Disclosure of Equity Participation Pursuant to the Swiss Stock Exchange Act

Bad Ragaz/Switzerland, February 12, 2009. INFICON Holding AG (SIX Swiss Exchange: IFCN), a leading, worldwide provider of instrumentation and process control software for advanced industrial vacuum processes, today announced, that according to a notification signed on February 6, 2009 by Schroder Plc, 31 Gresham Street, London, EC2V 7QA (Contact: Andrea Rowe, Schroders Plc, 31 Gresham Street, London, EC2V 7QA, Tel: +44 207 658 2521, Fax: +44 207 658 2155, Email: Groupdisclosure@Schroders.com) the company now holds less than 3%, namely 2.72% of the voting rights in INFICON Holding AG following a sale which took place on February 4, 2009.

Corporate Contact
Matthias Troendle
Chief Financial Officer
+423 388 3510
matthias.troendle@inficon.com