OSB GROUP PLC - Transaction in Own Shares

OSB GROUP PLC                                        
ISIN: GB00BLDRH360
16 October 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 15 October 2025 it had purchased a total of 91,320 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	91,320	-	-
Highest price paid (per ordinary share)	563.00p	-	-
Lowest price paid (per ordinary share)	553.50p	-	-
Volume weighted average price paid (per ordinary share)	558.84p	-	-

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 359,427,941 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 359,427,941.

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
15-10-2025	16:28:46	GBp	1,256	558.00	XLON	xHaNld7fLfJ
15-10-2025	16:28:46	GBp	16	558.00	XLON	xHaNld7fLfP
15-10-2025	16:28:46	GBp	500	558.00	XLON	xHaNld7fLfR
15-10-2025	16:28:43	GBp	465	558.00	XLON	xHaNld7fLt$
15-10-2025	16:28:42	GBp	500	558.00	XLON	xHaNld7fLs6
15-10-2025	16:28:42	GBp	70	558.00	XLON	xHaNld7fLnH
15-10-2025	16:28:41	GBp	430	558.00	XLON	xHaNld7fLmt
15-10-2025	16:28:41	GBp	430	558.00	XLON	xHaNld7fLmU
15-10-2025	16:28:30	GBp	23	558.00	XLON	xHaNld7fLGa
15-10-2025	16:26:49	GBp	882	558.00	XLON	xHaNld7fGnf
15-10-2025	16:24:48	GBp	23	558.00	XLON	xHaNld7fVon
15-10-2025	16:14:45	GBp	273	558.00	XLON	xHaNld7fEeR
15-10-2025	16:13:51	GBp	804	558.50	XLON	xHaNld7fFLi
15-10-2025	16:13:51	GBp	1,835	559.00	XLON	xHaNld7fFLo
15-10-2025	16:13:50	GBp	191	559.50	XLON	xHaNld7fFNu
15-10-2025	16:13:29	GBp	337	559.50	XLON	xHaNld7fCnb
15-10-2025	16:13:29	GBp	337	559.50	XLON	xHaNld7fCnu
15-10-2025	16:13:29	GBp	2	559.50	XLON	xHaNld7fCnw
15-10-2025	16:12:20	GBp	95	559.50	XLON	xHaNld7fAh$
15-10-2025	16:12:20	GBp	384	559.50	XLON	xHaNld7fAhz
15-10-2025	16:12:00	GBp	321	559.50	XLON	xHaNld7fATZ
15-10-2025	16:11:09	GBp	862	559.50	XLON	xHaNld7f8jl
15-10-2025	16:11:09	GBp	27	559.50	XLON	xHaNld7f8jH
15-10-2025	16:04:00	GBp	1,087	559.00	XLON	xHaNld7g@dU
15-10-2025	16:03:50	GBp	967	559.50	XLON	xHaNld7g@ea
15-10-2025	16:03:50	GBp	638	559.50	XLON	xHaNld7g@ei
15-10-2025	16:03:50	GBp	287	559.50	XLON	xHaNld7g@ek
15-10-2025	16:03:50	GBp	1,087	559.50	XLON	xHaNld7g@eu
15-10-2025	15:55:43	GBp	125	560.50	XLON	xHaNld7gY6K
15-10-2025	15:55:43	GBp	44	560.50	XLON	xHaNld7gY6M
15-10-2025	15:55:43	GBp	128	560.50	XLON	xHaNld7gY6O
15-10-2025	15:55:43	GBp	1,087	560.00	XLON	xHaNld7gY1W
15-10-2025	15:50:08	GBp	1,215	560.50	XLON	xHaNld7gh4C
15-10-2025	15:41:15	GBp	87	560.50	XLON	xHaNld7gT0U
15-10-2025	15:41:15	GBp	857	560.50	XLON	xHaNld7gT3W
15-10-2025	15:41:13	GBp	233	560.50	XLON	xHaNld7gTDz
15-10-2025	15:40:16	GBp	242	561.00	XLON	xHaNld7gRap
