Transaction in own shares

OSB GROUP PLC                                        
ISIN: GB00BLDRH360
07 October 2025

LEI number: 213800ZBKL9BHSL2K459

OSB GROUP PLC (the “Company”)
Transaction in Own Shares

The Company announces that on 06 October 2025 it had purchased a total of 90,432 of its ordinary shares of £0.01 each (the "ordinary shares") on the London Stock Exchange, CBOE BXE and CBOE CXE, through the Company's broker Citigroup Global Markets Limited as detailed below. The repurchased ordinary shares will be cancelled.

	London Stock Exchange	CBOE BXE	CBOE CXE
Number of ordinary shares purchased	90,432	-	-
Highest price paid (per ordinary share)	562.50p	-	-
Lowest price paid (per ordinary share)	554.00p	-	-
Volume weighted average price paid (per ordinary share)	557.30p	-	-

The purchases form part of the Company’s share buyback programme announced on 13 March 2025.

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 359,997,730 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 359,997,730.

In accordance with Article 5(1)(b) of Regulation (EU) No 596/2014 as incorporated into and implemented under English law (including by virtue of the European Union (Withdrawal) Act 2018), the detailed breakdown of individual trades made by Citigroup Global Markets Limited on behalf of the Company as part of the share buyback programme is set out below.

This announcement does not constitute, or form part of, an offer or any solicitation of an offer for securities in any jurisdiction.

Schedule of Purchases – Individual Transactions

Issuer Name	OSB GROUP PLC
LEI	213800ZBKL9BHSL2K459
ISIN	GB00BLDRH360
Intermediary Name	Citigroup Global Markets Limited
Intermediary Code	SBILGB2L
Timezone	GMT+1
Currency	GBP

