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

 2/14/18  Beckman Bruce W.                  4          Officer²    1:6K   Entegris Inc.                                              
 2/14/18  Beckman Bruce W.                  3          Officer²    2:8K   Entegris Inc.                                              
 2/14/18  Rucci Corey                       4          Officer²    1:9K   Entegris Inc.                                              
 2/14/18  Haris Clinton M.                  4          Officer²    1:6K   Entegris Inc.                                              
 2/14/18  Sauer Michael                     4          Officer²    1:4K   Entegris Inc.                                              
 2/14/18  Rice Susan G.                     4          Officer²    1:6K   Entegris Inc.                     Sauer Michael            
 2/14/18  Marshall Gregory Bryan            4          Officer²    1:8K   Entegris Inc.                                              
 2/14/18  Graves Gregory B                  4          Officer²    1:8K   Entegris Inc.                                              
 2/14/18  Edlund Todd James                 4          Officer²    1:8K   Entegris Inc.                                              
 2/14/18  Lee Sue                           4          Officer²    1:6K   Entegris Inc.                                              
 2/14/18  Tison Stuart                      4          Officer²    1:6K   Entegris Inc.                                              
 2/14/18  Shaner William James              4          Officer²    1:8K   Entegris Inc.                                              
 2/14/18  Loy Bertrand                      4          Dir.,Off.²  1:8K   Entegris Inc.                                              

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¹	Filing/Form Types:
	3	Initial Statement of Beneficial Ownership of Securities by an Insider — Form 3 { The Filer is an Insider² of the Issuer }.
	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.