BILLERICA, Mass., October 24, 2012 - Entegris, Inc. (Nasdaq: ENTG) today announced that Bertrand Loy, currently chief operating officer will succeed Gideon Argov as president and CEO as part of a management succession and transition plan. On November 1, 2012, Bertrand Loy was promoted to president and elected to the Entegris Board of Directors and will assume the position of chief executive officer effective November 27, 2012.

Paul Olson, Entegris' chairman of the board, said "The board has been developing a robust succession process with Gideon and Bertrand over the past two years. Bertrand is the perfect choice to lead Entegris going forward. He brings a keen intellect, excellent financial and operating skills, a global mindset, industry recognition, and a proven track record over the course of his 17-year career serving in senior financial and operating executive roles for Entegris and its predecessor company, Mykrolis. On behalf of the board, I want to thank Gideon for his eight years of insightful leadership and for creating an excellent foundation on which to build for Entegris."

Mr. Argov said, "Entegris is an exceptional company and it has been an honor and privilege to lead it through a period of transformation change. With the company on a solid financial footing and performing well, the time is right to make this transition. I leave the Company in good hands to continue to grow and extend its market leadership."

Mr. Loy said, "I am excited to be named as the next chief executive officer of Entegris. Together with Gideon and the global Entegris teams, we have built a highly successful platform focused on helping leading technology companies improve their yields and advance their process technologies. I look forward to leading Entegris into a very promising future."

Mr. Loy has been the Chief Operating Officer for Entegris since July 2008. Prior to that, he was the Chief Administrative Officer for Entegris from August 2005 to July 2008, and was the Chief Financial Officer of Mykrolis from January 2001 until the 2005 Merger with Entegris. From 1995 to April 1999, Mr. Loy served as the Division Controller for Millipore's Laboratory Water Division before acting as the Chief Information Officer for Millipore until December 2000. Prior to that, Mr. Loy was with Sandoz Pharmaceuticals (now Novartis). Mr. Loy serves as a director of BTU International, Inc. and is a member of the SEMI North America Advisory Board (NAAB). He holds a master's in business administration (MBA) from ESSEC, France.

About Entegris
Entegris is a leading provider of a wide range of products for purifying, protecting and transporting critical materials used in processing and manufacturing in the semiconductor and other high-tech industries. Entegris is ISO 9001 certified and has manufacturing, customer service and/or research facilities in the United States, China, France, Germany, Israel, Japan, Malaysia, Singapore, South Korea and Taiwan. Additional information can be found at www.entegris.com.

CONTACT:
Steven Cantor
VP of Corporate Relations
T +1 978 436 6750
irelations@entegris.com