IDEA.L Regulatory News (IDEA)

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

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

IDEAGEN PLC

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

An acquisition or disposal of voting rights

ü

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 thenotification obligation: iii

HARGREAVE HALE LIMITED

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

DISCRETIONARY CLIENTS

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

09 DECEMBER 2015

6. Date on which issuer notified:

10 DECEMBER 2015

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

10%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Indirect

Direct xi

Indirect xii

Direct

Indirect

GB00B0CM0C50

18,124,936

18,124,936

17,659,486

17,659,486

9.8734%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

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

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

17,659,486

9.8734%

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

11,511,470 of these shares are held for unit trusts operated by Marlborough Fund Managers Ltd, for whom Hargreave Hale Ltd manages the portfolio of investments on a discretionary basis. The remaining balance is held for other discretionary clients.

Proxy Voting:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will ceaseto hold:

12. Date on which proxy holder will cease to holdvoting rights:

13. Additional information:

14. Contact name:

David Clueit

Hargreave Hale Ltd

15. Contact telephone number:

01253 754739