Institutional shares held 49.2 Million
135K calls
215K puts
Total value of holdings $12B
$32.9M calls
$52.2M puts
Market Cap $13.2B
54,103,200 Shares Out.
Institutional ownership 91.02%
# of Institutions 631


Latest Institutional Activity in CLH

Top Purchases

Q3 2025
Vaughan Nelson Investment Management, L.P. Shares Held: 363K ($88.3M)
Q3 2025
Sg Americas Securities, LLC Shares Held: 39.8K ($9.69M)
Q3 2025
Fort Washington Investment Advisors Inc Shares Held: 115K ($27.9M)
Q3 2025
Swedbank Ab Shares Held: 140K ($34.1M)
Q3 2025
Virginia Retirement Systems Et Al Shares Held: 13.1K ($3.18M)

Top Sells

Q3 2025
Voya Investment Management LLC Shares Held: 15.2K ($3.7M)
Q3 2025
Vontobel Holding Ltd. Shares Held: 156K ($37.9M)
Q3 2025
Spirepoint Private Client, LLC Shares Held: 104K ($25.4M)
Q3 2025
Davenport & CO LLC Shares Held: 445K ($108M)
Q3 2025
Oak Thistle LLC Shares Held: 3.73K ($908K)

About CLH

Clean Harbors, Inc. provides environmental and industrial services in North America. The company operates through two segments, Environmental Services and Safety-Kleen Sustainability Solutions. The Environmental Services segment collects, transports, treats, and disposes hazardous and non-hazardous waste, such as resource recovery, physical treatment, fuel blending, incineration, landfill disposal, wastewater treatment, lab chemicals disposal, and explosives management services; and CleanPack services, including collection, identification, categorization, specialized packaging, transportation, and disposal of laboratory chemicals and household hazardous waste. This segment also provides industrial maintenance and specialty industrial services, and utilizes specialty equipment and resources that performs field services. The Safety-Kleen Sustainability Solutions segment offers specially designed parts washers; automotive and industrial cleaning products, such as antifreeze, windshield washer fluid, degreasers, glass and floor cleaners, hand cleaners, absorbents, mats, and spill kits; pickup and transportation services for hazardous and non-hazardous containerized waste for recycling or disposal; and vacuum services to remove solids, residual oily water and sludge, and other fluids from customers oil/water separators, sumps, and collection tanks, as well as remove and collect waste fluids found at metal fabricators, auto maintenance providers, and general manufacturers. This segment also manufactures, formulates, packages, distributes, and markets lubricants; and provides containerized waste, vacuum services, used motor oil collection, and contract blending and packaging services. Clean Harbors, Inc. was incorporated in 1980 and is headquartered in Norwell, Massachusetts.


Insider Transactions at CLH

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
69.8K Shares
From 22 Insiders
Grant, award, or other acquisition 66.8K shares
Open market or private purchase 3.05K shares
Sell / Disposition
299K Shares
From 23 Insiders
Payment of exercise price or tax liability 38.3K shares
Bona fide gift 63.7K shares
Open market or private sale 181K shares
Sale (or disposition) back to the issuer 16.6K shares

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