Disclosure of shareholding

In accordance with the regulations laid down in the law governing the stock exchange (Art. 20), Ascom Holding AG received the below-mentioned notifiable information:

Shareholder:

Zürcher Kantonalbank, Bahnhofstrasse 9, Postfach, 8010 Zürich

Proportion of voting rights: below 5%

Ascom Holding AG

About Ascom

Ascom is an international solution provider with comprehensive technological know-how in Mission-Critical Communication. The company concentrates on the core areas of Wireless Solutions (high-value, customer-specific on-site communications solutions) and Security Solutions (applications for security, communication and control systems for infrastructure operators, public security institutions and the army). The company has subsidiaries in 17 countries and a workforce of some 2,000 employees worldwide. Ascom registered shares (ASCN) are listed on the SWX Swiss Exchange in Zurich.

This document does not constitute an offer or solicitation to subscribe for, purchase or sell any securities. This document is not being issued in the United States of America or the United Kingdom and should not be distributed in any jurisdiction in a manner where such distribution would not comply with regulatory requirements. In particular, this document may not be distributed into the United States, to United States persons or to publications with a general circulation in the United States. In addition, the securities of Ascom have not been and will not be registered in any jurisdiction outside Switzerland. The securities of Ascom may not be offered, sold or delivered and no solicitation to purchase such securities may be made within the United States or to U.S. persons absent an applicable exemption from the registration requirements of the United States securities laws or within any other jurisdiction and in a manner where such offer, sale, delivery or solicitation might not be in compliance with regulatory requirements (including the United Kingdom).