Oxford Instruments Regulatory News (OXIG)

NOTIFICATION OF TRANSACTIONS OF DIRECTORS, PERSONS DISCHARGING MANAGERIALRESPONSIBILITY OR CONNECTED PERSONS

This form is intended for use by an issuer to make a RIS notification requiredby DR 3.3

(1) An issuer making a notification in respect of a transaction relating to theshares or debentures of the issuer should complete boxes 1 to 16, 23 and 24.

(2) An issuer making a notification in respect of a derivative relating theshares of the issuer should complete boxes 1 to 4, 6, 8, 13, 14, 16, 23 and 24.

(3) An issuer making a notification in respect of options granted to a director/person discharging managerial responsibilities should complete boxes 1 to 3and 17 to 24.

(4) An issuer making a notification in respect of a financial instrumentrelating to the shares of the issuer (other than a debenture) should completeboxes 1 to 4, 6, 8, 9, 11, 13, 14, 16, 23 and 24.

Please complete all relevant boxes should in block capital letters.

1. Name of the issuer 2. State whether the notification relates to (i) a transaction notified in accordance with DTR 3.1.2 R; (ii) a disclosure made in accordance with LR 9.8.6 R(1), or; (iii) a disclosure made in accordance with section 793 of the Companies act (2006) Oxford Instruments plc Statement (i) applies

3. Name of person discharging 4. State whether notification relates

managerial responsibilities/ to a person connected with a person director discharging managerial responsibilities/director named in 3 and identify the connected person 1. David Jonathan Flint 2. Kevin James Boyd 3. Charles John Arthur Holroyd

5. Indicate whether the notification 6. Description of shares (including

is in respect of a holding of the class), debentures or derivatives

person referred to in 3 or 4 or financial instruments relating above or in respect of a to shares non-beneficial interest

7. Name of registered shareholders 8 State the nature of the transaction

(s) and, if more than one, the number of shares held by each of them

9. Number of shares, debentures or 10. Percentage of issued class acquired

financial instruments relating to (treasury shares of that class

shares acquired should not be taken into account when calculating percentage)

11. Number of shares, debentures or 12. Percentage of issued class disposed

financial instruments relating to (treasury shares of that class

shares disposed should not be taken into account when calculating percentage) 13. Price per share or value of 14. Date and place of transaction transaction 15. Total holding following 16. Date issuer informed of

transaction

notification and total percentage holding following notification (any treasury shares should not be taken into account when calculating percentage)

If a person discharging managerial responsibilities has been granted options bythe issuer complete the following boxes

17 Date of grant 18. Period during which or date on which it can be exercised 19 December 2012 19 December 2015 - 13 December 2019 19. Total amount paid (if any) for 20. Description of shares or grant of the option debentures involved (class and number) nil Ordinary shares of 5p each 1. David Jonathan Flint: 15,100 2. Kevin James Boyd: 10,150 3. Charles John Arthur Holroyd: 7,550 21. Exercise price (if fixed at time 22. Total number of shares or of grant) or indication that debentures over which options

held

price is to be fixed at the time following notification of exercise nil 1. David Jonathan Flint: 246,400 Claire Louise Flint: 58,250 (connected person by way of marriage) 2. Kevin James Boyd: 176,071 3. Charles John Arthur Holroyd: 99,450 23. Any additional information 24. Name of contact and telephone number for queries The vesting of options will be Susan Johnson-Brett subject to the Company meeting a TSR performance condition 01865 393324 measured over a three year period. Name and signature of duly authorised officer of issuer responsible for making notification Susan Johnson-Brett, Company Secretary __________________________________________________________

Date of notification 19 December 2012