Total Voting Rights

Oxford Instruments plc - Voting Rights and Capital Update The following notification is made in accordance with the FSA's Disclosure andTransparency Rules. Following the allotment of shares during the month the Company's issued sharecapital, as at the close of business on 31 May 2013, consisted of 56,927,839ordinary shares of 5p each with voting rights. The above figure (56,927,839) may be used by shareholders as the denominatorfor the calculations by which they will determine if they are required tonotify their interest in, or a change to their interest in, Oxford Instrumentsplc under the FSA's Disclosure and Transparency Rules. Susan Johnson-BrettCompany SecretaryOxford Instruments plc03 June 2013 Direct dial: 01865 393324Email: susan.johnson-brett@oxinst.com