Clean Harbors EVP reports 1,000-share charitable stock gift

Clean Harbors Inc. executive vice president (CHESI) reported a charitable gift of company stock.

Rhea-AI Filing Summary

Clean Harbors Inc. executive vice president (CHESI) reported a charitable gift of company stock. On 12/09/2025, the officer made a Form 4 filing showing a disposition of 1,000 shares of Clean Harbors common stock coded as a charitable gift, at a reported price of $0. After this transaction, the officer directly beneficially owns 47,664 shares of Clean Harbors common stock.

Insider Trade Summary

1,000 shares gifted

Gift 1 txn

Insider CURTIS GEORGE L

Role EXEC. VICE PRESIDENT (CHESI)

Type	Security	Shares	Price	Value
Gift	Common Stock	1,000	$0.00	$0.00

Holdings After Transaction: Common Stock — 47,664 shares (Direct)

Footnotes (1)

1. F1. Charitable Gift.

FAQ

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

What insider transaction did Clean Harbors (CLH) report in this Form 4?

The Form 4 reports that a Clean Harbors executive vice president disposed of 1,000 shares of common stock on 12/09/2025, identified as a charitable gift.

Who is the reporting person in the Clean Harbors (CLH) Form 4 filing?

The reporting person is an executive vice president (CHESI) of Clean Harbors Inc., filing individually as indicated by the Form 4.

How many Clean Harbors (CLH) shares does the insider own after the transaction?

Following the charitable gift of 1,000 shares, the executive vice president directly beneficially owns 47,664 shares of Clean Harbors common stock.

What was the transaction code used in the Clean Harbors (CLH) Form 4?

The transaction is coded as "G" in Table I, which the explanation of responses states represents a charitable gift.

Was the Clean Harbors (CLH) insider transaction a purchase or a sale?

The Form 4 shows a disposition (D) of 1,000 shares of common stock, categorized specifically as a charitable gift rather than an open-market sale.

Does this Clean Harbors (CLH) Form 4 involve any derivative securities?

Table II for derivative securities is present in the form but contains no reported derivative transactions in the provided content.

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

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Accepted by SEC EDGAR 12/11/2025 - 08:53 AM EST 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^*

CURTIS GEORGE L

(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)
	EXEC. VICE PRESIDENT (CHESI)

3. Date of Earliest Transaction (Month/Day/Year)
12/09/2025

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	12/09/2025		G		1,000(1)	D	$0	47,664	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. Charitable Gift.

	/s/ George L. Curtis	12/11/2025
	** 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.