Aptitude Regulatory News (APTD)

TR-1: Notifications of Major Interests in Shares

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

2. Reason for the notification

YES

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 a 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 notification obligation: Aberforth Partners LLP

4. Full name of shareholder(s) (if different from 3): Nortrust Nominees Ltd

5. Date of transaction (and date on which the threshold is crossed or reached if different): 16/03/2017

6. Date on which issuer notified: 17/03/2017

7. Threshold(s) that is/are crossed or reached: 10%

8: Notified Details

A: Voting rights attached to shares

Class/type of shares Situation previous to the triggering transaction Resulting situation after the triggering transaction

If possible use ISIN code Number of shares Number of voting rights Number of shares Number of voting rights % of voting rights

Direct Indirect Direct Indirect

Ordinary 6,041,032 6,041,032 5,485,332 N/A 5,485,332 N/A 9.14

GB00BVVHWX30

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument Expiration date Exercise/ conversion period No. of voting rights that may be acquired if the instrument 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

Resulting situation after the triggering transaction

Type of financial instrument Expiration price Expiration date Exercise/ conversion period No. of voting rights instrument refers to % of voting rights

Nominal %

N/A N/A N/A N/A N/A N/A N/A

Total (A+B+C)

Number of voting rights Percentage of voting rights

5,485,332 9.14

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 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:

14. Contact name: Pauline Robson, Aberforth Partners LLP

15. Contact telephone name: 0131 220 0733