Trust linked to Clean Harbors chair sells 100K shares

Clean Harbors executive Alan S. McKim, through the McKim 2007 Trust, reported an open-market sale of 100,000 shares of Clean Harbors common stock at $292.65 per share on March 4, 2026.

Rhea-AI Filing Summary

Clean Harbors executive Alan S. McKim, through the McKim 2007 Trust, reported an open-market sale of 100,000 shares of Clean Harbors common stock at $292.65 per share on March 4, 2026. After this sale, the McKim 2007 Trust held 2,065,368 shares. Separate from this, indirect holdings included 67,093 shares in the McKim 2025 Annuity Trust and 100,000 shares in the McKim 2026 Annuity Trust, while McKim directly held 34,027 shares of common stock.

Insider Trade Summary

Net Seller: 100,000 shares

Net Sell 4 txns

Insider MCKIM ALAN S

Role EXEC CHAIR, CTO.

Sold 100,000 shs ($29.26M)

Type	Security	Shares	Price	Value
Sale	Common Stock	100,000	$292.65	$29.26M
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 2,065,368 shares (Indirect, McKim 2007 Trust); Common Stock — 67,093 shares (Indirect, McKim 2025 Annuity Trust); Common Stock — 100,000 shares (Indirect, McKim 2026 Annuity Trust); Common Stock — 34,027 shares (Direct)

FAQ

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

What insider transaction did Clean Harbors (CLH) report for Alan S. McKim?

Clean Harbors reported that the McKim 2007 Trust, associated with executive Alan S. McKim, sold 100,000 shares of common stock in an open-market transaction at $292.65 per share on March 4, 2026, as disclosed in a Form 4 filing.

At what price were the Clean Harbors (CLH) shares sold in the latest Form 4?

The reported sale was executed at an average price of $292.65 per share. This open-market transaction involved 100,000 shares of Clean Harbors common stock sold by the McKim 2007 Trust on March 4, 2026, according to the insider trading disclosure.

How many Clean Harbors (CLH) shares does the McKim 2007 Trust hold after the sale?

Following the reported transaction, the McKim 2007 Trust held 2,065,368 shares of Clean Harbors common stock. This figure reflects the position after selling 100,000 shares in an open-market sale disclosed for the March 4, 2026 transaction date.

What other indirect holdings in Clean Harbors (CLH) are associated with Alan S. McKim?

In addition to the McKim 2007 Trust, the filing lists 67,093 shares held through the McKim 2025 Annuity Trust and 100,000 shares through the McKim 2026 Annuity Trust, representing additional forms of indirect ownership in Clean Harbors common stock.

Does Alan S. McKim have any direct ownership of Clean Harbors (CLH) shares?

Yes. The Form 4 shows that Alan S. McKim directly owned 34,027 shares of Clean Harbors common stock as of March 4, 2026. This direct holding is separate from shares held through the McKim 2007 Trust and related annuity trusts.

What is Alan S. McKim’s role at Clean Harbors (CLH) according to the filing?

Alan S. McKim is identified as Executive Chair and Chief Technology Officer. His positions are disclosed in the insider trading report, which details both his direct and indirect beneficial ownership of Clean Harbors common stock through several trusts and personal holdings.

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

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Accepted by SEC EDGAR 03/05/2026 - 11:07 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^*

MCKIM ALAN S

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EXEC CHAIR, CTO.

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2026

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	03/04/2026		S		100,000	D	$292.65	2,065,368	I	McKim 2007 Trust
Common Stock								67,093	I	McKim 2025 Annuity Trust
Common Stock								100,000	I	McKim 2026 Annuity Trust
Common Stock								34,027	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:

	/s/ C. Michael Malm, Attorney-in-Fact	03/05/2026
	** 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.