0001950047-23-006386.txt : 20231220 0001950047-23-006386.hdr.sgml : 20231220 20231220170640 ACCESSION NUMBER: 0001950047-23-006386 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20231220 DATE AS OF CHANGE: 20231220 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: CLEAN HARBORS INC CENTRAL INDEX KEY: 0000822818 STANDARD INDUSTRIAL CLASSIFICATION: HAZARDOUS WASTE MANAGEMENT [4955] ORGANIZATION NAME: 01 Energy & Transportation IRS NUMBER: 042997780 STATE OF INCORPORATION: MA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 001-34223 FILM NUMBER: 231502082 BUSINESS ADDRESS: STREET 1: 42 LONGWATER DRIVE STREET 2: P.O. BOX 9149 CITY: NORWELL STATE: MA ZIP: 02061-9149 BUSINESS PHONE: 781-792-5000 MAIL ADDRESS: STREET 1: 42 LONGWATER DRIVE CITY: NORWELL STATE: MA ZIP: 02061-9149 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: MCKIM ALAN S CENTRAL INDEX KEY: 0001024547 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 144 1 primary_doc.xml 144 0001024547 XXXXXXXX LIVE 0000822818 CLEAN HARBORS, INC. 001-34223 42 Longwater Drive Norwell MA 02061 (781) 792-5000 ALAN S. MCKIM 2007 TRUST Officer Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 38th Floor New York NY 10004

17453 3113096.85 54086261 12/20/2023 NYSE Common 07/01/2022 Private Acquisition from Issuer/Affiliate Issuer N 1544 07/01/2022 Cash Common 12/15/2022 Private Acquisition from Issuer/Affiliate Issuer N 3527 12/15/2022 Cash Common 12/15/2021 Private Acquisition from Issuer/Affiliate Issuer N 12382 12/15/2021 Cash N ALAN S. MCKIM 2007 TRUST

42 Longwater Drive Norwell MA 02061

Common 11/16/2023 75000 12473250.00 12/20/2023 /s/ Alan S. McKim