Press Release: Disclosure pursuant to article 26 sec 1 clause 2 WpHG (own shares) as at November 7, 2013

BB Biotech AG / Disclosure pursuant to article 26 sec 1 clause 2 WpHG (own shares) as at November 7, 2013 . 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.

Disclosure of shareholding

Pursuant to article 26 sec 1 clause 2 WpHG, BB Biotech AG, Schaffhausen, Switzerland, herby reports that it increased its holding in own shares to more than 3% of the proportion of voting rights as of November 5, 2013 (a total of 356 639 shares / 3.01% of the proportion of voting rights).

Thereof, 0.27% of the proportion of voting rights (a total of 31 639 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, November 7, 2013

BB Biotech AG

Release (PDF): http://hugin.info/136834/R/1741117/584869.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#1741117

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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

   November 07, 2013 01:31 ET (06:31 GMT)- - 01 31 AM EST 11-07-13