Transaction Date	Trade Time	Currency	Volume	Price	Trading Venue	Transaction ID
06-10-2025	16:16:09	GBp	1	554.50	XLON	xeaNjEjrOaN
06-10-2025	16:15:56	GBp	1	554.50	XLON	xeaNjEjrOsD
06-10-2025	16:15:43	GBp	1	554.50	XLON	xeaNjEjrO6P
06-10-2025	16:15:33	GBp	1	554.50	XLON	xeaNjEjrOKs
06-10-2025	16:15:24	GBp	1	554.50	XLON	xeaNjEjrOSJ
06-10-2025	16:15:17	GBp	1	554.50	XLON	xeaNjEjrPdg
06-10-2025	16:15:05	GBp	52	554.50	XLON	xeaNjEjrPzb
06-10-2025	16:07:34	GBp	452	555.00	XLON	xeaNjEjrErP
06-10-2025	16:03:16	GBp	295	555.50	XLON	xeaNjEjrAvp
06-10-2025	15:57:06	GBp	454	556.00	XLON	xeaNjEjsqSX
06-10-2025	15:56:45	GBp	462	556.50	XLON	xeaNjEjsrq1
06-10-2025	15:55:08	GBp	203	556.50	XLON	xeaNjEjso34
06-10-2025	15:55:08	GBp	201	556.50	XLON	xeaNjEjso2p
06-10-2025	15:55:08	GBp	203	556.50	XLON	xeaNjEjso23
06-10-2025	15:55:08	GBp	201	556.50	XLON	xeaNjEjso28
06-10-2025	15:55:08	GBp	202	556.50	XLON	xeaNjEjso2I
06-10-2025	15:55:08	GBp	408	556.50	XLON	xeaNjEjso2R
06-10-2025	15:55:08	GBp	149	556.50	XLON	xeaNjEjso2T
06-10-2025	15:55:08	GBp	263	556.50	XLON	xeaNjEjso2V
06-10-2025	15:54:36	GBp	306	556.50	XLON	xeaNjEjsphl
06-10-2025	15:54:36	GBp	548	556.50	XLON	xeaNjEjsphn
06-10-2025	15:54:36	GBp	693	556.50	XLON	xeaNjEjsph0
06-10-2025	15:54:36	GBp	145	556.50	XLON	xeaNjEjsph2
06-10-2025	15:54:36	GBp	512	556.50	XLON	xeaNjEjsph4
06-10-2025	15:54:36	GBp	22	556.50	XLON	xeaNjEjsph6
06-10-2025	15:54:36	GBp	133	556.50	XLON	xeaNjEjsph8
06-10-2025	15:54:36	GBp	441	556.50	XLON	xeaNjEjsphA
06-10-2025	15:54:36	GBp	2,055	556.50	XLON	xeaNjEjsphK
06-10-2025	15:54:36	GBp	147	556.50	XLON	xeaNjEjsphO
06-10-2025	15:54:36	GBp	1,422	556.50	XLON	xeaNjEjsphQ
06-10-2025	15:54:36	GBp	277	556.50	XLON	xeaNjEjsphS
06-10-2025	15:54:36	GBp	258	556.50	XLON	xeaNjEjsphM
06-10-2025	15:54:36	GBp	97	556.50	XLON	xeaNjEjspgT
06-10-2025	15:54:36	GBp	250	556.50	XLON	xeaNjEjspgV
06-10-2025	15:54:36	GBp	534	556.50	XLON	xeaNjEjsprX
06-10-2025	15:54:36	GBp	285	556.50	XLON	xeaNjEjsprZ
06-10-2025	15:54:35	GBp	415	556.50	XLON	xeaNjEjspry
06-10-2025	15:54:35	GBp	1,175	556.00	XLON	xeaNjEjspsl
06-10-2025	15:53:02	GBp	228	556.50	XLON	xeaNjEjsnl4
06-10-2025	15:53:02	GBp	230	556.50	XLON	xeaNjEjsnlH
06-10-2025	15:53:02	GBp	67	556.50	XLON	xeaNjEjsnlJ
06-10-2025	15:53:02	GBp	263	556.50	XLON	xeaNjEjsnlL
06-10-2025	15:52:19	GBp	258	556.50	XLON	xeaNjEjsnV$
06-10-2025	15:52:19	GBp	424	556.50	XLON	xeaNjEjsnVx
06-10-2025	15:52:19	GBp	300	556.50	XLON	xeaNjEjsnVz
06-10-2025	15:52:19	GBp	42	556.50	XLON	xeaNjEjsnV8
06-10-2025	15:52:19	GBp	764	556.50	XLON	xeaNjEjsnVA
06-10-2025	15:52:19	GBp	150	556.50	XLON	xeaNjEjsnVG
06-10-2025	15:52:19	GBp	263	556.50	XLON	xeaNjEjsnVI
06-10-2025	15:22:10	GBp	383	555.00	XLON	xeaNjEjsQAC