15-10-2025	15:40:16	GBp	579	561.00	XLON	xHaNld7gRar
15-10-2025	15:40:16	GBp	293	561.00	XLON	xHaNld7gRat
15-10-2025	15:40:16	GBp	917	561.00	XLON	xHaNld7gRav
15-10-2025	15:40:16	GBp	84	561.00	XLON	xHaNld7gRax
15-10-2025	15:40:16	GBp	197	561.00	XLON	xHaNld7gRaz
15-10-2025	15:40:16	GBp	575	561.00	XLON	xHaNld7gRa$
15-10-2025	15:40:16	GBp	348	561.00	XLON	xHaNld7gRa1
15-10-2025	15:40:16	GBp	352	561.00	XLON	xHaNld7gRa8
15-10-2025	15:40:16	GBp	128	560.50	XLON	xHaNld7gRaE
15-10-2025	15:40:16	GBp	959	560.50	XLON	xHaNld7gRaG
15-10-2025	15:38:44	GBp	437	561.00	XLON	xHaNld7gPCR
15-10-2025	15:25:26	GBp	418	561.50	XLON	xHaNld7hmsd
15-10-2025	15:25:26	GBp	3	561.50	XLON	xHaNld7hmsf
15-10-2025	15:25:26	GBp	420	561.50	XLON	xHaNld7hms5
15-10-2025	15:25:26	GBp	420	561.50	XLON	xHaNld7hmsT
15-10-2025	15:25:26	GBp	413	561.50	XLON	xHaNld7hmny
15-10-2025	15:25:26	GBp	402	561.50	XLON	xHaNld7hmnM
15-10-2025	15:25:25	GBp	1	561.50	XLON	xHaNld7hmoe
15-10-2025	15:25:25	GBp	28	561.50	XLON	xHaNld7hmog
15-10-2025	15:25:25	GBp	1	561.50	XLON	xHaNld7hmoi
15-10-2025	15:25:25	GBp	11	561.50	XLON	xHaNld7hmok
15-10-2025	15:25:25	GBp	379	561.50	XLON	xHaNld7hmom
15-10-2025	15:25:25	GBp	107	561.50	XLON	xHaNld7hmos
15-10-2025	15:16:02	GBp	123	561.00	XLON	xHaNld7hYHi
15-10-2025	15:16:02	GBp	76	561.00	XLON	xHaNld7hYHk
15-10-2025	15:16:02	GBp	332	561.00	XLON	xHaNld7hYHs
15-10-2025	15:16:02	GBp	40	561.00	XLON	xHaNld7hYHu
15-10-2025	15:15:59	GBp	184	561.00	XLON	xHaNld7hYT8
15-10-2025	15:15:59	GBp	2,429	561.00	XLON	xHaNld7hYTE
15-10-2025	15:15:55	GBp	1	561.00	XLON	xHaNld7hYRX
15-10-2025	15:15:55	GBp	3	561.00	XLON	xHaNld7hYRZ
15-10-2025	15:15:55	GBp	24	561.00	XLON	xHaNld7hYRb
15-10-2025	15:15:55	GBp	5	561.00	XLON	xHaNld7hYRd
15-10-2025	15:15:55	GBp	802	561.00	XLON	xHaNld7hYOV
15-10-2025	15:15:55	GBp	828	561.00	XLON	xHaNld7hYRB
15-10-2025	15:15:55	GBp	1,087	560.00	XLON	xHaNld7hYRS
15-10-2025	15:11:56	GBp	581	560.50	XLON	xHaNld7hiG4
15-10-2025	15:11:56	GBp	506	560.50	XLON	xHaNld7hiG6
15-10-2025	14:46:18	GBp	1,013	560.00	XLON	xHaNld7aooH
15-10-2025	14:46:14	GBp	364	561.00	XLON	xHaNld7ao@w
15-10-2025	14:46:14	GBp	700	561.00	XLON	xHaNld7ao@y
15-10-2025	14:46:14	GBp	374	560.50	XLON	xHaNld7ao@@
15-10-2025	14:46:14	GBp	274	560.50	XLON	xHaNld7ao@0
15-10-2025	14:46:14	GBp	9	560.50	XLON	xHaNld7ao@2
15-10-2025	14:46:14	GBp	1,926	560.50	XLON	xHaNld7ao@9
15-10-2025	14:46:14	GBp	1,087	560.50	XLON	xHaNld7ao@C
15-10-2025	14:32:46	GBp	1,087	561.00	XLON	xHaNld7aiB4
15-10-2025	14:17:34	GBp	378	561.00	XLON	xHaNld7aPYa
15-10-2025	14:17:34	GBp	865	561.50	XLON	xHaNld7aPYs
