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ThinkEquity LLC acts as Co-Manager on GenMark Diagnostics Inc.'s IPO

SAN FRANCISCO, June 1, 2010 — ThinkEquity LLC — A Panmure Gordon Company, a leading investment banking boutique focused on growth companies and their investors, is pleased to announce the completion of the initial public offering of stock for GenMark Diagnostics Inc. on June 1, 2010.

The Company issued 4,600,000 shares of common stock at a price of $6.00 per share raising gross proceeds of approximately $27.6 million. ThinkEquity LLC acted as a Co-Manager in this transaction. GenMark Diagnostics Inc.'s common stock is now trading on the NASDAQ Global Market under the symbol "GNMK".

GenMark Diagnostics is an emerging, pure-play molecular diagnostics company focused on developing, manufacturing, and marketing devices that facilitate molecular testing predominantly in genetic testing, but expanding into infectious disease and oncology testing. GenMark's eSensor electrochemical detection technology provides cutting-edge, cost-effectiveness and tools that enable a broader range of laboratories to offer molecular diagnostic services for improved patient care.

The securities describe above were offered by GenMark Dianostics Inc. pursuant to a S1 registration statement previously filed with and declared effective by the Securities and Exchange Commission on May 28, 2010. The final prospectus is available at the SEC's website at http://www.sec.gov, or by contacting ThinkEquity LLC at 600 Montgomery Street, 3rd Floor, San Francisco, CA 94111, Attn: Prospectus Department 415-249-2935.

ThinkEquity Contact:

Janet Faleski
Managing Director
T: 212.468.7083
E: jfaleski@thinkequity.com

Media enquiries:

Nathaniel Webb
Group Communications and Investor Relations Director
T: +44 20 7614 8333
E: nathaniel.webb@panmure.com

About ThinkEquity LLC — A Panmure Gordon Company
Focused on the growth sectors of the economy, ThinkEquity provides research, equity financing, M&A advisory, institutional sales and trading, wealth management and asset management services to institutional investors, corporate and private clients, venture capitalists, entrepreneurs and financial sponsors. As a Panmure Gordon company, ThinkEquity accesses the combined financial expertise of professionals based in San Francisco, New York, Boston, Chicago, London, Liverpool and Geneva. Research-driven, we remain true to our founding principles: the power of growth, focus, deep domain expertise and people. www.thinkequity.com

About the Panmure Gordon Group
Founded in 1876, Panmure Gordon & Co. (PMR.L) is a leading independent institutional stockbroker and investment bank. Encompassing its US franchise, ThinkEquity, LLC, the Group employs approximately 240 professionals across the US, the UK, Singapore and Nyon, Switzerland, offering a blend of transatlantic financial services including research, sales and trading, wealth management and asset management. www.panmure.com