February 6 2008 Disclosure of Equity Participation Pursuant to the Swiss Stock Exchange Act

Syracuse, New York/Zurich, Switzerland — February 6, 2008 — INFICON Holding AG (SWX 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 UBS Fund Management (Switzerland) AG, PO Box, 4002 Basel (contact person Cinzia Görtz, + 41 44 239 43 86) disclosed on December 21, 2007 in accordance with SWX Swiss Exchange's new disclosure reporting threshold of 3%, an equity participation in INFICON Holding AG of 106,066 registered shares at CHF 5 par value each. This represents 4.5 % of the voting rights in INFICON Holding AG.


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Betty Ann Kram
Director of Global Communications

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Bernhard Schweizer
sensus PR GmbH

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