BB Biotech AG : Publication pursuant to §26 sect.1 WpHG (the German Securities Trading Act) with the aim of pan-European distribution

BB Biotech AG / BB Biotech AG : Publication pursuant to §26 sect.1 WpHG (the German Securities Trading Act) with the aim of pan-European distribution . Ad hoc announcement according to § 15 WpHG. Processed and transmitted by Thomson Reuters ONE. The issuer is solely responsible for the content of this announcement. Pursuant to article 26 sec 1 clause 2 WpHG, BB Biotech AG, Schaffhausen, Switzerland, herby reports that it decreased its holding in own shares to below 3% of the proportion of voting rights as of September 19, 2013 (a total of 342 246 shares / 2.89% of the proportion of voting rights). Thereof, 0.63% of the proportion of voting rights (a total of 74 746 shares) are held through its wholly-owned subsidiary Biotech Target N.V., Curaçao. For further information: Bellevue Asset Management AG, Seestrasse 16, 8700 Küsnacht / Zürich Tanja Chicherio, Tel. +41 44 267 67 00. Schaffhausen, September 24, 2013 BB Biotech AG This announcement is distributed by Thomson Reuters on behalf of Thomson Reuters clients. The owner of this announcement warrants that: (i) the releases contained herein are protected by copyright and other applicable laws; and (ii) they are solely responsible for the content, accuracy and originality of the information contained therein. Source: BB Biotech AG via Thomson Reuters ONE [HUG#1730875]