What is the 13F Pro Quality Score for CLH?

13F Pro ranks CLEAN HARBORS INC (CLH) on the 13F Pro Quality Score, a 0–100 composite of 32 fundamental signals including return on invested capital, free cash flow consistency, balance-sheet strength, earnings quality, growth durability, and valuation discipline. The score refreshes after each 10-K and 10-Q filing on SEC EDGAR. View CLH's current score at https://13fpro.ai/research/CLH (free sign-up required for the full ranking).

Where does 13F Pro source CLH data?

All CLEAN HARBORS INC fundamentals and ownership data come directly from SEC EDGAR. CLEAN HARBORS INC files with the SEC under CIK 822818. 13F Pro ingests XBRL financial facts from 10-K and 10-Q filings, Form 13F-HR institutional holdings, and Form 4 insider transactions, with no third-party rewrites or estimates.

What sector is CLH in?

CLEAN HARBORS INC (CLH) is classified in the Utilities sector. 13F Pro publishes sector-level fund flow analysis and quality leaders at https://13fpro.ai/research/sector/utilities.

How often is CLH research updated on 13F Pro?

CLH's fundamentals refresh within hours of each new 10-K or 10-Q filing on SEC EDGAR. Institutional ownership updates after each quarterly 13F filing window. Insider transactions update after each Form 4 filing. The 13F Pro Quality Score recalculates after every fundamentals refresh.

CLEAN HARBORS INC(CLH)Stock Analysis

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SEC EDGAR: CIK 822818 CLH stock profile & AI dashboard →

13F Pro Quality Score

56.3/100

Rank #1,106 of 2,879 stocksTOP 50%

View Utilities peers →

Rankings refresh quarterly once 80% of peers have filed (~45 days after quarter-end). Next update: ~Aug 14, 2026.

Revenue Growth

50.4/100

Profitability

54.8/100

Balance Sheet

69.4/100

Earnings Quality

43.0/100

Free Cash Flow

40.3/100

Institutional Flow

17.4/100

Revenue Scale

80.7/100

Dilution Risk

73.3/100

CLH Stock Analysis & AI Quality Score

AI stock analysis and institutional research for CLEAN HARBORS INC (CLH), a Utilities sector company. 13F Pro's AI-powered ranking engine scores CLH at 56.3/100 on a 32-signal composite quality model, placing it at rank #1,106 of 2,879 stocks — the top half of the AI-ranked universe. CLH scores in the top quartile across revenue scale (80.7). Areas of concern include institutional flow (17.4), which score below median versus the broader universe. Based on the latest XBRL financial filings (Q1 2026), CLEAN HARBORS INC reports quarterly revenue of $1.5B, net income of $63.2M, an operating margin of 8.2%. Top institutional holders of CLH by reported 13-F value include BlackRock,, WELLINGTON MANAGEMENT GROUP LLP, JANUS HENDERSON GROUP PLC, based on the most recent SEC filings. CLH trades on the NYSE exchange and files with the SEC under CIK 822818. 13F Pro's AI research platform runs 10 specialized AI analysts — value, growth, momentum, macro, and activist specialists — that debate CLH daily and publish AI-generated analysis with cited SEC sources. The platform aggregates historical XBRL financial facts, 10-Q and 10-K filings, insider Form 4 transactions, and institutional 13-F holdings for CLEAN HARBORS INC directly from SEC EDGAR. CLEAN HARBORS INC's 13F Pro composite quality score has ranged between 8 and 74 since 2021, currently 56.3 — an improving long-term trajectory across 56 quarterly and live scoring snapshots.

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Fun facts about CLEAN HARBORS INC

Quirks, history, and lore behind CLH — the kind of stuff that makes a stock memorable.

1
The Basics
U.S. environmental services company · mid-cap · listed on the NYSE · headquartered in Massachusetts.
2
The Numbers
Annual revenue of roughly $6 billion, built on thousands of industrial clients who desperately need someone to deal with their hazardous waste — because nobody else wants to.
3
The History
Founded in 1980 in New England, it grew by acquiring smaller rivals and quietly became North America's largest hazardous-waste management and environmental-services company.
4
The Secret
It doesn't just haul away nasty stuff — it also recycles and re-refines used oil and solvents, turning industrial waste streams into sellable fuel and base oil.
5
The Lore
Its Safety-Kleen subsidiary is the go-to parts-washer and used-oil collector for auto shops across the continent — a brand that predates the parent company's ownership by decades.
6
The Giveaway
When a factory, a Superfund site, or a chemical spill needs cleaning up, this company — whose very name promises a tidy outcome — shows up with the hazmat suits and tanker trucks.

