[Form 4] Clean Harbors, Inc Insider Trading Activity

Rhea-AI Filing Summary

Clean Harbors, Inc. (CLH) filed a Form 4 on 07/03/2025 for EVP/CIO Sharon M. Gabriel. On 07/01/2025 the executive had 525 common shares withheld at $229.55 per share under transaction code F, which represents shares automatically surrendered to satisfy tax obligations upon the vesting of equity awards (Rule 16b-3). Following the withholding, Gabriel directly owns 27,766 CLH shares. No open-market trades or derivative transactions were reported, indicating the event is a routine administrative adjustment rather than a discretionary sale.

Positive

• Executive retains 27,766 shares, indicating continued equity alignment with shareholders despite the withholding transaction.

Negative

• 525 shares were removed from direct ownership, a slight decrease, although motivated solely by tax obligations.

Insights

Financial Analyst

TL;DR: Routine tax-withholding; minimal signaling effect, neutral for valuation.

The F-code denotes shares withheld to cover taxes, not an elective sale; therefore, it carries little informational content about management’s view of Clean Harbors’ prospects. The 525-share reduction equals ~1.9% of Gabriel’s direct stake and is immaterial versus the company’s ~54 million shares outstanding. Insider retains a meaningful 27,766-share position, maintaining alignment with shareholders. Overall impact on supply-demand dynamics and sentiment is negligible.

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^*

Gabriel Sharon M.

(Last) (First) (Middle)

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/CIO (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		525(1)	D	$229.55	27,766	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/ Sharon M. Gabriel	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 did Clean Harbors (CLH) report in the latest Form 4?

EVP/CIO Sharon M. Gabriel had 525 shares withheld at $229.55 on 07/01/2025 to pay taxes on vested equity.

Was the CLH insider transaction an open-market sale?

No. Code F indicates automatic tax withholding, not a discretionary market sale.

How many CLH shares does the executive now hold?

After the transaction, Gabriel directly owns 27,766 shares.

Does this Form 4 signal bullish or bearish sentiment?

The filing is neutral; it reflects administrative tax withholding, so it offers little insight into management’s outlook.

Were any derivative securities involved in the filing?

No derivative transactions were reported in Table II of the Form 4.