06-10-2025	15:20:04	GBp	1,887	555.00	XLON	xeaNjEjsPed
06-10-2025	15:19:46	GBp	210	555.00	XLON	xeaNjEjsP5Z
06-10-2025	15:19:27	GBp	253	555.00	XLON	xeaNjEjsPVr
06-10-2025	15:18:35	GBp	1,209	555.00	XLON	xeaNjEjs7bo
06-10-2025	15:18:35	GBp	213	555.00	XLON	xeaNjEjs7dT
06-10-2025	15:18:35	GBp	35	555.00	XLON	xeaNjEjs7cZ
06-10-2025	15:18:35	GBp	422	555.00	XLON	xeaNjEjs7cl
06-10-2025	15:18:35	GBp	122	555.00	XLON	xeaNjEjs7cn
06-10-2025	15:18:35	GBp	545	555.00	XLON	xeaNjEjs7c5
06-10-2025	15:18:35	GBp	216	555.00	XLON	xeaNjEjs7cB
06-10-2025	15:18:34	GBp	31	555.00	XLON	xeaNjEjs7XY
06-10-2025	15:18:34	GBp	212	555.00	XLON	xeaNjEjs7Xe
06-10-2025	15:18:34	GBp	209	555.00	XLON	xeaNjEjs7Xo
06-10-2025	15:18:33	GBp	173	555.00	XLON	xeaNjEjs7X4
06-10-2025	15:18:33	GBp	1,261	555.00	XLON	xeaNjEjs7XF
06-10-2025	15:18:33	GBp	1,320	555.00	XLON	xeaNjEjs7XQ
06-10-2025	15:18:33	GBp	418	555.50	XLON	xeaNjEjs7W2
06-10-2025	15:18:33	GBp	515	555.00	XLON	xeaNjEjs7W9
06-10-2025	15:16:40	GBp	53	555.50	XLON	xeaNjEjs5iB
06-10-2025	15:16:39	GBp	349	555.50	XLON	xeaNjEjs5lY
06-10-2025	15:16:39	GBp	70	555.50	XLON	xeaNjEjs5l1
06-10-2025	15:16:39	GBp	272	555.50	XLON	xeaNjEjs5l3
06-10-2025	15:16:39	GBp	338	555.50	XLON	xeaNjEjs5lI
06-10-2025	15:16:39	GBp	346	555.50	XLON	xeaNjEjs5lU
06-10-2025	15:16:39	GBp	333	555.50	XLON	xeaNjEjs5ka
06-10-2025	15:16:39	GBp	333	555.50	XLON	xeaNjEjs5kn
06-10-2025	15:11:39	GBp	168	554.50	XLON	xeaNjEjsFVT
06-10-2025	15:11:39	GBp	893	554.50	XLON	xeaNjEjsFUk
06-10-2025	15:01:20	GBp	286	554.00	XLON	xeaNjEjtmg6
06-10-2025	15:01:04	GBp	874	554.00	XLON	xeaNjEjtmCP
06-10-2025	14:58:56	GBp	1,087	554.50	XLON	xeaNjEjt$nf
06-10-2025	14:56:06	GBp	1,650	555.00	XLON	xeaNjEjtxpr
06-10-2025	14:50:06	GBp	1,295	555.50	XLON	xeaNjEjtYSk
06-10-2025	14:46:18	GBp	1,371	556.00	XLON	xeaNjEjtlS6
06-10-2025	14:41:25	GBp	148	556.50	XLON	xeaNjEjtf8u
06-10-2025	14:41:25	GBp	704	556.50	XLON	xeaNjEjtf8w
06-10-2025	14:41:25	GBp	273	556.50	XLON	xeaNjEjtf8y
06-10-2025	14:41:11	GBp	1,859	557.00	XLON	xeaNjEjtMcO
06-10-2025	14:35:11	GBp	1,742	557.00	XLON	xeaNjEjtHUB
06-10-2025	14:32:05	GBp	635	557.00	XLON	xeaNjEjtRdc
06-10-2025	14:20:23	GBp	447	557.00	XLON	xeaNjEjtFkc
06-10-2025	14:20:23	GBp	375	557.50	XLON	xeaNjEjtFke
06-10-2025	14:20:23	GBp	1,215	557.50	XLON	xeaNjEjtFkn
06-10-2025	14:17:36	GBp	1,883	558.00	XLON	xeaNjEjtAku
06-10-2025	14:14:17	GBp	444	558.50	XLON	xeaNjEjt9wW
06-10-2025	14:14:17	GBp	515	558.00	XLON	xeaNjEjt9wd
06-10-2025	14:14:17	GBp	355	558.50	XLON	xeaNjEjt9wj
06-10-2025	14:05:37	GBp	621	558.00	XLON	xeaNjEjm@EJ
06-10-2025	14:05:37	GBp	230	558.50	XLON	xeaNjEjm@EO
06-10-2025	13:51:21	GBp	1,220	557.50	XLON	xeaNjEjmZLz
06-10-2025	13:45:17	GBp	268	558.00	XLON	xeaNjEjmiR1
