Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi1. Identity of the issuer or the underlying issuer Magnolia Petroleum Plcof existing shares to which voting rights areattached:ii GB00B1G3RY222 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/aqualifying financial instrumentsAn event changing the breakdown of voting rights n/aOther (please specify): n/a3. Full name of person(s) subject to the UBS Investment Banknotification obligation:iii4. Full name of shareholder(s) UBS AG London Branch (if different from 3.):iv5. Date of the transaction and date onwhich the threshold is crossed or 11 February 2013reached: v6. Date on which issuer notified: 13 February 20137. Threshold(s) that is/are crossed or Below Notifiable Thresholdreached: vi, vii8. Notified details:A: Voting rights attached to shares viii, ix

Class/type Situation previous Resulting situation after the triggering transactionof

to the triggeringshares transaction Number Number Number Number of voting % of voting rights xif possible of of of shares rightsusing Shares Votingthe ISIN Rights Direct Direct xi Indirect Direct IndirectCODE xii Below Below Below Below BelowGB00B1G3RY22 30,500,000 30,500,000 Notifiable Notifiable Notifiable Notifiable Notifiable Threshold Threshold Threshold Threshold ThresholdB: Qualifying Financial InstrumentsResulting situation after the triggering transactionType of financial Expiration Exercise/ Number of voting % of votinginstrument date xiii Conversion Period xiv rights that may be rights acquired if the instrument is exercised/ converted.- - - - -C: Financial Instruments with similar economic effect to Qualifying FinancialInstruments xv, xviResulting situation after the triggering transactionType of Exercise Expiration Exercise/ Number of voting rights % of votingfinancial price date xvii Conversion instrument refers to rights xix, xxinstrument period xviii - Nominal Delta- - - - - -Total (A+B+C)Number of voting rights Percentage of voting rightsBelow Notifiable Threshold Below Notifiable Threshold

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

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: Konstantina Georgaki / Zuzana Gorogova15. Contact telephone number: +41 44 239 4071