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Revenue

Q1 2026

$1.5B

Net Income

Q1 2026

$63.2M

Free Cash Flow

Q1 2026

$-92.1M

Operating Margin

Q1 2026

8.2%

ROIC

Q1 2026

2.1%

D/E Ratio

Q1 2026

1.00

Revenue & Net Income

Earnings Per Share

Key Financials Over Time

Export Financial Table · Pro+

Revenue

+2.4% YoY

$6.03BFY 2025

FY22 $5.17BFY23 $5.41BFY24 $5.89BFY25 $6.03B

Net Income

-2.8% YoY

$391.0MFY 2025

FY22 $411.7MFY23 $377.9MFY24 $402.3MFY25 $391.0M

Operating Income

+0.5% YoY

$673.4MFY 2025

FY22 $634.7MFY23 $612.4MFY24 $670.2MFY25 $673.4M

EPS (Diluted)

-1.9% YoY

$7.28FY 2025

FY22 $7.56FY23 $6.95FY24 $7.42FY25 $7.28

Total Assets

+3.3% YoY

$7.62BFY 2025

FY22 $6.13BFY23 $6.38BFY24 $7.38BFY25 $7.62B

Total Debt

-0.4% YoY

$2.78BFY 2025

FY22 $2.42BFY23 $2.30BFY24 $2.79BFY25 $2.78B

Op. Cash Flow

+11.4% YoY

$866.7MFY 2025

FY22 $626.2MFY23 $734.6MFY24 $777.8MFY25 $866.7M

Metric	FY 2025	FY 2024	FY 2023	FY 2022	FY 2021	FY 2019
Revenue	$6.03B +2.4%	$5.89B +8.9%	$5.41B +4.7%	$5.17B +35.8%	$3.81B +11.5%	$3.41B
Net Income	$391.0M -2.8%	$402.3M +6.5%	$377.9M -8.2%	$411.7M +102.6%	$203.2M +107.9%	$97.7M
Operating Income	$673.4M +0.5%	$670.2M +9.4%	$612.4M -3.5%	$634.7M +82.5%	$347.9M +51.6%	$229.5M
EPS (Diluted)	$7.28 -1.9%	$7.42 +6.8%	$6.95 -8.1%	$7.56 +103.8%	$3.71 +113.2%	$1.74
Total Assets	$7.62B +3.3%	$7.38B +15.6%	$6.38B +4.1%	$6.13B +8.4%	$5.65B +37.6%	$4.11B
Total Debt	$2.78B -0.4%	$2.79B +21.0%	$2.30B -5.1%	$2.42B -4.3%	$2.53B +62.3%	$1.56B
Operating Cash Flow	$866.7M +11.4%	$777.8M +5.9%	$734.6M +17.3%	$626.2M +14.7%	$546.0M +32.1%	$413.2M

AI Insight: CLH Financial Trends

CLH shows stable year-over-year revenue and earnings but operating cash flow remains extremely volatile quarter-to-quarter, masking underlying consistency.

• Revenue held near flat year-over-year: Q1 2026 at $1,460M vs. Q1 2025 at $1,432M, a modest 2% gain.

• Operating income improved Q4 2025 to $158M vs. Q4 2024 $137M, and Q2 2025 $210M matched Q2 2024 $215M closely.

• Total debt declined steadily from $2,791M in Q2 2024 to $2,774M in Q1 2026, while equity grew from $2,442M to $2,776M.

• Net income in Q1 2026 was $63M, roughly in line with Q1 2025's $59M, suggesting no meaningful earnings deterioration.

⚠ Operating cash flow collapsed to $6M in Q1 2026 vs. $355M in Q4 2025 — extreme seasonality or working capital risk warrants scrutiny.

⚠ Operating margin in Q1 2026 was 8.2% ($119M/$1,460M), below Q2–Q3 peaks near 13–14% — seasonal compression persists.

