Holding(s) in Company

1 

Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

ARK THERAPEUTICS GROUP PLC

2.

Reason for the notification (please tick the appropriate box or boxes):

N/A

An acquisition or disposal of voting rights:

(x)

An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

( )

An event changing the breakdown of voting rights:

( )

Other

( )

3.

Full name of person(s) subject to the notification obligation:

Aberforth Partners LLP

4.

Full name of shareholder(s) (if different from 3):

Shareholder

Shares

1. Aberforth Smaller Companies Trust plc

10,702,941

2. Aberforth UK Small Companies Fund

8,264,726

3. The Church Commissioners for England

1,854,748

1, 2 = registered in the name of Nortrust Nominees Ltd A/c Aberfrth

3 = The Church Commissioners for England (Chase GIS) Nominees Ltd

5.

Date of the transaction and date on which the threshold is crossed or reached if different:

21/05/2008

6.

Date on which issuer notified:

22/05/2008

7.

Threshold(s) that is/are crossed or reached:

10%

8.

Notified details:

A:  Voting rights attached to shares

Class/type of shares:

Ordinary

GB0034251727

Situation previous to the triggering transaction:

Number of shares:

11,325,634

Number of voting rights:

11,325,634

Resulting situation after the triggering transaction:

Number of shares:

20,822,415

Number of voting rights:

Direct:

N/A

Indirect:

20,822,415

% of voting rights:

Direct:

N/A

Indirect:

10.15%

B:  Financial Instruments:

Resulting situation after the triggering transaction:

Type of financial instrument:

N/A

Expiration date:

N/A

Exercise/conversion period/date:

N/A

Number of voting rights that may be acquired

N/A

if the instrument is exercised/ converted:

% of voting rights:

N/A

Total (A+B):

Number of voting rights:

20,822,415

% of voting rights:

10.15%

9.

Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:

Held by Aberforth Partners LLP

Proxy Voting:

10.

Name of the proxy holder:

N/A

11.

Number of voting rights proxy holder will cease to hold:

N/A

12.

Date on which proxy holder will cease to hold voting rights:

N/A

13.

Additional information:

N/A

14.

Contact name:

Pauline Robson, Aberforth Partners LLP

15.

Contact telephone number:

0131 220 0733

16.

Contact name and telephone at issuer:

MARTYN WILLIAMS

Company Secretary

Ark Therapeutics Group plc

020 7388 7722