Total Voting Rights

ABCAM PLC

("Abcam" or "the Company")

Total Voting Rights - Voting Rights and Capital

In conformity with 5.6.1 of the Disclosure and Transparency Rules, the Company notifies the market of the following: The Company's issued share capital consists of 180,987,972 Ordinary Shares of 0.2p each with voting rights. The Company does not hold any shares in Treasury.The above figure of 180,987,972 may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in the Company under the FSA's Disclosure and Transparency Rules.

Date of Notification: 4 April 2011

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About Abcam plc

Abcam is a producer and distributor of research-grade antibodies and related products, headquartered in Cambridge, United Kingdom, with US offices in Cambridge, Massachusetts, and San Francisco, California, and Far East offices in 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 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 products are sold under the Abcam brand name and the Company's vision is to build the world's largest online resource of high-quality and commercially viable antibodies. Abcam now has an online catalogue of over 71,000 products, most of which are antibodies, from over 250 suppliers and employs 290 staff.