Press Release: 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

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BB Biotech AG

Vordergasse 3 Schaffhausen Switzerland

WKN: 888509;ISIN: CH0038389992;Index:TecDAX,MIDCAP,Prime All Share,TECH All Share,HDAX;

Listed: Regulierter Markt in Frankfurter Wertpapierbörse;

http://www.bbbiotech.com (END) Dow Jones Newswires

   September 24, 2013 01:30 ET (05:30 GMT)- - 01 30 AM EDT 09-24-13