Clean Harbors (CLH) co-CEO disposes 3,314 shares for taxes and forfeiture

Rhea-AI Filing Summary

Clean Harbors Inc. co-CEO Michael Louis Battles reported routine share disposals tied to compensation, not open-market trading. On 2026-03-13, 1,148 shares of Common Stock were withheld at $288.93 per share to cover tax liabilities upon vesting. On the same date, 2,166 restricted shares were returned to the company after performance targets under its Long Term Equity Incentive Program were not achieved. Following these dispositions, Battles directly holds 95,387 Common Stock shares, which the filing notes includes 15 shares acquired through the Clean Harbors Employee Stock Purchase Plan.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Battles Michael Louis

Role CO-CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	1,148	$288.93	$332K
Disposition	Common Stock	2,166	$0.00	--

Holdings After Transaction: Common Stock — 97,538 shares (Direct)

Footnotes (1)

1. Payment of tax liability by withholding of securities incident to vesting of securities in accordance with Rule 16b3. Shares of restricted stock forfeited due to the Company not achieving performance targets under its Long Term Equity Incentive Program. Includes 15 shares acquired under the Clean Harbors Employee Stock Purchase Plan.

Form 4 Insider Transactions: What Each Field Means →

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
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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^*

Battles Michael Louis

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/13/2026

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	03/13/2026		F		1,148(1)	D	$288.93	97,538	D
Common Stock	03/13/2026		D		2,166(2)	D	$0	95,387(3)	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. Shares of restricted stock forfeited due to the Company not achieving performance targets under its Long Term Equity Incentive Program.

3. Includes 15 shares acquired under the Clean Harbors Employee Stock Purchase Plan.

	/s/ Michael Battles	03/17/2026
	** 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).
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 insider transactions did Clean Harbors (CLH) co-CEO Michael Battles report?

Michael Battles reported two non-market dispositions of Common Stock. 1,148 shares were withheld to cover tax liabilities at vesting, and 2,166 restricted shares were forfeited back to the company after performance goals under a long-term incentive plan were not achieved.

Did Clean Harbors (CLH) co-CEO sell shares in the open market in this Form 4?

No, the Form 4 shows no open-market sales. The 1,148-share transaction was tax-withholding upon vesting, and the 2,166-share transaction was a forfeiture back to the issuer due to missed performance targets, both classified as non-derivative dispositions.

How many Clean Harbors (CLH) shares does co-CEO Michael Battles hold after these transactions?

After these transactions, Michael Battles directly holds 95,387 shares of Clean Harbors Common Stock. The filing specifies that this total includes 15 shares acquired through the Clean Harbors Employee Stock Purchase Plan, giving context to his remaining equity position.

What does the 1,148-share tax-withholding transaction mean for Clean Harbors (CLH)?

The 1,148-share transaction reflects shares withheld at $288.93 per share to pay tax liabilities when equity awards vested. This is a standard, non-market mechanism to satisfy taxes and does not represent an open-market sale or discretionary trading decision by the co-CEO.

Why were 2,166 Clean Harbors (CLH) shares forfeited by the co-CEO?

The 2,166-share disposition was a forfeiture of restricted stock back to the company. The filing states these shares were forfeited because Clean Harbors did not achieve performance targets under its Long Term Equity Incentive Program tied to those awards.

Does this Clean Harbors (CLH) Form 4 indicate any derivative option exercises?

No, the transaction summary shows no derivative exercises. There are no M, C, or X code transactions, and the derivative section is empty, indicating the reported activity involves only non-derivative Common Stock dispositions related to tax withholding and performance-based forfeiture.