CLEAN HARBORS CFO reports tax-withholding share disposition

CLEAN HARBORS INC Executive Vice President and Chief Financial Officer Eric J. Dugas reported a small share disposition tied to taxes, not a market trade.

Rhea-AI Filing Summary

CLEAN HARBORS INC Executive Vice President and Chief Financial Officer Eric J. Dugas reported a small share disposition tied to taxes, not a market trade. On this Form 4, 447 shares of common stock were withheld at $290.74 per share to cover tax liability upon vesting, in accordance with Rule 16b3.

After this tax-withholding transaction, Dugas directly holds 13,532 shares of CLEAN HARBORS INC common stock. The filing reflects a routine compensation-related event rather than an open-market purchase or sale.

Insider Trade Summary

Exercise Price or Tax Liability: 447 shares

Exercise Price or Tax Liability 1 txn

Insider Dugas Eric J.

Role EVP CHIEF FINANCIAL OFFICER

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	447	$290.74	$130K

Holdings After Transaction: Common Stock — 13,532 shares (Direct)

Footnotes (1)

1. F1. Payment of tax liability by withholding of securities incident to vesting of securities in accordance with Rule 16b3

Key Figures

Shares withheld for taxes: 447 shares Withholding price: $290.74 per share Shares held after transaction: 13,532 shares +1 more

4 metrics

Shares withheld for taxes 447 shares Tax-withholding disposition on common stock

Withholding price $290.74 per share Valuation for tax-withholding transaction

Shares held after transaction 13,532 shares Direct holdings after July 1, 2026 event

Tax-withholding transactions 1 event Count of F-code tax-withholding entries in this filing

Key Terms

Rule 16b3, tax liability, withholding of securities, tax-withholding disposition

4 terms

Rule 16b3 regulatory

"in accordance with Rule 16b3"

tax liability financial

"Payment of tax liability by withholding of securities incident to vesting"

withholding of securities financial

"Payment of tax liability by withholding of securities incident to vesting"

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did CLEAN HARBORS INC (CLH) report for Eric J. Dugas?

CLEAN HARBORS INC reported that CFO Eric J. Dugas had 447 common shares withheld to pay tax liabilities upon vesting. This was a compensation-related tax-withholding event rather than an open-market stock sale or purchase.

Was the CLEAN HARBORS INC (CLH) insider transaction an open-market sale?

No, the transaction was not an open-market sale. The 447 shares were withheld by the company to satisfy tax obligations related to vesting securities under Rule 16b3, a standard administrative process for equity compensation.

At what price were the withheld CLEAN HARBORS INC (CLH) shares valued?

The 447 withheld CLEAN HARBORS INC shares were valued at $290.74 per share. This price is used to determine the value of shares applied toward the executive’s tax liability at the time of the vesting event.

How many CLEAN HARBORS INC (CLH) shares does Eric J. Dugas hold after this filing?

After this tax-withholding transaction, Eric J. Dugas directly holds 13,532 shares of CLEAN HARBORS INC common stock. This remaining position shows he continues to have a meaningful equity stake following the routine compensation-related adjustment.

What does Rule 16b3 mean in the CLEAN HARBORS INC (CLH) Form 4 footnote?

Rule 16b3 allows certain insider transactions, like tax-withholding on equity awards, to be exempt from short-swing profit rules. Here, it clarifies that withholding 447 shares for taxes was a permitted, routine part of equity compensation administration.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 07/06/2026 - 03:07 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Dugas Eric J.

(Last) (First) (Middle)

C/O CLEAN HARBORS, INC.

42 LONGWATER DRIVE

(Street)

NORWELL MASSACHUSETTS 02061

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
CLEAN HARBORS INC [ CLH ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP CHIEF FINANCIAL OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/01/2026		F		447(1)	D	$290.74	13,532	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Payment of tax liability by withholding of securities incident to vesting of securities in accordance with Rule 16b3

	/s/ Eric J. Dugas	07/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)