PRESS RELEASE: BB Biotech AG : Publication pursuant to --26a WpHG (the German Securities Trading Act) with the aim of pan-European distribution

BB Biotech AG / BB Biotech AG : Publication pursuant to --26a WpHG (the German Securities Trading Act) with the aim of pan-European distribution . Processed and transmitted by Thomson Reuters ONE. The issuer is solely responsible for the content of this announcement.

Pursuant to article 26a WpHG, BB Biotech AG, Vordergasse 3, 8200 Schaffhausen, Switzerland, hereby announces that the total voting rights at the end of June 2013 amount to 11 850 000.

The new number of voting rights is effective as of June 17, 2013.

For further information please contact:

Bellevue Asset Management AG, Seestrasse 16, 8700 Küsnacht / Zurich

Thomas Egger, Tel. +41 44 267 67 00.

Release (PDF): http://hugin.info/136834/R/1712777/568404.pdf

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#1712777

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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

   June 28, 2013 11:46 ET (15:46 GMT)- - 11 46 AM EDT 06-28-13