ENTEGRIS INC — Director's Dealing 2012

May 2, 2012

SEC Form 4/A — Form 4/A

Issuer: ENTEGRIS INC (ENTG)
CIK: 0001101302
Period of Report: 2011-09-01

Reporting Person: MCDANIEL ROGER D (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-09-01	Common Stock	S	10000	$7.544	Disposed	69768	Direct

Footnotes

F1: These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on July 28, 2011.

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 $7.44 to $7.59, 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: This filing is being amended to adjust an understatement of 11,806 shares of Common Stock beneficially owned following the otherwise accurately reported transaction as set forth in the Form 4 filed on September 6, 2011 in Table I, Box 5. Forms 4 filed after September 6, 2011 also included the understatement of shares.