ENTEGRIS INC — Director's Dealing 2012

May 14, 2012

SEC Form 4/A — Form 4/A

Issuer: ENTEGRIS INC (ENTG)
CIK: 0001101302
Period of Report: 2011-02-22

Reporting Person: Morris Gregory Colburn (Vice President, GM, Field Ops.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-22	Common Stock	A	11187	—	Acquired	69874	Direct

Footnotes

F1: These shares are restricted stock units with restrictions that lapse over a 4 year period with respect to 25% of these shares per year, starting on February 19, 2012.

F2: This restricted stock unit award was made pursuant to an equity incentive award plan in consideration of services as an employee.

F3: This filing is being amended to adjust an overstatement of 12,746 shares of Common Stock beneficially owned following the otherwise accurately reported transaction as set forth in the Form 4 filed on February 24, 2011 in Table I, Box 5. Subsequent transactions included in the Form 4 filed on February 24, 2011 and Forms 4 and Forms 4/A filed after February 24, 2011 also included the overstatement of shares.