OCT.L Regulatory News (OCT)

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi 1. Identity of the issuer or the underlying issuerof existing shares to which voting rights are Octagonal plcattached:ii 2 Reason for the notification (please tick the appropriate box or boxes): An acquisition or disposal of voting rights X An acquisition or disposal of qualifying financial instruments which may resultin the acquisition of shares already issued to which voting rights are attached An acquisition or disposal of instruments with similar economic effect toqualifying financial instruments An event changing the breakdown of voting rights Other (please specify): 3. Full name of person(s) subject to the Mrs Viktoriia Maslennikovanotification obligation:iii 4. Full name of shareholder(s) Halb Nominees Limited (if different from 3.):iv 5. Date of the transaction and date onwhich the threshold is crossed or 10 September 2014reached: v 6. Date on which issuer notified: 10 September 2014 7. Threshold(s) that is/are crossed or 7%reached: vi, vii 8. Notified details: A: Voting rights attached to shares viii, ix Class/type Situation previous Resulting situation after the triggeringof to the triggering transactionshares transaction Number Number Number Number of voting % of votingif possible of of of shares rights rights xusing Shares Votingthe ISIN Rights Direct Direct xi Indirect Direct IndirectCODE xii Ordinaryshares 0.05pence 52,250,000 52,250,000 55,250,000 55,250,000 7.382% GB00BDD2DY82 B: Qualifying Financial Instruments Resulting situation after the triggering transaction Type of Expiration Exercise/ Number of voting % offinancial date xiii Conversion Period xiv rights that may be votinginstrument acquired if the rights instrument is exercised/ converted. C: Financial Instruments with similar economic effect to Qualifying FinancialInstruments xv, xvi Resulting situation after the triggering transaction Type of Exercise price Expiration Exercise/ Number of voting % of voting rightsfinancial date xvii Conversion rights xix, xxinstrument period instrument xviii refers to Nominal Delta Total (A+B+C) Number of voting rights Percentage of voting rights 55,250,000 7.382% 9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi Mrs Viktoriia Maslennikova has a beneficial interest in Octagonal plc, held byHalb Nominees Limited 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: James Holroyd 15. Contact telephone number: 0121 214 2307