Holding(s) in Company

For filings with the FCA include the annex For filings with issuer exclude the annex TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi 1. Identity of the issuer or the underlying issuerof existing shares to which voting rights are Fidessa Group plcattached:ii 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 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 The Capital Groupnotification obligation:iii Companies, Inc. 4. Full name of shareholder(s) See Schedule A (if different from 3.):iv 5. Date of the transaction and date onwhich the threshold is crossed or 8 April 2014reached: v 6. Date on which issuer notified: 9 April 2014 7. Threshold(s) that is/are crossed or Above 6%reached: vi, vii 8. Notified details: A: Voting rights attached to shares viii, ix Class/type of Situation previous Resulting situation after the triggeringshares to the triggering transaction transaction if possible using Number Number Number Number of voting % of voting rightsthe ISIN CODE of of of rights x Shares Voting shares Rights Direct Direct Indirect Direct Indirect xi xii Ordinary Shares 2,260,367 2,260,367 2,287,521 6.0287% (ISIN: GB0007590234) B: Qualifying Financial Instruments Resulting situation after the triggering transaction Type 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, xvi Resulting situation after the triggering transaction Type 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 rights 2,287,521 6.0287% 9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi See Schedule A 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: 15. Contact telephone number: Schedule A Number Percent of of Outstanding Shares The Capital Group Companies, Inc. ("CG") holdings 2,287,521 6.029% Holdings by CG Management Companies and Funds: • Capital Guardian Trust Company 768,479 2.025% • Capital International Limited 242,442 0.639% • Capital International SÁrl 36,600 0.096% • Capital Research and Management Company 1,240,000 3.268% • The Income Fund of America