⚠ Equity growth from $2,442M to $2,776M over six quarters signals gradual balance sheet strengthening worth monitoring for continuation.

AI Insight: CLH Ratio Trends

CLH shows consistent seasonal cyclicality but peak profitability metrics have stepped down year-over-year, with Q2 ROIC slipping from 16.5% in 2024 to 15.3% in 2025.

• ROIC at Q1 2026 stands at 8.6%, nearly matching Q1 2025's 8.3%, confirming deep seasonal troughs but no meaningful recovery.

• Peak-quarter ROIC declined from 16.5% in Q2 2024 to 15.3% in Q2 2025, signaling modest year-over-year erosion at the cycle high.

• Leverage improved steadily: D/E fell from 1.14 in Q2 2024 to 1.00 in Q1 2026, the lowest level in the dataset.

• Operating margin in Q1 2026 is 8.2%, up slightly from Q1 2025's 7.8%, a marginal year-over-year seasonal improvement.

⚠ Peak-quarter OpMargin fell from 13.9% (Q2 2024) to 13.6% (Q2 2025) — monitor whether Q2 2026 continues this step-down trend.

⚠ ROE at Q1 2026 is 9.1%, matching Q1 2025 exactly — no improvement despite lower leverage, suggesting weaker earnings quality.

⚠ D/E at 1.00 is a multi-period low; watch whether debt reduction continues or capital deployment reverses this positive trend.

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Available Research

13F Pro tracks comprehensive data for CLEAN HARBORS INC including:

SEC EDGAR filings (10-K, 10-Q, 8-K)

XBRL financial facts (revenue, EPS, margins)

Insider transactions (Form 4)

Institutional 13F holdings

Quality rankings (32 signals)

AI analyst debates & daily meetings

Historical financial trends

Peer comparison & sector analysis

Top Institutional Holders of CLH

BlackRock, Inc.
$1.4B4,802,492 sh
WELLINGTON MANAGEMENT GROUP LLP
$1.0B3,577,034 sh
JANUS HENDERSON GROUP PLC
$675.4M2,355,394 sh
VANGUARD CAPITAL MANAGEMENT LLC
$622.0M2,169,364 sh
FMR LLC
$602.5M2,101,179 sh
VANGUARD PORTFOLIO MANAGEMENT LLC
$562.8M1,962,951 sh
LONE PINE CAPITAL LLC
$503.2M1,754,950 sh
STATE STREET CORP
$440.8M1,537,297 sh
D1 Capital Partners L.P.
$383.7M1,338,281 sh
Pictet Asset Management Holding SA
$356.1M1,242,142 sh

Fund	Value	Shares
BlackRock, Inc.	$1.4B	4,802,492
WELLINGTON MANAGEMENT GROUP LLP	$1.0B	3,577,034
JANUS HENDERSON GROUP PLC	$675.4M	2,355,394
VANGUARD CAPITAL MANAGEMENT LLC	$622.0M	2,169,364
FMR LLC	$602.5M	2,101,179
VANGUARD PORTFOLIO MANAGEMENT LLC	$562.8M	1,962,951
LONE PINE CAPITAL LLC	$503.2M	1,754,950
STATE STREET CORP	$440.8M	1,537,297
D1 Capital Partners L.P.	$383.7M	1,338,281
Pictet Asset Management Holding SA	$356.1M	1,242,142

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Is CLH a good stock to buy?

13F Pro's AI-powered analysis of CLEAN HARBORS INC (CLH) draws on SEC EDGAR-sourced fundamentals, institutional 13F holdings, and insider Form 4 transactions in the Utilities sector (listed on NYSE). The 32-signal AI Quality Score, current rank, and full bull/bear verdict for CLH are available on the CLH stock profile dashboard — with the same data, AI insights, ratios, and institutional activity refreshed after every 10-K, 10-Q, 13F, and Form 4 filing.

Which hedge funds own CLH?

Institutional investors are required to disclose their holdings quarterly via SEC Form 13F. 13F Pro aggregates these filings to show which hedge funds, mutual funds, and asset managers are buying or selling CLH. Combined with insider transaction data from Form 4 filings and AI-powered analysis from 10 specialized research agents, 13F Pro provides a comprehensive view of CLEAN HARBORS INC's investment landscape.