15-10-2025	14:13:45	GBp	729	561.00	XLON	xHaNld7a5RP
15-10-2025	14:11:20	GBp	1,424	561.00	XLON	xHaNld7a1hH
15-10-2025	14:11:00	GBp	220	561.50	XLON	xHaNld7a182
15-10-2025	14:10:06	GBp	235	561.50	XLON	xHaNld7aECV
15-10-2025	14:09:56	GBp	2	561.50	XLON	xHaNld7aEVn
15-10-2025	14:09:56	GBp	221	561.50	XLON	xHaNld7aEVp
15-10-2025	14:09:56	GBp	184	561.50	XLON	xHaNld7aEVv
15-10-2025	14:09:55	GBp	1,926	561.50	XLON	xHaNld7aEUE
15-10-2025	14:09:55	GBp	21	561.50	XLON	xHaNld7aEUG
15-10-2025	14:09:55	GBp	71	561.50	XLON	xHaNld7aEUI
15-10-2025	14:09:55	GBp	333	561.50	XLON	xHaNld7aEUU
15-10-2025	14:09:55	GBp	390	561.50	XLON	xHaNld7aEPi
15-10-2025	14:09:55	GBp	259	561.50	XLON	xHaNld7aEPk
15-10-2025	14:09:55	GBp	939	561.00	XLON	xHaNld7aEPr
15-10-2025	14:01:02	GBp	915	560.00	XLON	xHaNld7bqnd
15-10-2025	13:29:24	GBp	1,102	558.00	XLON	xHaNld7bKlN
15-10-2025	13:21:12	GBp	1,043	558.50	XLON	xHaNld7bVz9
15-10-2025	13:18:30	GBp	199	558.50	XLON	xHaNld7bQl1
15-10-2025	13:18:19	GBp	236	559.00	XLON	xHaNld7bQrp
15-10-2025	13:18:19	GBp	2	559.00	XLON	xHaNld7bQrr
15-10-2025	13:18:19	GBp	184	559.00	XLON	xHaNld7bQrw
15-10-2025	13:18:19	GBp	2,983	559.00	XLON	xHaNld7bQr4
15-10-2025	13:18:19	GBp	221	559.00	XLON	xHaNld7bQrA
15-10-2025	13:18:19	GBp	7	559.00	XLON	xHaNld7bQrM
15-10-2025	13:18:19	GBp	82	559.00	XLON	xHaNld7bQrO
15-10-2025	13:18:19	GBp	193	559.00	XLON	xHaNld7bQrQ
15-10-2025	13:18:15	GBp	370	558.50	XLON	xHaNld7bQnU
15-10-2025	13:18:15	GBp	259	559.00	XLON	xHaNld7bQmZ
15-10-2025	13:18:15	GBp	308	559.00	XLON	xHaNld7bQmb
15-10-2025	13:18:15	GBp	741	558.50	XLON	xHaNld7bQml
15-10-2025	13:00:01	GBp	27	558.00	XLON	xHaNld7b8Cd
15-10-2025	12:59:01	GBp	32	558.00	XLON	xHaNld7csZ2
15-10-2025	12:49:31	GBp	103	557.00	XLON	xHaNld7c$rr
15-10-2025	12:49:31	GBp	625	557.00	XLON	xHaNld7c$rt
15-10-2025	12:29:34	GBp	604	557.50	XLON	xHaNld7cjX2
15-10-2025	12:29:34	GBp	609	557.50	XLON	xHaNld7cjX8
15-10-2025	12:15:30	GBp	91	557.50	XLON	xHaNld7cHMc
15-10-2025	12:06:24	GBp	867	557.50	XLON	xHaNld7c6aK
15-10-2025	12:06:20	GBp	55	558.00	XLON	xHaNld7c6WW
15-10-2025	12:06:20	GBp	165	558.00	XLON	xHaNld7c6WY
15-10-2025	12:05:09	GBp	297	558.00	XLON	xHaNld7c6Ou
15-10-2025	12:00:03	GBp	346	555.50	XLON	xHaNld7c3Pj
15-10-2025	12:00:00	GBp	223	556.00	XLON	xHaNld7c0Z$
15-10-2025	11:59:59	GBp	217	556.00	XLON	xHaNld7c0rd
15-10-2025	11:59:59	GBp	200	556.00	XLON	xHaNld7c0rI
15-10-2025	11:59:59	GBp	270	556.00	XLON	xHaNld7c0rK
15-10-2025	11:59:59	GBp	461	555.50	XLON	xHaNld7c0qX
15-10-2025	11:46:53	GBp	462	556.00	XLON	xHaNld7dtt@
15-10-2025	11:46:53	GBp	250	556.00	XLON	xHaNld7dtt0
15-10-2025	11:46:53	GBp	531	556.00	XLON	xHaNld7dtt2
