Holding(s) in Company

For filings with the FSA 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 Oxford Instruments plc issuer of existing shares to which voting rights are attached: 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 result in the acquisition of shares already issued to which voting rights are attached An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments An event changing the breakdown of voting rights Other (please specify): 3. Full name of person(s) subject to Henderson Global Investors the notification obligation: iii 4. Full name of shareholder(s) (if different from 3.):iv 5. Date of the transaction and date 13 January 2015 on which the threshold is crossed or reached: v 6. Date on which issuer notified: 14 January 2015 7. Threshold(s) that is/are crossed Above 5% (please refer to section 13) or reached: vi, vii 8. Notified details: A: Voting rights attached to shares viii, ix Class/type of Situation previous Resulting situation after shares to the triggering the triggering transaction transaction if possible Number Number % of voting using Number of Number of rights x the ISIN CODE of Voting of voting Shares Rights shares rights ORD GBP0.05 Direct Direct Indirect Direct Indirect xi xii GB0006650450 2,857,222 2,857,222 2,868,280 5.00% B: Qualifying Financial Instruments Resulting situation after the triggering transaction Type of financial Expiration Exercise/ Number of voting % of voting instrument date xiii Conversion Period rights that may be rights xiv 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 Expiration Exercise/ Number of voting % of voting financial price date xvii Conversion rights instrument rights xix, xx instrument period refers to xviii Nominal Delta CFD 121,422 0.21% Total (A+B+C) Number of voting rights Percentage of voting rights 2,989,702 5.21% 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: This disclosure is due to an increase in ordinary share holding below the 5% threshold. The combined holding still remains within the 5% threshold level. 14. Contact name: Susan Johnson-Brett 15. Contact telephone number: 01865 393 200
UK 100

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