ATMI Atmi Inc. (MM)

ATMI, Inc. (Nasdaq:ATMI) announced that it is scheduled to participate in the 15th Annual Needham Growth Conference on January 16, 2013 at The New York Palace Hotel in New York City. A webcast link will be posted on the events and presentations section of http://investor.atmi.com.

About ATMI

ATMI, Inc. is a global provider of specialty semiconductor materials, and safe, high-purity materials handling and delivery solutions designed to increase process efficiencies for the microelectronics, life sciences, and other industries. For more information, please visit http://www.atmi.com.

The ATMI, Inc. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=5254

ATMI and the ATMI logo are trademarks, or registered trademarks, of Advanced Technology Materials, Inc., in the United States, other countries or both.

CONTACT: Troy Dewar
         Director, Investor Relations
         203.207.9349
         tdewar@atmi.com