DANBURY, Conn., May 15, 2012 (GLOBE NEWSWIRE) -- ATMI, Inc. (Nasdaq:ATMI) announced that it is scheduled to participate in these upcoming conferences:

• D.A. Davidson & Co. 4th Annual Technology Forum, New York, NY on May 30, 2012
• Cowen and Company 40th Annual Technology Media & Telecom Conference, New York, NY on May 31, 2012
• Bank of America Merrill Lynch Smid Cap Conference, Boston, MA on June 7, 2012

Where available, a webcast link will be posted on ATMI.com's investor, events and presentations page.

About ATMI

ATMI, Inc. provides specialty semiconductor materials, and high-purity materials handling and delivery solutions designed to increase process efficiencies for the worldwide semiconductor, flat panel, and life sciences industries. For more information, please visit http://www.atmi.com.

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

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

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