15-10-2025	11:35:09	GBp	821	555.50	XLON	xHaNld7dzbY
15-10-2025	11:23:49	GBp	161	555.50	XLON	xHaNld7dZrc
15-10-2025	11:23:48	GBp	111	555.50	XLON	xHaNld7dZru
15-10-2025	11:21:31	GBp	328	556.00	XLON	xHaNld7dXoA
15-10-2025	11:18:17	GBp	396	556.00	XLON	xHaNld7di5I
15-10-2025	11:17:58	GBp	3	556.00	XLON	xHaNld7diIh
15-10-2025	11:17:57	GBp	242	556.00	XLON	xHaNld7diIp
15-10-2025	11:17:56	GBp	26	557.00	XLON	xHaNld7diIR
15-10-2025	11:17:56	GBp	204	557.00	XLON	xHaNld7diIT
15-10-2025	11:17:56	GBp	551	557.00	XLON	xHaNld7diIJ
15-10-2025	11:17:56	GBp	183	557.00	XLON	xHaNld7diIL
15-10-2025	11:17:56	GBp	171	557.00	XLON	xHaNld7diIN
15-10-2025	11:17:56	GBp	186	557.00	XLON	xHaNld7diIP
15-10-2025	11:17:56	GBp	331	557.00	XLON	xHaNld7diTi
15-10-2025	11:17:56	GBp	435	556.50	XLON	xHaNld7diTo
15-10-2025	11:15:05	GBp	74	557.00	XLON	xHaNld7deZr
15-10-2025	11:15:05	GBp	186	557.00	XLON	xHaNld7deZt
15-10-2025	11:15:05	GBp	131	557.00	XLON	xHaNld7deZx
15-10-2025	11:15:05	GBp	465	557.00	XLON	xHaNld7deZ3
15-10-2025	10:52:46	GBp	1,015	558.00	XLON	xHaNld7d0Bc
15-10-2025	10:52:46	GBp	53	558.00	XLON	xHaNld7d0Be
15-10-2025	10:52:46	GBp	123	558.00	XLON	xHaNld7d0Bg
15-10-2025	10:52:46	GBp	193	558.00	XLON	xHaNld7d0Bi
15-10-2025	10:52:46	GBp	435	557.50	XLON	xHaNld7d0Bv
15-10-2025	10:43:58	GBp	692	558.00	XLON	xHaNld7d9tk
15-10-2025	10:43:58	GBp	135	558.00	XLON	xHaNld7d9tt
15-10-2025	10:43:58	GBp	147	558.00	XLON	xHaNld7d9tv
15-10-2025	10:43:58	GBp	316	558.00	XLON	xHaNld7d9t6
15-10-2025	10:35:06	GBp	83	557.00	XLON	xHaNld7WnzQ
15-10-2025	10:35:06	GBp	354	557.00	XLON	xHaNld7WnzV
15-10-2025	10:35:06	GBp	13	557.00	XLON	xHaNld7WnyZ
15-10-2025	10:20:05	GBp	456	555.00	XLON	xHaNld7WXKY
15-10-2025	10:17:55	GBp	228	555.50	XLON	xHaNld7WlV8
15-10-2025	10:17:45	GBp	71	556.00	XLON	xHaNld7Wiaa
15-10-2025	10:17:45	GBp	309	556.00	XLON	xHaNld7WiaY
15-10-2025	10:17:41	GBp	80	557.00	XLON	xHaNld7Wic9
15-10-2025	10:17:41	GBp	523	557.00	XLON	xHaNld7WicB
15-10-2025	10:17:41	GBp	179	557.00	XLON	xHaNld7WicD
15-10-2025	10:17:41	GBp	435	556.50	XLON	xHaNld7WicI
15-10-2025	10:05:36	GBp	300	556.00	XLON	xHaNld7WUjg
15-10-2025	10:05:36	GBp	333	555.50	XLON	xHaNld7WUjn
15-10-2025	09:53:38	GBp	302	553.50	XLON	xHaNld7W0Zr
15-10-2025	09:53:37	GBp	1	553.50	XLON	xHaNld7W0Y$
15-10-2025	09:53:37	GBp	438	554.00	XLON	xHaNld7W0Y0
15-10-2025	09:53:35	GBp	48	554.50	XLON	xHaNld7W0iX
15-10-2025	09:53:35	GBp	627	555.00	XLON	xHaNld7W0jP
15-10-2025	09:53:35	GBp	172	555.00	XLON	xHaNld7W0jR
15-10-2025	09:53:35	GBp	575	555.00	XLON	xHaNld7W0jT
15-10-2025	09:53:35	GBp	78	555.00	XLON	xHaNld7W0jV
