Mainstay Medical: Voting Rights Attached to Shares – Article 12(1) of Directive 2004/109/EC Financial Instruments – Article 11(3) of the Commission Directive 2007/14/EC

Regulatory News:

STANDARD FORM TR-1

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached : Mainstay Medical International plc

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

[X] an acquisition or disposal of voting rights

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

[X] an event changing the breakdown of voting rights

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

Fountain Healthcare Partners Fund 1, L.P.

4. Full name of shareholder(s) (if different from 3.): N?A

5. Date of the transaction and date on which the threshold is crossed or reached¹:

2 May 2014

6. Date on which issuer notified: 5 May 2014

7. Threshold(s) that is/are crossed or reached: 14.6%

8. Notified details:

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

10. In case of proxy voting: [name of proxy holder] will cease to hold [number] voting rights as of [date].

11. Additional information:

Done at [place] on [date]