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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1101302	Entegris Inc	ENTG	Plastics Products, Nec (3089)	411941551

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
940454	F Brian Sullivan	2400 Bantle Farm Road Medina MN 55340		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2011-05-04	28,600	$8.51	112,607	No	4	S	Direct
Common Stock	Acquisiton	2011-05-04	11,806	$0.00	124,413	No	4	A	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	A	Direct

Footnotes

The price reported in column 4 is a weighted average price reported in reliance on a letter from the Office of Chief Counsel, Securities and Exchange Commission's Division of Corporate Finance to the Society of Corporate Securities & Corporate Governance Professionals dated June 25, 2008. These shares were sold in multiple transactions at prices ranging from $8.4900 to $8.5550, inclusive. The reporting person undertakes to provide Entegris, Inc. any shareholder of Entegris, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
These shares were awarded, effective May 4, 2011, as Restricted Stock Units, payable solely in Common Stock, pursuant to the Entegris, Inc. 2010 Stock Plan which provides for the award of Restricted Stock Units to independent directors in consideration for services as such.