Disclosure of Equity Participations Pursuant to the Swiss Stock Exchange Act

Bad Ragaz, Switzerland, December 8, 2014 — 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, announced today that according to a notification received on December 5, 2014 from Credit Suisse Funds AG, Uetlibergstrasse 231, 8045 Zürich (Contact: Christian Pascual, Credit Suisse AG, phone +41 44 332 0526), this company now holds less than 3% of the voting rights in INFICON Holding AG after a sale on December 2, 2014.