ENTEGRIS INC — Director's Dealing 2012

Feb 21, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ENTEGRIS INC (ENTG)
CIK: 0001101302
Period of Report: 2012-02-16

Reporting Person: LOY BERTRAND (Exec VP & COO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-16	Common Stock	M	150000	$6.43	Acquired	333911	Direct
2012-02-16	Common Stock	S	150000	$9.4542	Disposed	183911	Direct
2012-02-16	Common Stock	M	34834	$5.40	Acquired	218745	Direct
2012-02-16	Common Stock	S	34834	$9.4542	Disposed	183911	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-16	Employee Stock Option (Right to Buy)	$6.43	M	150000	Disposed	2015-07-07	Common Stock (150000)	Direct
2012-02-16	Employee Stock Option (Right to Buy)	$5.40	M	34834	Disposed	2017-02-19	Common Stock (34834)	Direct

Footnotes

F1: 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 Secretaries & Corporate Governance Professionals dated June 25, 2008. These shares were sold in multiple transactions at prices ranging from $9.4500 to $9.4700, 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.

F2: This option is fully vested.

F3: 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.

F4: This option vests in three equal annual installments on February 19, 2011, February 19, 2012 and February 19, 2013.