Holding(s) in Company

Oxford Instruments plc has been notified by Aviva plc of an acquisition of
voting rights.

Aviva plc and its subsidiaries has an interest in 2,460,553 Ordinary Shares of
5p each which, represents 5.00% of the issued share capital of the Company. The
number of voting rights is also 2,460,553 (1,858,795 direct and 601,758
indirect).

The Registered Holders of these shares are as follows:

BNY Norwich Union Nominees Limited 327,595*

Chase GA Group Nominees Limited 1,050,084*

Chase Nominees Limited 107,467*

CUIM Nominee Limited 346,445*

Vidacos Nominees Limited 27,2048*

Chase Nominees Limited 2,780

CUIM Nominee Limited 55,248

Vidacos Nominees Limited 543,730

* denotes direct interest