Director/PDMR Shareholding

NOTIFICATION OF TRANSACTIONS OF DIRECTORS' DEALINGS Oxford Instruments plc (the "Company") announces that the following director'sdealing took place: On 11 December 2013, Kevin Boyd acquired ordinary shares of 5p each in theCompany upon the exercise of approved options granted under the OxfordInstruments 2001 Executive Share Option Scheme "ESOS". All shares acquired inthis way were retained by the director. ESOS Options exercised and shares sold No. of Base option No. of Shares Shares options price shares sold retained exercised acquired Kevin Boyd 7,371 203.5p 7,371 nil 7,371 Finance Director Following this transaction, Kevin Boyd now holds the following number ofordinary shares of 5p in the Company:- Kevin Boyd Finance Director Interest in shares before 78,914notification Total interest in shares 86,285following this notification % of issued share capital 0.15% This notice is given in fulfilment of the obligations under DTR 3.1.4R(1) 11 December 2013 Susan Johnson-Brett Company Secretary Oxford Instruments plc Tel: 01865 393324

Email: susan.johnson-brett@oxinst.com