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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
1485428	James William Shaner	9754 Summit Ash Court Colorado Springs CO 80920	Vice President, Gm, Me Div.	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
Common Stock	Acquisiton	2012-01-18	7,000	$2.10	62,566	No	4	M	Direct
Common Stock	Disposition	2012-01-18	7,000	$9.20	55,566	No	4	S	Direct
Common Stock	Acquisiton	2012-01-18	27,000	$1.13	82,566	No	4	M	Direct
Common Stock	Disposition	2012-01-18	27,000	$9.20	55,566	No	4	S	Direct
Common Stock	Acquisiton	2012-01-18	12,374	$5.40	67,940	No	4	M	Direct
Common Stock	Disposition	2012-01-18	12,374	$9.20	55,566	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct
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	Employee Stock Option (Right to Buy)	Disposition	2012-01-18	7,000	$0.00	7,000	$2.10
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2012-01-18	27,000	$0.00	27,000	$1.13
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2012-01-18	12,374	$0.00	12,374	$5.40

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
7,000	2015-12-16	No	4	M	Direct
27,000	2016-02-19	No	4	M	Direct
24,746	2017-02-19	No	4	M	Direct

Footnotes

These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on November 30, 2011.
These options are part of a grant that vest in four equal annual installments. The first annual installment became exercisable on 12/16/2009, the second annual installment became exercisable on 12/16/2010 and the third annual installment became exercisable on 12/16/2011. The last annual installment becomes exercisable on 12/16/2012.
These options are part of a grant that vest in three equal annual installments. The first annual installment became exercisable on 2/19/2010, the second annual installment became exercisable on 2/19/2011. The last annual installment becomes exercisable on 2/19/2012.
These options are part of a grant that vest in three equal annaul installments. The first annual installment became exercisable on 2/19/2011. The second annual installment becomes exercisable on 2/19/2012. The last annual installment becomes exercisable on 2/19/2013.
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.