06-10-2025	13:40:48	GBp	627	557.00	XLON	xeaNjEjmeLR
06-10-2025	13:40:48	GBp	1,431	557.50	XLON	xeaNjEjmeLS
06-10-2025	13:37:05	GBp	336	558.00	XLON	xeaNjEjmNT8
06-10-2025	13:34:57	GBp	674	558.00	XLON	xeaNjEjmL3l
06-10-2025	13:34:57	GBp	366	558.50	XLON	xeaNjEjmL3n
06-10-2025	13:33:07	GBp	259	558.50	XLON	xeaNjEjmJ@a
06-10-2025	13:33:06	GBp	227	558.50	XLON	xeaNjEjmJvx
06-10-2025	13:33:05	GBp	86	559.00	XLON	xeaNjEjmJ42
06-10-2025	13:33:05	GBp	141	559.00	XLON	xeaNjEjmJ49
06-10-2025	13:33:05	GBp	1,413	558.50	XLON	xeaNjEjmJ6x
06-10-2025	13:33:05	GBp	35	558.50	XLON	xeaNjEjmJ61
06-10-2025	13:33:05	GBp	990	558.50	XLON	xeaNjEjmJ6D
06-10-2025	13:33:05	GBp	250	558.50	XLON	xeaNjEjmJ6F
06-10-2025	13:33:05	GBp	42	558.50	XLON	xeaNjEjmJ6H
06-10-2025	13:33:05	GBp	362	558.50	XLON	xeaNjEjmJ6J
06-10-2025	13:33:05	GBp	652	558.50	XLON	xeaNjEjmJ6P
06-10-2025	13:32:59	GBp	201	558.00	XLON	xeaNjEjmJET
06-10-2025	13:32:59	GBp	434	558.50	XLON	xeaNjEjmJEV
06-10-2025	13:32:59	GBp	1,058	559.00	XLON	xeaNjEjmJ9W
06-10-2025	13:32:59	GBp	250	559.00	XLON	xeaNjEjmJ9j
06-10-2025	13:32:59	GBp	417	559.50	XLON	xeaNjEjmJ9l
06-10-2025	13:32:59	GBp	214	560.50	XLON	xeaNjEjmJ9m
06-10-2025	13:32:59	GBp	954	560.00	XLON	xeaNjEjmJ9t
06-10-2025	13:32:48	GBp	717	560.50	XLON	xeaNjEjmJSC
06-10-2025	13:32:48	GBp	324	560.50	XLON	xeaNjEjmJSE
06-10-2025	13:10:27	GBp	967	561.00	XLON	xeaNjEjm1KG
06-10-2025	13:08:53	GBp	204	560.50	XLON	xeaNjEjmEQ9
06-10-2025	13:08:53	GBp	516	560.50	XLON	xeaNjEjmEQA
06-10-2025	13:08:53	GBp	16	560.50	XLON	xeaNjEjmEQC
06-10-2025	13:08:53	GBp	162	560.00	XLON	xeaNjEjmEQJ
06-10-2025	12:59:30	GBp	32	560.00	XLON	xeaNjEjnsNs
06-10-2025	12:59:30	GBp	180	560.00	XLON	xeaNjEjnsNu
06-10-2025	12:59:30	GBp	533	560.00	XLON	xeaNjEjnsNw
06-10-2025	12:59:30	GBp	447	560.00	XLON	xeaNjEjnsNy
06-10-2025	12:59:30	GBp	68	560.00	XLON	xeaNjEjnsN2
06-10-2025	12:59:30	GBp	700	560.00	XLON	xeaNjEjnsN4
06-10-2025	12:59:30	GBp	394	559.50	XLON	xeaNjEjnsNA
06-10-2025	12:59:29	GBp	957	560.00	XLON	xeaNjEjnsMy
06-10-2025	11:47:30	GBp	4,578	558.00	XLON	xeaNjEjnE1O
06-10-2025	11:47:30	GBp	178	558.00	XLON	xeaNjEjnE1Q
06-10-2025	11:47:30	GBp	190	558.00	XLON	xeaNjEjnE1S
06-10-2025	11:47:30	GBp	607	557.50	XLON	xeaNjEjnE0Z
06-10-2025	11:40:09	GBp	206	556.50	XLON	xeaNjEjnB40
06-10-2025	10:56:28	GBp	805	555.50	XLON	xeaNjEjoGmd
06-10-2025	10:45:55	GBp	313	555.50	XLON	xeaNjEjoPL8
06-10-2025	10:45:55	GBp	3	555.50	XLON	xeaNjEjoPLA
06-10-2025	10:44:25	GBp	262	555.50	XLON	xeaNjEjo7da
06-10-2025	10:44:25	GBp	556	556.00	XLON	xeaNjEjo7dt
06-10-2025	10:41:33	GBp	848	556.50	XLON	xeaNjEjo5dT
06-10-2025	10:40:34	GBp	407	557.00	XLON	xeaNjEjo5QQ
06-10-2025	10:33:07	GBp	331	557.00	XLON	xeaNjEjoDvB
