Melvyn J. Powers of Commerce Park Management Company, its Manager and President, on behalf of Commerce Park Realty, LLC (the “Lessor”) regarding the Lease for 7 Commerce Drive, Danbury, CT 06810 between Lessor and Advanced Technology Materials, Inc. (the “Lessee”)

The Agreement of Lease dated December 23, 1994 between Melvyn J. Powers and Mary P. Powers, d/b/a M&M Realty, as original Lessor, and Lessee, as lessee (the “Original Lease”), as amended by (i) First Addendum to Lease dated January 27, 1995 (the “First Addendum”), (ii) Second Addendum to Lease dated February 24, 1995 (the “Second Addendum”), (iii) First Amendment to Agreement of Lease between Lessor and Lessee dated as of November 22, 2000 (the “First Amendment”), (iv) Second Amendment to Agreement of Lease between Lessor and Lessee dated as of March 24, 2003 (the “Second Amendment”), (v) the Third Amendment to Agreement of Lease between Lessor and Lessee dated as of January 18, 2007 (the “Third Amendment”), and (vi) the Fourth Amendment to Agreement of Lease between Lessor and Lessee dated as of October 30, 2008 (the “Fourth Amendment”); collectively with the Original Lease, the First Addendum, the Second Addendum, the First Amendment, the Second Amendment, the Third Amendment and the Fourth Amendment referred to herein as the “Lease”).

Mr. Tim Carlson — Executive Vice President and Chief Financial Officer, ATMI via email
Randy Green — Director Global Facilities & EHS, ATMI via email
Heather Schroder, Assistant Corporate Counsel, ATMI via email
John R. Ward, Esq., Pullman & Comley, 850 Main Street, P.O. Box 7006, Bridgeport, CT 06601-7006