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Press Release

Zug, 6 January 2012

ChemoCentryx licenses investigational drug for rheumatoid arthritis to GlaxoSmithKline

ChemoCentryx, the fourth largest private company in the portfolio of HBM BioVentures, has licensed another drug candidate to GlaxoSmithKline (GSK) under an existing collaboration between the two companies. GSK has exercised its option to obtain an exclusive license for the further development and worldwide commercialization of CCX354. CCX354 is a phase II compound for the treatment of rheumatoid arthritis, a severe, chronic inflammatory disease affecting over 20 million people worldwide.
Under the terms of the transaction, ChemoCentryx will receive an option exercise fee of USD 25 million and will be eligible for further milestone payments and royalties. GSK will be solely responsible for funding the further clinical development and commercialization of CCX354 worldwide.
HBM BioVentures has invested USD 13.7 million in ChemoCentryx and is with an ownership stake of 8% one of the company's largest shareholders. The book value of the investment is USD 18.5 million and will not be changed in accordance with HBM BioVentures' valuation principles, in spite of this positive news.
CCX354 is already the second drug candidate from ChemoCentryx licensed to GSK. In January
2010, the two companies closed a similar transaction for CCX282-B, an investigational drug for the treatment of inflammatory bowel diseases such as Crohn's disease. ChemoCentryx has a number of additional products in development, including three further drugs in clinical development.

About ChemoCentryx

ChemoCentryx Inc., located in Mountain View (California), develops orally administered drugs for inflammatory diseases and other conditions, applying its proprietary platform for chemokine-based therapeutics. GSK's exercise of this second licensing option is another important milestone in the validation of the company's drug discovery and development platform. To find out more, visit the
ChemoCentryx website at www.chemocentryx.com.

HBM BioVentures Ltd

Bundesplatz 1 CH-6300 Zug | Tel: +41 41 768 11 08 | Fax: +41 41 768 11 09 | info@hbmbioventures.com www.hbmbioventures.com

NOT FOR DISTRIBUTION IN USA, CANADA, JAPAN OR AUSTRALIA

For further information, please contact Dr. Andreas Wicki, CEO HBM BioVentures Ltd, tel.: +41 41
768 11 08, andreas.wicki@hbmbioventures.com.

Profile of HBM BioVentures AG

HBM BioVentures invests in the healthcare sector. The Company holds and manages an international portfolio of some twenty five promising companies in the biotechnology/human medicine, medical technology and diagnostics sectors. Many of these companies have their lead products already available on the market, or at an advanced stage of development. The focus of investment is on follow-on financing for existing portfolio companies. These portfolio companies are closely tracked and actively guided on their strategic directions. This is what makes HBM BioVentures an interesting alternative to investing in big pharma and biotech companies. HBM BioVentures has an international shareholder base and is listed on SIX Swiss Exchange (ticker: HBMN).

Disclaimer

This media release does not constitute an issue prospectus within the meaning of Art. 652a or Art. 1156 of the Swiss Code of Obligations, a listing prospectus in the sense of the SIX Swiss Exchange Listing Rules or a securities prospectus as defined in the German Securities Prospectus Act (Wertpapierprospektgesetz). Publication is for information purposes only and constitutes neither an offer to sell nor an invitation to buy or subscribe for securities. This media release and the information it contains must not be distributed or forwarded to or within the United States of America (USA) or to US persons (including legal entities) or publications with a general circulation in the USA. This media release does not constitute an offer or invitation to purchase any securities in the USA. The securities of HBM BioVentures Ltd have not been registered under United States securities legislation and may not be offered, sold or delivered within the USA or to US persons without prior registration or the corresponding exemption from the registration requirements

of US securities legislation.

HBM BioVentures Ltd

Bundesplatz 1 CH-6300 Zug | Tel: +41 41 768 11 08 | Fax: +41 41 768 11 09 | info@hbmbioventures.com www.hbmbioventures.com

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ChemoCentryx licenses investigational drug for rheumatoid arthritis to GlaxoSmithKline