Clean Harbors (CLH) CFO reports tax-share withholding and new stock awards

Rhea-AI Filing Summary

Clean Harbors EVP and CFO Eric J. Dugas reported several equity-related transactions in company common stock. On 02/02/2026, 567 shares were withheld at $259.91 per share to cover tax obligations tied to vesting under Rule 16b-3.

On 02/01/2026, he received a performance-based restricted stock award of 3,066 shares, vesting 50% on 3/15/2028 and 50% on 3/15/2029, subject to performance goals for the 1/1/2027–12/31/2027 period. He also received a time-based restricted stock award of 1,022 shares, vesting in four equal annual installments from February 1, 2027 through February 1, 2030. Following these transactions, he directly owned 22,809 shares of Clean Harbors common stock.

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

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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 MA 02061

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
02/01/2026

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

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

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

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	02/02/2026		F		567(1)	D	$259.91	18,721	D
Common Stock	02/01/2026		A		3,066(2)	A	$0	21,787	D
Common Stock	02/01/2026		A		1,022(3)	A	$0	22,809	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.

2. Performance-Based Restricted Stock Award that will vest 50% on 3/15/2028 and 50% on 3/15/2029, depending on achievement of certain goals during the performance period 1/1/2027 through 12/31/2027

3. Restricted Stock Award vesting as to 25% on February 1, 2027; 25% on February 1, 2028; 25% on February 1, 2029; and 25% on February 1, 2030.

	/s/ Eric J. Dugas	02/03/2026
	** 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).
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FAQ

What insider transactions did Clean Harbors (CLH) CFO Eric Dugas report?

Eric Dugas reported tax-share withholding and new stock awards. He had 567 shares withheld at $259.91 for tax on vesting, received 3,066 performance-based restricted shares, and 1,022 time-based restricted shares, ending with 22,809 directly owned Clean Harbors common shares.

How many Clean Harbors shares did the CFO have withheld for taxes?

The CFO had 567 Clean Harbors shares withheld for taxes. On 02/02/2026, 567 common shares were withheld at $259.91 each to satisfy tax obligations related to vesting, in accordance with Rule 16b-3, rather than being sold in an open-market discretionary transaction.

What are the terms of the 3,066-share performance-based award at CLH?

The 3,066-share award vests based on 2027 performance. It will vest 50% on March 15, 2028 and 50% on March 15, 2029, depending on achieving specified goals during the January 1, 2027 through December 31, 2027 performance period for Clean Harbors.

How does the 1,022-share restricted stock award for CLH’s CFO vest?

The 1,022-share restricted award vests in four equal parts. It vests 25% on February 1 of 2027, 2028, 2029, and 2030. This structure ties the CFO’s compensation to continued service and long-term alignment with Clean Harbors shareholders.

How many Clean Harbors shares does the CFO own after these Form 4 transactions?

After these transactions, the CFO directly owns 22,809 shares. The reported sequence of tax withholding and new restricted stock grants ended with Eric Dugas holding 22,809 shares of Clean Harbors common stock in direct ownership form.

Are the new Clean Harbors stock awards to the CFO performance-based or time-based?

The CFO received both performance-based and time-based awards. One grant is a 3,066-share performance-based restricted award tied to 2027 goals, while another grant is a 1,022-share restricted award that vests in equal annual installments from 2027 through 2030.