144 0001211558 XXXXXXXX LIVE 0000822818 CLEAN HARBORS INC 001-34223 42 LONGWATER DRIVE P.O. BOX 9149 NORWELL MA 02061-9149 781-792-5000 GERSTENBERG ERIC W Officer COMMON RAYMOND JAMES & ASSOC.

880 CARILLON PKWY ST. PETERSBURG FL 33716

8076 1818000.00 53856836 06/06/2025 NYSE COMMON 03/15/2025 SHARE VESTING CLEAN HARBORS INC N 1043 03/15/2025 EQUITY COMP COMMON 02/01/2025 SHARE VESTING CLEAN HARBOR INC N 7033 02/01/2025 EQUITY COMP Y 06/06/2025 MOHAMMED ALSHATRI, as duly authorized representative of Raymond James & Associates, Inc., as attorney-in-fact for ERIC GERSTENBERG