CLH Rule 144: McKim trusts report 108,567 shares

CLEAN HARBOR HOLDINGS, INC.

Rhea-AI Filing Summary

CLEAN HARBOR HOLDINGS, INC. (CLH) submitted a Rule 144 notice reporting proposed sales of common stock by affiliated trusts. The filing lists a sale of 100,000 shares by the Alan S. McKim 2007 Trust dtd 04/04/2007 and 8,567 shares by the McKim Family 2025 Bequest Trust dtd 09/05/2025, both with trade date 02/19/2026. The second entry shows proceeds of $2,406,803.56 for the 8,567-share transaction.

FAQ

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

What does the CLH Form 144 filing report?

The filing reports proposed sales of common stock under Rule 144 by affiliated trusts. It lists a 100,000-share sale and an 8,567-share sale, both dated 02/19/2026, and shows $2,406,803.56 of proceeds for the 8,567-share entry.

Who are the sellers named in the CLH Rule 144 notice?

The sellers are trust entities associated with the McKim family: the Alan S. McKim 2007 Trust dtd 04/04/2007 and the McKim Family 2025 Bequest Trust dtd 09/05/2025, each showing common stock transactions with trade date 02/19/2026.

How many shares did the Alan S. McKim 2007 Trust report for sale in CLH filing?

The trust reported a proposed sale of 100,000 shares of common stock with a trade date of 02/19/2026. The filing entry labels the shares as acquired from the public market on 11/11/2009 and settled in cash.

What proceeds are shown for the 8,567-share transaction in the CLH filing?

The entry for the 8,567-share sale lists proceeds of $2,406,803.56 and a trade date of 02/19/2026. The filing pairs the McKim Family 2025 Bequest Trust designation with that sale amount.

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

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Accepted by SEC EDGAR 03/04/2026 - 05:04 PM EST Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001024547
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Clean Harbors, Inc.
SEC File Number	001-34223
Address of Issuer	42 Longwater Drive Norwell MASSACHUSETTS 02061
Phone	1-781-792-5000
Name of Person for Whose Account the Securities are To Be Sold	Alan S. McKim
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Goldman Sachs & Co. LLC 200 West Street New York NY 10282	100000	29300000	52910946	03/04/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	11/11/2009	Acquired from public market	Public Market			100000	11/11/2009	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Alan S. McKim 2007 Trust dtd 04/04/2007 42 Longwater Drive Norwell MA 02061	Common	02/19/2026	100000	28114500
McKim Family 2025 Bequest Trust dtd 09/05/2025 42 Longwater Drive Norwell MA 02061	Common	02/19/2026	8567	2406803.56

144: Remarks and Signature

Remarks	All shares to be sold by Alan S. McKim 2007 Trust dtd 04/04/2007.
Date of Notice	03/04/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Goldman Sachs & Co. LLC on behalf of Alan S. McKim
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)