Who are Clean Harbors, Inc.'s major customers?

Clean Harbors, Inc. (CLH) key customers include: SAFETY-KLEEN-ENVIRONMENTAL-SERVICES, TERRA-NOVA-SOLUTIONS, McKesson Corporation, McKesson Corporation, Waste Management, Inc. and 4 more. View the full customer network at chainsifter.com/chain/CLH.

What sector is Clean Harbors, Inc. in?

Clean Harbors, Inc. (CLH) operates in the general sector. ChainSifter tracks its verified supply chain relationships including suppliers, customers, and strategic partners.

Clean Harbors, Inc. (CLH): 10 Verified Supply Chain Relationships

0Suppliers

9Customers

1Debt Items

20Related Chains

Source-Backed Evidence Depth

Clean Harbors, Inc. (CLH) is shown with relationship data already present in ChainSifter's database. Counts below come from stored supply-chain records and filing/source URLs where available; missing source URLs are not filled in or estimated.

11Total relationships

2Distinct source URLs

4High confidence

0.762Average confidence

2026-10-29Latest database update

ChainSifter does not infer unreported suppliers, customers, ownership, acquisitions, debt exposure, revenue dependency, or future supply-chain events on this public page.

Clean Harbors, Inc. Suppliers

No suppliers on recordClean Harbors, Inc. does not appear to disclose named supplier relationships in its verified regulatory filings, or upstream suppliers have not yet been identified. Our system processes new filings continuously.

Clean Harbors, Inc. Customers

Ticker	Name	Confidence	Evidence
SAFETY-KLEEN-ENVIRONMENTAL-SERVICES	SAFETY-KLEEN-ENVIRONMENTAL-SERVICES	92%	Revenues from providing containerized waste handling and disposal services, parts washer services and vacuum services, referred to collectively as the Safety-Kleen branches’ core service offerings, c…
TERRA-NOVA-SOLUTIONS	TERRA-NOVA-SOLUTIONS	92%	They are a recognized regional leader in waste treatment and processing that brings to us a blue-chip, long-tenured customer base.
MCK	McKesson Corporation	72%	Reciprocal relationship from MCK graph: Reciprocal relationship from CLH graph: Reciprocal relationship from MCK graph: Reciprocal relationship from CLH graph: will for impairment on an annual basis …
MCK	McKesson Corporation	72%	will for impairment on an annual basis as of December 31 or at an interim date when it is more likely than not that events or changes in the business environment (“triggering events”) would reduce th…
WM	Waste Management, Inc.	72%	will for impairment on an annual basis as of December 31 or at an interim date when it is more likely than not that events or changes in the business environment (“triggering events”) would reduce th…
WM	Waste Management, Inc.	72%	Reciprocal relationship from WM graph: Reciprocal relationship from CLH graph: will for impairment on an annual basis as of December 31 or at an interim date when it is more likely than not that even…
ERIC-GERSTENBERG-CO	ERIC-GERSTENBERG-CO	62%	ons with strong return profiles that enhance our core businesses,” said Mike Battles, Co-Chief Executive Officer. “We believe Terra Nova will be an ideal strategic fit to our waste-handling network. …
MASSACHUSETTS-BUSINESS-CORPORATION	MASSACHUSETTS-BUSINESS-CORPORATION	62%	and interpretations; the imposition of trade sanctions or tariffs; fluctuations in interest rates and foreign currency exchange rates; risks relating to our indebtedness and covenants in our debt agr…
MIKE-BATTLES-CO	MIKE-BATTLES-CO	62%	ons with strong return profiles that enhance our core businesses,” said Mike Battles, Co-Chief Executive Officer. “We believe Terra Nova will be an ideal strategic fit to our waste-handling network. …

Clean Harbors, Inc. Debt Obligations

Instrument	Description	Confidence	Evidence
CLH-DEBT	Debt stack $2.8B	90%	Market cache reports total debt of $2.8B.

Clean Harbors, Inc. Acquisitions

No acquisitions on recordNo completed or pending acquisitions found in our database for Clean Harbors, Inc..

Clean Harbors, Inc. Ownership

Holder	Name	Confidence	Evidence
CLH-OWNER-BLACKROCK-INC	BlackRock, Inc.	90%	13F overlay lists BlackRock, Inc. as top holder; 628 tracked holders.

Clean Harbors, Inc. Extended Supply Chain Network

Ticker	Name	Chain Index	Hops	Relationship Types
MU	Micron Technology, Inc.	100.00	2
MCK	McKesson Corporation	100.00	1	['customer']
GRDN	Guardian Pharmacy Services, Inc.	100.00	2
SCLX	Scilex Holding Company	100.00	2
MWYN	Marwynn Holdings, Inc.	100.00	2
LOW	Lowe's Companies, Inc.	100.00	2
EMMA	Emmaus Life Sciences, Inc.	100.00	2
HALO	Halozyme Therapeutics, Inc.	100.00	2
HLN	Haleon plc	100.00	2
GFL	GFL Environmental Inc.	100.00	2
FBGL	FBS Global Limited	100.00	2
CAH	Cardinal Health, Inc.	100.00	2
CVS	CVS Health Corporation	100.00	2
GLNG	Golar LNG Limited	100.00	2
ARDX	Ardelyx, Inc.	100.00	2
HLNCF	Haleon plc	100.00	2
REGN	Regeneron Pharmaceuticals, Inc.	100.00	2
GILD	Gilead Sciences, Inc.	100.00	2
CHRS	Coherus Oncology, Inc.	100.00	2
WM	Waste Management, Inc.	100.00	1	['customer']

Clean Harbors, Inc. Supply Chain