Disclosure of Equity Participations Pursuant to the Swiss Stock Exchange Act

Bad Ragaz, Switzerland, June 6, 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:

According to a notification signed on June 5, 2014 by Henderson Global Investors, 201 Bishopsgate, London, EC2M 3AE, UK (Contact: Balenkosi Dungeni, Henderson Global Investors, 201 Bishopsgate, London, EC2M 3AE, UK, Tel +44 20 7818 3747), this company holds due to a purchase agreed on June 3, 2014 and following the transfer of the respective shares on June 6, 2014 with 77,237 registered shares 3.35% of the voting rights in INFICON Holding AG.