Issue of Equity

Avacta Group plc Issue of Equity Acquisition of Reactivlab Limited Avacta Group plc ("Avacta" or the "Company"), which develops detection and analysis technology aimed primarily at the pharmaceutical and healthcare markets, with additional applications in the industrial and security sectors, is pleased to announce that in respect of the acquisition of Reactivlab Limited that was announced on 3 March 2010, following agreement of the Completion Accounts, an additional consideration of £8,467.58 will be paid to reflect the free cash in Reactivlab. This additional consideration will be satisfied by the issue of 471,731 ordinary shares of 0.1p ("Ordinary Shares"). Deferred consideration is payable on the second and third anniversary of completion as previously announced. Application has been made for 471,731 new Ordinary Shares to be admitted to trading on AIM and dealings are expected to commence on 3 August 2010. The total number of Ordinary Shares in issue following the above issue will be 1,434,814,870 each with voting rights. No Ordinary Shares are held in Treasury. The above figure of 1,434,814,870 shares 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. 29 July 2010 For further information, please contact: Avacta Group plc Tel: 0844 414 0452 Alastair Smith, Chief Executive Officer www.avacta.com Tim Sykes, Chief Financial Officer Broker Tel: 020 7101 7070 XCAP Securities Limited www.xcapgroup.com John Grant/Karen Kelly/David Newton Nominated Adviser Tel: 020 7383 5100 Grant Thornton Corporate Finance www.grantthornton.co.uk Philip Secrett/Colin Aaronson Financial PR Tel: 020 7417 8989 Haggie Financial LLP Nicholas Nelson/ Henny Breakwell Henny.Breakwell@haggie.co.uk Notes to Editors: About Avacta Avacta was spun-out from the University of Leeds in 2004 by its current management team as a biophysics company, with the aim of combining the disciplines of physics and biology to develop innovative technologies and expert technical services to address unmet needs in the biopharmaceutical and healthcare sectors. Avacta has a core bio-analytical technology development programme addressing the needs of the biopharmaceutical sector to fully characterise their new products at the earliest stage in their development to reduce the risk of late stage failure. High end analytical instruments and leading edge contract research services are being provided to the biopharmaceutical and healthcare/personal-care materials sectors through Avacta's biotech support division, Avacta Analytical. High value solutions for rapid, point of care diagnostics based on these core bio-analytical technologies, with a near term focus on veterinary diagnostics, are being delivered through Avacta Animal Health. Longer term these technologies will be transferred into the human clinical diagnostics market. Avacta listed on AIM in August 2006.
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