06-10-2025	10:33:01	GBp	443	557.00	XLON	xeaNjEjoDEs
06-10-2025	10:33:00	GBp	199	557.50	XLON	xeaNjEjoDE0
06-10-2025	10:33:00	GBp	1,511	557.50	XLON	xeaNjEjoDEA
06-10-2025	10:23:12	GBp	12	556.50	XLON	xeaNjEjpram
06-10-2025	10:17:12	GBp	245	557.00	XLON	xeaNjEjp@aR
06-10-2025	10:17:12	GBp	192	557.00	XLON	xeaNjEjp@aT
06-10-2025	10:14:51	GBp	204	557.00	XLON	xeaNjEjpyLe
06-10-2025	10:13:17	GBp	36	557.00	XLON	xeaNjEjpzEK
06-10-2025	10:13:17	GBp	168	557.00	XLON	xeaNjEjpzEM
06-10-2025	10:11:43	GBp	82	557.00	XLON	xeaNjEjpxaB
06-10-2025	10:11:43	GBp	81	557.00	XLON	xeaNjEjpxaD
06-10-2025	10:11:43	GBp	37	557.00	XLON	xeaNjEjpxaF
06-10-2025	10:06:32	GBp	126	557.00	XLON	xeaNjEjpdez
06-10-2025	10:06:32	GBp	181	557.00	XLON	xeaNjEjpde$
06-10-2025	10:06:32	GBp	513	557.00	XLON	xeaNjEjpde1
06-10-2025	10:06:32	GBp	700	557.00	XLON	xeaNjEjpde3
06-10-2025	10:06:32	GBp	366	556.50	XLON	xeaNjEjpdeG
06-10-2025	10:06:32	GBp	26	557.00	XLON	xeaNjEjpdeI
06-10-2025	10:06:32	GBp	406	557.00	XLON	xeaNjEjpdeK
06-10-2025	10:00:08	GBp	140	557.50	XLON	xeaNjEjpZS6
06-10-2025	10:00:08	GBp	333	557.50	XLON	xeaNjEjpZS8
06-10-2025	09:52:18	GBp	140	557.00	XLON	xeaNjEjpjeI
06-10-2025	09:52:18	GBp	307	557.00	XLON	xeaNjEjpjeK
06-10-2025	09:30:50	GBp	18	557.00	XLON	xeaNjEjpQVb
06-10-2025	09:26:02	GBp	451	557.00	XLON	xeaNjEjp6Q6
06-10-2025	09:26:02	GBp	20	557.00	XLON	xeaNjEjp6Q8
06-10-2025	09:18:41	GBp	274	557.50	XLON	xeaNjEjp0Mt
06-10-2025	09:16:21	GBp	146	558.00	XLON	xeaNjEjpEFJ
06-10-2025	09:16:21	GBp	250	558.00	XLON	xeaNjEjpEFL
06-10-2025	09:16:21	GBp	292	558.00	XLON	xeaNjEjpEFN
06-10-2025	09:16:21	GBp	327	557.50	XLON	xeaNjEjpEEg
06-10-2025	09:16:21	GBp	471	558.00	XLON	xeaNjEjpEEq
06-10-2025	08:46:50	GBp	473	559.00	XLON	xeaNjEjidhC
06-10-2025	08:41:11	GBp	250	560.00	XLON	xeaNjEjiZPr
06-10-2025	08:41:07	GBp	362	560.50	XLON	xeaNjEjiWiU
06-10-2025	08:40:45	GBp	557	561.00	XLON	xeaNjEjiWEN
06-10-2025	08:40:45	GBp	111	561.00	XLON	xeaNjEjiWEP
06-10-2025	08:39:57	GBp	341	562.00	XLON	xeaNjEjiXLE
06-10-2025	08:36:07	GBp	311	561.50	XLON	xeaNjEjiie6
06-10-2025	08:36:06	GBp	64	561.50	XLON	xeaNjEjiieU
06-10-2025	08:36:06	GBp	800	561.50	XLON	xeaNjEjiihW
06-10-2025	08:35:58	GBp	471	561.50	XLON	xeaNjEjiipe
06-10-2025	08:35:58	GBp	261	561.00	XLON	xeaNjEjiipl
06-10-2025	08:35:58	GBp	445	561.50	XLON	xeaNjEjiipn
06-10-2025	08:35:58	GBp	13	561.50	XLON	xeaNjEjiipp
06-10-2025	08:35:58	GBp	13	561.50	XLON	xeaNjEjiipr
06-10-2025	08:20:05	GBp	197	561.50	XLON	xeaNjEjiGvW
06-10-2025	08:17:23	GBp	327	562.00	XLON	xeaNjEjiUZN
06-10-2025	08:17:23	GBp	471	562.50	XLON	xeaNjEjiUZP
06-10-2025	08:02:58	GBp	107	562.00	XLON	xeaNjEji4KH
06-10-2025	08:02:58	GBp	460	562.00	XLON	xeaNjEji4KJ
06-10-2025	08:02:58	GBp	240	562.00	XLON	xeaNjEji4KL