Holding(s) in Company

About this update from Oxford Instruments Plc

TR-1: Standard form for notification of major holdings   NOTIFICATION OF MAJOR HOLDINGS (to be sent to the relevant issuer and to the FCA in Microsoft Word format if possible) i   1a. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached ii : Oxford Instruments Plc 1b. Please indicate if the issuer is a non-UK issuer   (please mark with an “X” if appropriate) Non-UK issuer   2. Reason for the notification (please mark the appropriate box or boxes with an “X”) An acquisition or disposal of voting rights X An acquisition or disposal of financial instruments   An event changing the breakdown of voting rights X Other (please specify) iii :   3. Details of person subject to the notification obligation iv Name Artemis Investment Management LLP City and country of registered office (if applicable) London , United Kingdom 4. Full name of shareholder(s) (if different from 3.) v Name   City and country of registered office (if applicable)   5. Date on which the threshold was crossed or reached vi : 24/03/2026 6. Date on which issuer notified (DD/MM/YYYY): 25/03/2026 7. Total positions of person(s) subject to the notification obligation   % of voting rights attached to shares (total of 8. A) % of voting rights through financial instruments (total of 8.B 1 + 8.B 2) Total of both in % (8.A + 8.B) Total number of voting rights held in issuer vii Resulting situation on the date on which threshold was crossed or reached 14.30931% 0.05872% 14.36803% 7,976,541.00 Position of previous notification (if applicable) 14.35220% 0.05865% 14.41086%             8. Notified details of the resulting situation on the date on which the threshold was crossed or reached viii A: Voting rights attached to shares Class/type of shares ISIN code (if possible) Number of voting rights ix % of voting rights Direct (DTR5.1) Indirect (DTR5.2.1) Direct (DTR5.1) Indirect (DTR5.2.1) Equity: GB0006650450   7,943,937.00   14.30931%           SUBTOTAL 8. A 7,943,937.00 14.30931%     B 1: Financial Instruments according to DTR5.3.1R (1) (a) Type of financial instrument Expiration date x Exercise/ Conversion Period xi Number of voting rights that may be acquired if the instrument is exercised/converted. % of voting rights               SUBTOTAL 8. B 1         B 2: Financial Instruments with similar economic effect according to DTR5.3.1R (1) (b) Type of financial instrument Expiration date x Exercise/ Conversion Period xi Physical or cash settlement xii Number of voting rights % of voting rights Equity Swap 12 th August 2026   Cash Settlement 32,604.00 0.05872%                   SUBTOTAL 8.B.2 32,604.00 0.05872%             9. Information in relation to the person subject to the notification obligation (please mark the applicable box with an “X”) Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuer xiii   Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entity xiv (please add additional rows as necessary) X Name xv % of voting rights if it equals or is higher than the notifiable threshold % of voting rights through financial instruments if it equals or is higher than the notifiable threshold Total of both if it equals or is higher than the notifiable threshold Artemis Investment Management LLP 14.30931% 0.05872% 14.36803% Artemis Fund Managers Limited 12.93458% 0.05872% 12.99331%   10. In case of proxy voting, please identify: Name of the proxy holder   The number and % of voting rights held   The date until which the voting rights will be held     11. Additional information xvi The actual number of voting rights held by Artemis Investment Management LLP is 7,943,937.00 or 14.30931% The Equity Swaps included in section 8B2 do not carry any voting rights.   Place of completion Edinburgh Date of completion 25/03/2026  

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