Holdings in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi 1. Identity of the issuer or the underlying issuer Magnolia Petroleum Plcof existing shares to which voting rights are attached:ii GB00B1G3RY22 2 Reason for the notification (please tick the appropriate box or boxes): An acquisition or disposal of voting rights

Yes

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

An acquisition or disposal of instruments with similar economic effect to

n/a

qualifying financial instruments An event changing the breakdown of voting rights n/a Other (please specify): n/a 3. Full name of person(s) subject to the UBS Investment Bank notification obligation:iii 4. Full name of shareholder(s) UBS AG London Branch (if different from 3.):iv 5. Date of the transaction and date on which the threshold is crossed or 04 February 2013 reached: v 6. Date on which issuer notified: 06 February

2013

7. Threshold(s) that is/are crossed or 6% reached: vi, vii 8. Notified details: A: Voting rights attached to shares viii, ix Class/type Situation previous Resulting situation after the triggering transaction of to the triggering shares transaction Number Number Number Number of voting % of voting rights x if possible of of of shares rights using Shares Voting the ISIN Rights Direct Direct xi Indirect Direct Indirect CODE xii GB00B1G3RY22 63,000,000 63,000,000 50,000,000 50,000,000 - 5.88% - B: Qualifying Financial Instruments Resulting situation after the triggering transaction Type of Expiration Exercise/ Number of voting % of voting financial date xiii Conversion Period xiv rights that may be rights instrument acquired if the instrument is exercised/ converted. - - - - - C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi Resulting situation after the triggering transaction Type of Exercise price Expiration Exercise/ Number of voting rights % of voting rights financial date xvii Conversion instrument refers to xix, xx instrument period xviii 53,041,104 Nominal Delta Equity Swaps n/a 01 Apr 2016 at any time 6.79% - Total (A+B+C) Number of voting rights Percentage of voting rights 50,000,000 5.88%

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

Proxy Voting: 10. Name of the proxy holder: 11. Number of voting rights proxy holder will cease to hold: 12. Date on which proxy holder will cease to hold voting rights: 13. Additional information: 14. Contact name: Konstantina Georgaki / Zuzana Gorogova 15. Contact telephone number: +41 44 239 4071