15-10-2025	09:53:35	GBp	435	554.00	XLON	xHaNld7W0if
15-10-2025	09:34:48	GBp	283	554.50	XLON	xHaNld7Xyfy
15-10-2025	09:31:10	GBp	349	556.00	XLON	xHaNld7XucK
15-10-2025	09:29:30	GBp	275	556.50	XLON	xHaNld7XvKa
15-10-2025	09:29:18	GBp	545	557.00	XLON	xHaNld7XvSd
15-10-2025	09:27:26	GBp	422	557.50	XLON	xHaNld7Xd1E
15-10-2025	09:27:26	GBp	194	557.50	XLON	xHaNld7Xd1G
15-10-2025	09:27:26	GBp	117	557.50	XLON	xHaNld7Xd1I
15-10-2025	09:27:26	GBp	1,031	557.00	XLON	xHaNld7Xd1O
15-10-2025	09:27:26	GBp	26	557.00	XLON	xHaNld7Xd1Q
15-10-2025	09:27:19	GBp	570	556.50	XLON	xHaNld7XdDs
15-10-2025	09:27:19	GBp	165	556.50	XLON	xHaNld7XdDu
15-10-2025	09:13:11	GBp	9	556.00	XLON	xHaNld7Xfjl
15-10-2025	09:13:11	GBp	35	556.00	XLON	xHaNld7Xfjn
15-10-2025	09:13:11	GBp	340	556.00	XLON	xHaNld7Xfjp
15-10-2025	09:07:04	GBp	368	555.00	XLON	xHaNld7XI2B
15-10-2025	09:07:04	GBp	573	554.50	XLON	xHaNld7XI2E
15-10-2025	09:07:03	GBp	53	556.00	XLON	xHaNld7XIDA
15-10-2025	09:07:03	GBp	216	556.00	XLON	xHaNld7XIDF
15-10-2025	09:07:03	GBp	435	555.00	XLON	xHaNld7XIDK
15-10-2025	09:00:23	GBp	252	556.00	XLON	xHaNld7XSgY
15-10-2025	09:00:22	GBp	51	556.00	XLON	xHaNld7XSgu
15-10-2025	09:00:22	GBp	435	556.50	XLON	xHaNld7XSgz
15-10-2025	08:45:24	GBp	252	554.50	XLON	xHaNld7X0ld
15-10-2025	08:45:24	GBp	1	554.50	XLON	xHaNld7X0lf
15-10-2025	08:45:22	GBp	451	555.00	XLON	xHaNld7X0lQ
15-10-2025	08:45:21	GBp	705	555.50	XLON	xHaNld7X0k1
15-10-2025	08:43:12	GBp	435	556.00	XLON	xHaNld7XEbD
15-10-2025	08:36:53	GBp	50	556.50	XLON	xHaNld7XB1W
15-10-2025	08:36:53	GBp	205	556.50	XLON	xHaNld7XB1Y
15-10-2025	08:36:53	GBp	38	556.50	XLON	xHaNld7XB1d
15-10-2025	08:36:53	GBp	350	557.00	XLON	xHaNld7XB1f
15-10-2025	08:33:39	GBp	280	557.50	XLON	xHaNld7Ys$H
15-10-2025	08:33:39	GBp	21	557.50	XLON	xHaNld7Ys$J
15-10-2025	08:33:20	GBp	256	558.00	XLON	xHaNld7YsCq
15-10-2025	08:26:39	GBp	612	558.00	XLON	xHaNld7Ym0W
15-10-2025	08:26:39	GBp	429	557.50	XLON	xHaNld7Ym1U
15-10-2025	08:23:24	GBp	132	559.00	XLON	xHaNld7Y$YZ
15-10-2025	08:22:44	GBp	171	559.00	XLON	xHaNld7Y$1P
15-10-2025	08:22:44	GBp	188	560.00	XLON	xHaNld7Y$0w
15-10-2025	08:22:44	GBp	82	560.00	XLON	xHaNld7Y$0y
15-10-2025	08:22:44	GBp	303	559.50	XLON	xHaNld7Y$05
15-10-2025	08:22:35	GBp	435	560.00	XLON	xHaNld7Y$FI
15-10-2025	08:06:48	GBp	259	561.00	XLON	xHaNld7Ykyt
15-10-2025	08:06:10	GBp	2	561.00	XLON	xHaNld7YkQ6
15-10-2025	08:06:10	GBp	324	561.00	XLON	xHaNld7YkQ8
15-10-2025	08:03:35	GBp	278	561.00	XLON	xHaNld7Yj9B
15-10-2025	08:03:17	GBp	474	563.00	XLON	xHaNld7YjQ6
15-10-2025	08:03:17	GBp	329	562.00	XLON	xHaNld7YjQF
15-10-2025	08:03:17	GBp	409	562.50	XLON	xHaNld7YjQH