Re EGM

ARK THERAPEUTICS GROUP PLC (the "Company")

POSTPONEMENT OF EXTRAORDINARY GENERAL MEETING ("EGM")

In light of representations made to the Company by a number of shareholders, in part prompted by unavailability over the summer holiday season, the Board has taken the decision to reschedule the EGM from 11.00 a.m. on 19 August 2010 to 12 noon on 6 September 2010. The location of the EGM will not change.

This will, in addition, allow the Board to convene and consider in detail the next steps in the implementation of its strategy, informed by its discussions with Iain Ross who has spent the recent weeks working alongside management undertaking a wholesale review of the Group's business and operations. The Board wishes to inform shareholders of the outcome of those deliberations in advance of the EGM and will, therefore, provide a further update as part of its half-yearly report, which is scheduled to be released on 25 August.

In accordance with the Articles, the Board shall provide details of the postponed EGM in two UK national newspapers.

EGM Deadline and Voting Formalities

The current forms of proxy remain valid. The new deadline for the written forms of proxy must be submitted by 12 noon on 2 September 2010. Forms of proxy that have been validly submitted by shareholders to date shall remain valid for the postponed EGM.

Save as expressly stated in this document, the contents of the original notice of extraordinary general meeting, including without limitation the business to be conducted at the meeting and the Board's recommendation, shall be unchanged. Words and expressions defined in the original notice for the EGM, shall, unless the context otherwise requires, have the same meaning when read in this document. All other terms and provisions of the Company's original notice for the EGM along with the forms of proxy (all dated 28 July 2010) shall apply. For further details and copies of the relevant documents, please go to www.arktherapeutics.com.

A letter has been sent to the Company's shareholders setting out the information above, two copies of which have been sent to the UK Listing Authority Document Viewing Facility and will be available for viewing shortly.

For further information: