Transaction in Own Shares

22 December 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 Deutsche Bank AG, London Branch (trading for these purposes as Deutsche Numis) (“Deutsche Numis”) for cancellation at an average price of 2085.6825 pence per share:

Date of purchase:	19 December 2025
Aggregate number of ordinary shares purchased:	12,000
Lowest price paid per share (GBp):	2070.0000
Highest price paid per share (GBp):	2095.0000
Volume weighted average price paid per share (GBp):	2085.6825

Following settlement of the above purchases and cancellation of the purchased ordinary shares, the Company’s total number of ordinary shares in issue shall be 56,140,628. The Company holds no shares in treasury and therefore the total number of voting rights in the Company will be 56,140,628. 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	2085.6825	12,000

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
340	2080.00	08:28:01	00078444798TRLO0	XLON
327	2090.00	09:19:16	00078446205TRLO0	XLON
58	2085.00	09:19:17	00078446206TRLO0	XLON
3	2085.00	09:19:17	00078446207TRLO0	XLON
1	2090.00	10:15:00	00078447413TRLO0	XLON
2	2095.00	10:15:33	00078447535TRLO0	XLON
2225	2095.00	10:15:33	00078447537TRLO0	XLON
1	2095.00	10:15:33	00078447536TRLO0	XLON
375	2085.00	10:17:10	00078447594TRLO0	XLON
326	2080.00	10:30:45	00078447820TRLO0	XLON
332	2080.00	10:30:45	00078447821TRLO0	XLON
68	2075.00	10:34:22	00078447866TRLO0	XLON
17	2075.00	10:49:59	00078448153TRLO0	XLON
1	2075.00	10:49:59	00078448154TRLO0	XLON
1	2075.00	10:58:33	00078448574TRLO0	XLON
15	2075.00	10:58:33	00078448573TRLO0	XLON
216	2075.00	11:06:37	00078448712TRLO0	XLON
12	2075.00	11:06:37	00078448711TRLO0	XLON
375	2070.00	11:13:57	00078448850TRLO0	XLON
9	2070.00	11:56:23	00078449658TRLO0	XLON
1	2070.00	11:56:23	00078449659TRLO0	XLON
8	2070.00	12:18:48	00078450187TRLO0	XLON
489	2075.00	12:32:59	00078450476TRLO0	XLON
1	2070.00	12:45:58	00078450606TRLO0	XLON
11	2070.00	12:45:58	00078450605TRLO0	XLON
360	2080.00	13:06:52	00078450968TRLO0	XLON
67	2080.00	13:13:12	00078451110TRLO0	XLON
84	2080.00	13:13:12	00078451109TRLO0	XLON
8	2080.00	13:13:12	00078451111TRLO0	XLON
40	2080.00	13:17:22	00078451156TRLO0	XLON
40	2080.00	13:17:22	00078451157TRLO0	XLON
55	2080.00	13:17:23	00078451158TRLO0	XLON
379	2080.00	13:22:23	00078451217TRLO0	XLON
1	2080.00	13:22:23	00078451216TRLO0	XLON
100	2080.00	13:37:23	00078451410TRLO0	XLON
74	2080.00	13:37:23	00078451409TRLO0	XLON
3	2080.00	13:53:07	00078451679TRLO0	XLON
4	2080.00	13:56:08	00078451732TRLO0	XLON
4	2080.00	13:56:08	00078451731TRLO0	XLON
348	2080.00	13:56:08	00078451733TRLO0	XLON
74	2085.00	14:10:52	00078452124TRLO0	XLON
159	2085.00	14:10:52	00078452123TRLO0	XLON
18	2080.00	14:11:00	00078452127TRLO0	XLON
78	2080.00	14:14:58	00078452231TRLO0	XLON
68	2080.00	14:14:58	00078452233TRLO0	XLON
155	2080.00	14:14:58	00078452232TRLO0	XLON
53	2085.00	14:30:48	00078452688TRLO0	XLON
52	2085.00	14:30:48	00078452687TRLO0	XLON
141	2085.00	14:31:03	00078452742TRLO0	XLON
188	2085.00	14:31:03	00078452741TRLO0	XLON
112	2095.00	14:46:41	00078454085TRLO0	XLON
247	2095.00	14:46:41	00078454084TRLO0	XLON
369	2095.00	14:54:48	00078454566TRLO0	XLON
300	2090.00	15:03:27	00078455145TRLO0	XLON
131	2095.00	15:11:45	00078455753TRLO0	XLON
256	2095.00	15:17:31	00078455977TRLO0	XLON
66	2095.00	15:17:31	00078455982TRLO0	XLON
252	2095.00	15:17:31	00078455981TRLO0	XLON
56	2095.00	15:17:31	00078455984TRLO0	XLON
4	2095.00	15:17:31	00078455983TRLO0	XLON
299	2095.00	15:17:31	00078455985TRLO0	XLON
32	2095.00	15:17:31	00078455986TRLO0	XLON
358	2090.00	15:24:56	00078456204TRLO0	XLON
18	2090.00	15:24:56	00078456203TRLO0	XLON
393	2080.00	15:56:41	00078457385TRLO0	XLON
325	2080.00	15:56:41	00078457384TRLO0	XLON
304	2080.00	16:06:46	00078458132TRLO0	XLON
29	2080.00	16:06:50	00078458134TRLO0	XLON
359	2080.00	16:09:55	00078458276TRLO0	XLON
323	2080.00	16:09:55	00078458277TRLO0	XLON

For further details:

Oxford Instruments plc

Stephen Lamacraft, Head of Investor Relations         Tel: [phone]

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