ATMI Atmi Inc. (MM)

ATMI, Inc. (Nasdaq:ATMI) intends to release its second quarter 2013 financial results before the market opens on Wednesday, July 24, 2013. A conference call with management is scheduled for 11:00 a.m. Eastern Time (ET) the same day to review and discuss the results.

Participants should dial 877.766.0748. A replay will be available following the call and can be accessed at 855.859.2056 (access code 93696366). The call can also be accessed live and on-demand from the ATMI Investor Relations website at http://investor.atmi.com. A copy of management's presentation materials will be available on the ATMI Investor Relations website before the call.

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.

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 and Corporate Communications
         203.207.9349
         tdewar@atmi.com