Clean Harbors co-CEO withholds shares for tax payment

CLEAN HARBORS INC co-CEO and director Michael Louis Battles reported a Form 4 transaction involving company common stock.

Rhea-AI Filing Summary

CLEAN HARBORS INC co-CEO and director Michael Louis Battles reported a Form 4 transaction involving company common stock. On 2026-07-01, 1,032 shares of common stock were withheld at $290.74 per share to pay a tax liability arising from vesting, as described under Rule 16b3. This was a tax-withholding disposition rather than an open-market sale. Following this transaction, Battles directly holds 94,355 shares of CLEAN HARBORS INC common stock.

Insider Trade Summary

Tax Withholding: 1,032 shares

Tax Withholding 1 txn

Insider Battles Michael Louis

Role CO-CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	1,032	$290.74	$300K

Holdings After Transaction: Common Stock — 94,355 shares (Direct)

Footnotes (1)

1. F1. Payment of tax liability by withholding of securities incident to vesting of securities in accordance with Rule 16b3

Key Figures

Shares withheld for tax: 1,032 shares Per-share value for withholding: $290.74 per share Post-transaction holdings: 94,355 shares

3 metrics

Shares withheld for tax 1,032 shares Common stock disposed of on 2026-07-01 to pay tax liability

Per-share value for withholding $290.74 per share Reference price used for the 1,032-share tax-withholding transaction

Post-transaction holdings 94,355 shares Directly held CLEAN HARBORS common stock after the reported transaction

Key Terms

Rule 16b3, withholding of securities, tax liability

3 terms

Rule 16b3 regulatory

"incident to vesting of securities in accordance with Rule 16b3"

withholding of securities financial

"Payment of tax liability by withholding of securities incident to vesting"

tax liability financial

"Payment of tax liability by withholding of securities incident to vesting"

FAQ

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

What insider transaction did CLEAN HARBORS (CLH) report for Michael Louis Battles?

CLEAN HARBORS co-CEO Michael Louis Battles reported a Form 4 showing 1,032 shares of common stock were withheld to cover tax liability related to vesting, rather than sold on the open market.

How many CLEAN HARBORS (CLH) shares were involved in the latest Form 4?

The Form 4 reports that 1,032 shares of CLEAN HARBORS common stock were disposed of via withholding for tax liability, at a reference value of $290.74 per share tied to the vesting event.

What is Michael Louis Battles’ CLEAN HARBORS (CLH) shareholding after this transaction?

After the tax-withholding disposition, Michael Louis Battles directly holds 94,355 shares of CLEAN HARBORS common stock, as reported in the Form 4’s post-transaction ownership field.

Was the CLEAN HARBORS (CLH) Form 4 transaction an open-market sale?

No. The Form 4 describes the transaction as payment of tax liability by withholding securities incident to vesting under Rule 16b3, not as an open-market share sale.

At what price were the CLEAN HARBORS (CLH) shares valued for the tax withholding?

The withheld shares were valued at $290.74 per share for the reported tax-liability transaction, according to the per-share price field associated with the 1,032-share disposition.

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

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Accepted by SEC EDGAR 08/12/2026 - 07:57 AM EDT 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^*

Battles Michael Louis

(Last) (First) (Middle)

42 LONGWATER DRIVE

(Street)

NORWELL MASSACHUSETTS 02061

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	07/01/2026		F		1,032(1)	D	$290.74	94,355	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/ Michael Battles	08/12/2026
	** 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.
* Form 4: SEC 1474 (03-26)