Clean Harbors (CLH) EVP gains restricted stock, withholds shares for taxes

Rhea-AI Filing Summary

Clean Harbors executive Brian P. Weber reported several equity transactions in company stock. On 02/02/2026, 1,394 shares of common stock were withheld at $259.91 per share to cover tax liabilities related to vesting, leaving 52,018 directly owned shares after that transaction.

On 02/01/2026, he received 3,166 performance-based restricted shares and 1,056 time-based restricted shares at no cost. The performance award is scheduled to vest 50% on 3/15/2028 and 50% on 3/15/2029, subject to goals for the 2027 performance period. The time-based award vests in four equal annual installments starting February 1, 2027. Following these grants, Weber directly owns 56,240 common shares.

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

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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^*

Weber Brian P

(Last) (First) (Middle)

27 INDEPENDENCE DRIVE

(Street)

WALPOLE MA 02081

(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 (CHESI)

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		1,394(1)	D	$259.91	52,018	D
Common Stock	02/01/2026		A		3,166(2)	A	$0	55,184	D
Common Stock	02/01/2026		A		1,056(3)	A	$0	56,240	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/ Brian P. Weber	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 stock transactions did Clean Harbors (CLH) EVP Brian Weber report?

Brian P. Weber reported tax-related share withholding and new stock awards. On 02/02/2026, 1,394 shares were withheld to cover taxes, and on 02/01/2026 he received 3,166 performance-based restricted shares and 1,056 time-based restricted shares, all in Clean Harbors common stock.

How many Clean Harbors (CLH) shares does EVP Brian Weber own after these transactions?

After the reported transactions, Brian P. Weber directly owns 56,240 Clean Harbors common shares. This reflects tax withholding of 1,394 shares and the addition of 3,166 performance-based restricted shares plus 1,056 time-based restricted shares granted on February 1, 2026.

What is the purpose of the 1,394 Clean Harbors shares withheld from Brian Weber?

The 1,394 common shares were withheld to pay tax liabilities arising from vesting of prior equity awards. This tax settlement was executed on 02/02/2026 at $259.91 per share, in accordance with Rule 16b-3, rather than being an open-market discretionary sale.

How do Brian Weber’s performance-based restricted stock awards at Clean Harbors vest?

The 3,166 performance-based restricted shares vest 50% on March 15, 2028 and 50% on March 15, 2029. Vesting depends on achieving specified goals during the performance period from January 1, 2027 through December 31, 2027, as detailed in the award’s terms.

What is the vesting schedule for Brian Weber’s time-based restricted stock at Clean Harbors?

The 1,056 time-based restricted shares vest in four equal annual installments. Vesting occurs 25% on February 1, 2027, then 25% on February 1 of 2028, 2029, and 2030, providing a multi-year retention and incentive structure for the executive.

Did Brian Weber pay cash for his new Clean Harbors restricted stock awards?

No, the restricted stock awards were granted at no cash cost per share. Both the 3,166 performance-based restricted shares and the 1,056 time-based restricted shares are shown with a price of $0, reflecting equity compensation rather than a purchase transaction.