As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

  3/7/18  Bouldin Mark G.                   4          Officer²    1:4K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  McKim Alan S                      4          Dir.,Off.²  1:5K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Parry David M                     4          Officer²    1:4K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Curtis George L                   4          Officer²    1:4K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Twohig Michael J                  4          Officer²    1:4K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Dugas Eric J.                     4          Officer²    1:4K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Cowan Grace                       4          Officer²    1:4K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Bouldin Mark G.                   4          Officer²    1:5K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Battles Michael Louis             4          Officer²    1:4K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Dugas Eric J.                     4          Officer²    1:4K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Knapp Jeffrey Herbert             4          Officer²    1:4K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Weber Brian P                     4          Officer²    1:5K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Gerstenberg Eric W                4          Officer²    1:5K   Clean Harbors Inc.                Section16 Direct/FA      
  3/2/18  Kraus Eric A                      4          Officer²    1:4K   Clean Harbors Inc.                Section16 Direct/FA      

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¹	Filing/Form Type:
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.