Sub-Division of Shares

ABCAM PLC

("Abcam" or "the Company")

Sub-Division of Shares

Abcam plc (AIM: ABC), the rapidly growing bioscience company that markets antibodies via its own online catalogue, announces that the five for one sub-division of Abcam's ordinary shares of 1 pence each, approved by shareholders at its Annual General Meeting on 1 November 2010, has become effective today. The sub-division has reduced the market price and increased the number of shares in issue. Following the sub-division the Company now has a total of 180,394,820 ordinary shares of 0.2p each in issue.

For further information please contact:

Notes for editors:

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 67,000 products, most of which are antibodies, from over 250 suppliers and employs 270 staff.