November 26 2008 Disclosure of Equity Participation Pursuant to the Swiss Stock Exchange Act

Syracuse, New York/Zurich, Switzerland - November 26, 2008 - INFICON Holding AG (SIX Swiss Exchange: IFCN), a leading manufacturer of vacuum instrumentation and process control software for the semiconductor and related industries and other industrial applications, today announced, that according to a notification signed on November 25, 2008, UBS Fund Management (Switzerland) AG, PO Box, 4002 Basel (contact person Cintia Gurtz, UBS, PO Box, 8098 Zurich, +41 44 239 9697) holds after a sale on November 21, 2008, with 106,292 registered shares of INFICON Holding AG or 4.96% of the voting rights now less than 5% of the voting rights in INFICON Holding AG.


Corporate Contact
Betty Ann Kram
Director of Global Communications
+1.315.434.1122
BettyAnn.Kram@inficon.com

European Contact
Bernhard Schweizer
sensus PR GmbH
+41.43.366.5511
inficon@sensus.ch