Pursuant to article 20 BEHG BB Biotech AG, Vordergasse 3, 8200 Schaffhausen and its wholly-owned subsidiary Biotech Target N.V., Snipweg 26, Curaçao, hereby report that they increased their voting rights to more than 20% of the proportion of voting rights of BB Biotech AG as at November 14, 2011.

Portfolio of BB Biotech AG as of December 31, 2011