0001950047-23-001248.txt : 20230602 0001950047-23-001248.hdr.sgml : 20230602 20230602180434 ACCESSION NUMBER: 0001950047-23-001248 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20230602 DATE AS OF CHANGE: 20230602 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: CLEAN HARBORS INC CENTRAL INDEX KEY: 0000822818 STANDARD INDUSTRIAL CLASSIFICATION: HAZARDOUS WASTE MANAGEMENT [4955] 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: 23990533 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: Welch John R. CENTRAL INDEX KEY: 0001611303 FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: 84 SUMMER STREET CITY: WESTON STATE: MA ZIP: 02493 144 1 primary_doc.xml 144 0001611303 XXXXXXXX LIVE 0000822818 CLEAN HARBORS, INC. 001-34223 42 Longwater Drive Norwell MA 02061 (781) 792-5000 JOHN R WELCH Director Common Morgan Stanley Smith Barney LLC

1 New York Plaza 38th Floor New York NY 10004

1000 150430.60 54104121 06/02/2023 NYSE Common 06/08/2017 Restricted Stock Issuer N 104 06/08/2017 Not Applicable Common 06/07/2018 Restricted Stock Issuer N 896 06/07/2018 Not Applicable Y 06/02/2023 /s/ John R. Welch