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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
1485479	Colburn Gregory Morris	22330 Wybenga Lane Nuevo CA 92567	Vice President, Gm, Field Ops	No	Yes	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	Acquisiton	2011-02-01	14,746	$7.07	71,433	No	4	M	Direct
Common Stock	Disposition	2011-02-01	14,746	$8.25	56,687	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Common Stock	Disposition	2011-02-01	14,746	$0.00	14,746	$7.07

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
7,374		2015-02-21	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	16,822	Indirect	By 401k Plan

Footnotes

These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on May 18, 2010.
This option is exercisable in three equal annual installments. The first installment became exercisable on 2/21/2009, the second installment became exercisable on 2/21/2010 and the last installment becomes exercisable on 2/21/2011.
These options were granted pursuant to an employee stock option plan that provides for the grant of options in consideration of services as an employee.