Disclosure of Equity Participation Pursuant to the Swiss Stock Exchange Act

Bad Ragaz/Switzerland — April 25, 2014 — INFICON Holding AG (SIX Swiss Exchange: IFCN), today announced that according to a notification signed on April 22, 2014, Mrs. Ruth Wertheimer, Herzelia/Israel owns as economic beneficiary through 7 Main Ltd, 7-Industries B.V.. and 7-Industries Holding B.V., all at Claude Debussylaan 24, 1082 MD Amsterdam, The Netherlands (Contact: SGG Management (Netherlands) B.V., Mr. R.C. Elshout Tel. +31 020 522 2555, Fax +31 020 522 2500) with an unchanged total of 226,752 registered shares now 9.8% of the voting rights in INFICON Holding AG following the entry of additional INFICON stock created by means of conditional capital increase effective as at April 14, 2014.