Clean Harbors (NYSE: CLH) director discloses charitable gift and 10,987 shares held

Rhea-AI Filing Summary

Clean Harbors Inc. director reports charitable stock gift. A company director reported a transaction dated 12/17/2025 involving common stock of Clean Harbors Inc. The filing shows a charitable gift of 415 shares, coded as a gift transaction, at a reported price of $0 per share. After this transfer, the director directly beneficially owns 10,987 shares of Clean Harbors common stock. The transaction is reported as being filed by one reporting person and reflects a personal transfer rather than a market sale.

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^*

Welch John R.

(Last) (First) (Middle)

975 MEMORIAL DRIVE

APT 611

(Street)

CAMBRIDGE MA 02138

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/17/2025

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	12/17/2025		G		415(1)	D	$0	10,987	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/ John R. Welch	12/29/2025
	** 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) disclose in this Form 4 filing?

The filing reports that a director of Clean Harbors Inc. made a charitable gift of 415 shares of the company’s common stock on 12/17/2025, and updated their remaining holdings.

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

The reporting person is a director of Clean Harbors Inc., identified in the signature block as John R. Welch.

How many Clean Harbors (CLH) shares were transferred in the reported transaction?

The Form 4 shows that 415 shares of Clean Harbors Inc. common stock were transferred in a single transaction.

What type of transaction is reported for the Clean Harbors (CLH) director?

The transaction is coded as G in the form’s transaction code column, and the explanation states it was a charitable gift of common stock.

How many Clean Harbors (CLH) shares does the director own after the gift?

Following the reported charitable gift, the director beneficially owns 10,987 shares of Clean Harbors Inc. common stock, held directly.

Was this Clean Harbors (CLH) transaction a market sale for cash?

No. The filing describes the transaction as a charitable gift of 415 shares at a reported price of $0 per share, rather than a market sale.