Ideagen : Holding (s) in Company

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

IDEAGEN PLC

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

An acquisition or disposal of voting rights

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

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

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

LIONTRUST INVESTMENT PARTNERS LLP

4. Full name of shareholder(s)

(if different from 3.):iv

N/A

5. Date of the transaction and date on which the threshold is crossed or reached: v

19/01/2017

6. Date on which issuer notified:

23/02/2017

7. Threshold(s) that is/are crossed or reached: vi,vii

11 %

8. Notified details:

A: Voting rights attached to shares viii,ix

Class/type of shares

if possible using the ISIN CODE

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of Shares

Number of Voting Rights

Number of shares

Number of voting rights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

GB00B0CM0C50

20,138,313

20,138,313

18,740,043

18,740,043

N/A

10.32%

N/A

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration datexiii

Exercise/ Conversion Period xiv

Number of voting rights that may be acquired if the instrument is exercised/ converted.

% of voting rights

N/A

N/A

N/A

N/A

N/A

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv,xvi

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration datexvii

Exercise/ Conversion period xviii

Number of voting rights instrument refers to

% of voting rightsxix, xx

N/A

N/A

N/A

N/A

N/A

Nominal

Delta

N/A

N/A

Total (A+B+C)

Number of voting rights

Percentage of voting rights

18,740,043

10.32%

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:

Please note that this is a late disclosure due to a system issue, Liontrust crossed the 11% threshold (to 10.99%) on the 19/01/2017 and then moved from 10.99% to 10.32% on the 22/02/2017.

14. Contact name:

Milly Porter

15. Contact telephone number:

020 7412 1702