ENTEGRIS INC — Director's Dealing 2012

Nov 2, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ENTEGRIS INC (ENTG)
CIK: 0001101302
Period of Report: 2012-10-31

Reporting Person: ARGOV GIDEON (Director, Pres & Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-10-31	Common Stock	M	163688	$1.13	Acquired	879770	Direct
2012-10-31	Common Stock	S	163688	$8.2195	Disposed	716082	Direct
2012-11-01	Common Stock	M	206312	$1.13	Acquired	922394	Direct
2012-11-01	Common Stock	S	206312	$8.2356	Disposed	716082	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-10-31	Employee Stock Option (Right to Buy)	$1.13	M	163688	Disposed	2016-02-19	Common Stock (163688)	Direct
2012-11-01	Employee Stock Option (Right to Buy)	$1.13	M	206312	Disposed	2016-02-19	Common Stock (206312)	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 $8.20 to $8.30, 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: 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 $8.20 to $8.36, 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.

F3: These options are fully vested.

F4: 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.