[Form 4] Clean Harbors, Inc Insider Trading Activity

Rhea-AI Filing Summary

Clean Harbors, Inc. (CLH) – Form 4 insider transaction

Executive Vice President Brian P. Weber reported a Rule 16b-3 transaction on 1 July 2025. The filing shows a Code F disposition, meaning 1,136 common shares were automatically withheld by the company at a price of $229.55 per share to cover taxes due upon vesting of previously granted equity awards. After the withholding, Weber’s direct ownership stands at 53,412 shares. No derivative securities were involved, and no open-market purchases or sales occurred.

This is a routine, non-discretionary tax-payment transaction; it does not signal a change in the executive’s investment stance or the company’s fundamentals.

Insights

Securities Analyst

TL;DR: Routine tax-withholding; minimal impact on CLH.

The Code F entry confirms the shares were surrendered solely to satisfy withholding obligations at vesting, not an elective sale. The number of shares (1,136) equals roughly 2.1% of Weber’s post-transaction holdings and is immaterial relative to Clean Harbors’ ~55 million shares outstanding. Because no open-market trade occurred, the filing offers little insight into management’s market view and should not materially influence valuation or liquidity considerations.

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^*

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)
07/01/2025

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	07/01/2025		F		1,136(1)	D	$229.55	53,412	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/ Brian P. Weber	07/03/2025
	** 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.

FAQ

What type of insider transaction did CLH report on July 1, 2025?

A Code F share withholding for tax payment tied to equity vesting, not an open-market sale.

How many Clean Harbors shares were withheld from EVP Brian P. Weber?

1,136 common shares were surrendered to cover taxes.

What is Brian P. Weber’s ownership in CLH after the transaction?

He directly owns 53,412 shares of Clean Harbors common stock.

Did the filing include any derivative security activity?

No, Table II shows no derivative securities were acquired or disposed.

Is this Form 4 filing considered material to investors?

It is generally viewed as non-material because it is a mandatory tax-withholding event rather than a discretionary trade.