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 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.):iv 5. Date of the transaction and date onwhich the threshold is crossed or 06 February2013reached: v 6. Date on which issuer notified: 08 February

2013

7. Threshold(s) that is/are crossed or 4% reached: vi, vii8. Notified details: A: Voting rights attached to shares viii, ixClass/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 xiiGB00B1G3RY22 50,000,000 50,000,000 30,500,000 30,500,000 - 3.59% - B: Qualifying Financial InstrumentsResulting situation after the triggering transaction Type of Expiration Exercise/ Number of voting % of votingfinancial date xiii Conversion Period xiv rights that may be rightsinstrument acquired if the instrument is exercised/ converted.- - - - -C: Financial Instruments with similar economic effect to Qualifying FinancialInstruments xv, xvi Resulting situation after the triggering transactionType of Exercise price Expiration Exercise/ Number of voting rights % of voting rightsfinancial date xvii Conversion instrument refers to xix, xxinstrument period xviii 53,041,104 Nominal DeltaEquity Swaps n/a 01 Apr 2016 at any time 6.79% -Total (A+B+C)Number of voting rights Percentage of voting rights30,500,000 3.59%

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 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