8 August 2025

Oxford Instruments plc

(“Oxford Instruments” or the “Company”)

Transaction in Own Shares

Oxford Instruments announces that, in accordance with the terms of its share buyback programme announced on 25 June 2025 (the “Share Buyback Programme”), the Company purchased the following number of its own ordinary shares of 5p each through Numis Securities Limited (“Deutsche Numis”) for cancellation at an average price of 1785.6880 pence per share:

Date of purchase:

7 August 2025

Aggregate number of ordinary shares purchased:

1,314

Lowest price paid per share (GBp):

1778.0000

Highest price paid per share (GBp):

1800.0000

Volume weighted average price paid per share (GBp):

1785.6880

Subject to settlement of the above purchases and cancellation of the purchased ordinary shares, the Company’s total number of ordinary shares in issue shall be 57,574,165. The Company holds no shares in treasury and therefore the total number of voting rights in the Company will be 57,574,165. This figure for the total number of voting rights may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA’s Disclosure Guidance and Transparency Rules.

Aggregate information:

Venue

Weighted average price paid per share (GBp)

Aggregate number of shares purchased

London Stock Exchange

1785.6880

                                 1,314

Transaction Details:

In accordance with Article 5(1)(b) of the Market Abuse Regulation (EU) No. 596/2014 as it forms part of UK law, the table below contains detailed information of the individual trades made by Deutsche Numis on behalf of the Company as part of the Share Buyback Programme:

Number of ordinary shares purchased

Transaction price (GBp share)

Time of transaction (UK Time)

Transaction reference number

Trading venue

235

1782.00

 08:29:46

00076553703TRLO0

XLON

51

1778.00

 08:30:55

00076553768TRLO0

XLON

209

1778.00

 08:45:25

00076554204TRLO0

XLON

228

1782.00

 08:57:19

00076554504TRLO0

XLON

172

1782.00

 08:57:19

00076554505TRLO0

XLON

92

1782.00

 08:57:19

00076554506TRLO0

XLON

327

1800.00

 12:00:11

00076559792TRLO0

XLON

For further details:

Oxford Instruments plc

Stephen Lamacraft, Head of Investor Relations    Tel: +44 7776 433 916