ENTEGRIS INC — Director's Dealing 2012

Jan 20, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ENTEGRIS INC (ENTG)
CIK: 0001101302
Period of Report: 2012-01-18

Reporting Person: Shaner William James (Vice President, GM, ME Div.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-01-18	Common Stock	M	7000	$2.10	Acquired	62566	Direct
2012-01-18	Common Stock	S	7000	$9.20	Disposed	55566	Direct
2012-01-18	Common Stock	M	27000	$1.13	Acquired	82566	Direct
2012-01-18	Common Stock	S	27000	$9.20	Disposed	55566	Direct
2012-01-18	Common Stock	M	12374	$5.40	Acquired	67940	Direct
2012-01-18	Common Stock	S	12374	$9.20	Disposed	55566	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-01-18	Employee Stock Option (Right to Buy)	$2.10	M	7000	Disposed	2015-12-16	Common Stock (7000)	Direct
2012-01-18	Employee Stock Option (Right to Buy)	$1.13	M	27000	Disposed	2016-02-19	Common Stock (27000)	Direct
2012-01-18	Employee Stock Option (Right to Buy)	$5.40	M	12374	Disposed	2017-02-19	Common Stock (12374)	Direct

Footnotes

F1: These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on November 30, 2011.

F2: 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.

F3: 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.

F4: 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.

F5: 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.