free cash flow excluding strategic projects was $323 million. EPS of $3.93, up 75% in net income terms. “Our consolidated adjusted EBITDA margin reached 24.4%, the highest quarterly margin in our company's history and 370 basis point improvement over the prior year.” — Eric Dugas, EVP and Chief Financial Officer · 2026-10-28 But the composition is the story. Two engines did the heavy lifting, and neither is a compounding annuity. The first was a single large emergency response event — a food distribution warehouse in Los Angeles that burned down half its footprint: “there was a large warehouse, a food transfer and distribution warehouse out in the L.A. area that had quite an extensive fire burned down half of the building” — Eric Gerstenberg, Co-Chief Executive Officer · 2026-10-28 That job generated roughly $120 million of revenue within the quarter. The second was the re-refining spread: SKSS revenue up 46%, segment adjusted EBITDA more than tripled to $126 million, the highest in segment history, on tight global base oil and lubricant supply. When an analyst asked CFO Eric Dugas to bridge the $80 million guidance raise, the answer was refreshingly blunt: the Q3 beat was about $30 million, and “half of that, maybe a little more than half of that was probably the large ER.” — Eric Dugas, EVP and Chief Financial Officer · 2026-10-28 The rest of the raise is acquisitions and better volumes. So of the $80 million, a meaningful slice is a warehouse fire that will not repeat — and guidance explicitly assumes no large-scale events in Q4, against a Q4 2025 that had them.

The hole in the bridge

Here is the arithmetic that matters. Full-year adjusted EBITDA guidance of $1.44–1.48 billion implies roughly $290 million of growth, or ~25%, over fiscal 2025 — call it ~$1.17 billion. Of the 2026 total, the SKSS segment is guided to about $340 million. Four quarters ago, on the October 2025 call, the same management team put a floor under that business: “We feel the $140 million is the new low watermark, we grow from there.” — Eric Dugas, EVP and Chief Financial Officer · 2025-10-29 So SKSS alone accounts for roughly $200 million of a $290 million increase. That is a commodity spread, not a franchise step-change — even with the genuine structural work underneath it (more Group III gallons, more blended direct volume at 12% of gallons versus 9%, and the SDA unit coming in 2028). Strip SKSS's windfall out and Environmental Services is growing EBITDA roughly 9–11%, which is good, not transformative. Which is why the two most interesting moments on the call were both refusals. Asked twice — once gently, once less so — for a 2027 SKSS floor, management deferred to the February guide:

it is difficult because it is such a commodity-based business, and we are a price taker in many areas. And so as oil prices come down, it may be difficult for us to kind of project what the profitability is.
Michael Battles, Co-Chief Executive Officer · 2026-10-28

The keyword record tells the same story in reverse. Base oil price flipped from one of the company's biggest momentum gainers to a decliner this quarter, and language about the duration of current market conditions cooled with it. Management is loudly celebrating the spread while quietly hedging the durability of it.

Something stopped being said

Last quarter, data centers was the single highest-momentum keyword in Clean Harbors' own transcript. This quarter it does not crack the top thirty, despite the company increasing its commitment — dedicated data center capital raised to $70 million overall and $15 million this year, from $10 million, with roughly a dozen projects in the pipeline: “there's about 12 active projects that we see us getting nestled with a footprint in.” — Eric Gerstenberg, Co-Chief Executive Officer · 2026-10-28 That is a real divergence. The AI data center trade has been de-rating in the tape: over the last 90 days the theme's basket shows six advancers against fifty decliners, roughly -5% on average, even though it is up more than 50% over a year. Clean Harbors is accelerating capex into a narrative the market has temporarily stopped paying for — and the stock, at ~$313, sits 4% off its July all-time high with an +8% ninety-day return. The equity has not been rewarded for the story; it has been rewarded for the spread. What did come back is the operational plumbing: the hub strategy (a $55 million Los Angeles site consolidating six legacy branches and five business units, worth $5–7 million of lease savings alone), captive incinerators (one or two more expected offline over two to three years), and a 20% jump in deferred revenue — the cleanest available proxy for waste volumes actually entering the network. PFAS keeps compounding quietly at roughly 30% growth, and the single service provider consolidation trend, born of reshoring, now has a ten-year, $600 million contract ramping from ~$10 million in Q4 to $25–35 million in 2027.

Margins, capital, and a quiet handoff

The ES margin of 27.4% marked an eighteenth consecutive quarter of year-over-year expansion — but it was flattered by emergency response, and Dugas pulled the long-term framing back to the conservative line: 25 to 50 basis points a year, with the 30% aspirational target intact but undated. That 30% number has been company liturgy for years: “we think 30% is certainly kind of in the future for us.” — Michael L. Battles · 2026-02-18 Balance sheet and deployment look disciplined. A $600 million note offering closed October 1 to fund the EnviroServe and ES&H acquisitions, net leverage targeted in the low 2x range at year-end, $25 million of buybacks at an average $306, and roughly $525 million left on the authorization. Through the June quarter, price to operating income had climbed to 21.3x from under 10x in 2022 — the market has already paid for a lot of this. Effective net cash sits near -$2.3 billion, and capital expenditure reached $126 million in the quarter, up 40% year over year. And then the thing that will actually define the next chapter: Mike Battles retires at year-end, Eric Gerstenberg becomes sole CEO on January 1 after 37 years at the company. A co-CEO structure that produced fifteen-plus straight quarters of EBITDA growth hands off into the single hardest question in the business. The departing CEO's own framing of the charge-for-oil discipline is the standard to hold the successor to: “Our goal is to stay at CFO and no matter kind of what happens in the price. Never go back to PFO, that's the plan.” — Michael Battles, Co-Chief Executive Officer · 2026-07-29

The read

Record quarter, record margin, record cash flow, raised guidance — and a stock that has gone sideways since July. The market is not disputing the numbers; it is disputing the persistence of them. Two of the three reported profit engines this quarter were an act of God and a commodity spread, and management declined to underwrite either into 2027. The durable assets remain: a permitted disposal network, a volume proxy in deferred revenue that grew 20%, PFAS at 30% growth with a bipartisan funding tailwind, and a data center option the tape has temporarily abandoned. Watch February's SKSS guide and Q4's comparison against last year's emergency work — those two lines decide whether $1.46 billion was a peak or a platform.