Director/PDMR Shareholding

Abcam plc ("Abcam" or "the Company")

Director Dealings

Cambridge, UK: Abcam plc (AIM: ABC), the rapidly growing bioscience company that markets antibodies via its own online catalogue, announces that it was notified on 5 May 2010 that Prof. Tony Kouzarides, a non-executive director of the Company, sold 5,000 ordinary shares of 1 pence each in the Company on 5 May 2010 at a price of 1187p per ordinary share. Following this transaction Prof. Kouzarides has an interest in 80,244 ordinary shares of 1 pence each in the Company representing approximately 0.22% of the Company's issued share capital.

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About Abcam plc

Abcam is a producer and distributor of research-grade antibodies headquartered in Cambridge, United Kingdom, with subsidiaries in Cambridge, Massachusetts, Tokyo and Hong Kong. Abcam was admitted to AIM in November 2005 and trades under the ticker symbol ABC. The Company produces and distributes its own and third-party produced antibodies and related products to academic and commercial users throughout the world. Product ordering is available through the Company's website www.abcam.com, where customers are also able to access up-to-date and detailed technical product data sheets. All the antibodies are sold under the Abcam brand name. Abcam's mission is to develop the largest catalogue of the best antibodies in the world, with the vision of becoming a global leader in the wider protein detection and regulation markets. Abcam now has a rapidly growing online catalogue and as at 31 December 2009 it contained 57,960 products, most of which are antibodies, from over 250 suppliers. Abcam employs 250 staff in its four operating companies.