Notification obligations

Under the Swiss Stock Exchange Act, anyone holding shares in a company listed in Switzerland, or derivative rights related to shares of such a company, has to notify the company and the stock exchange if the holding attains, falls below or exceeds one of the following thresholds: 3, 5, 10, 15, 20, 25, 33 1/3, 50, or 66 2/3% of the voting rights, whether they are exercisable or not. The detailed disclosure requirements and the methodology for calculating the thresholds are defined in the "Ordinance of the Swiss Financial Market Supervisory Authority on Stock Exchanges and Securities Trading" (disclosure of shareholdings). In particular, the ordinance prohibits the netting of so-called acquisition positions (i.e. in particular shares, conversion rights and acquisition rights or obligations) with disposal positions (i.e. rights or obligations to sell). It further requires that each such position be calculated separately and reported as soon as it reaches a threshold.

At 22 April 2009, UBS held a stake of UBS registered shares corresponding to less than 3% of the total share capital of UBS AG. At the same time, UBS had disposal positions relating to 979,166,943 voting rights of UBS AG and these corresponded to 33.39% of the total voting rights of UBS AG.

Updated and detailed information can be found on the following website of the SIX Swiss Exchange

Please note that this information should not be deemed legal advice by UBS. Shareholders are advised to consult their own legal counsel to make themselves familiar with their notification requirements and to address their particular situation and their specific questions.