OSB GROUP PLC                                        
ISIN: GB00BLDRH360
21 May 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 20 May 2025 it had purchased a total of 30,000 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	30,000	-	-
Highest price paid (per ordinary share)	482.80p	-	-
Lowest price paid (per ordinary share)	478.00p	-	-
Volume weighted average price paid (per ordinary share)	480.37p	-	-

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 366,434,715 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 366,434,715.

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
20-05-2025	16:25:00	GBp	101	481.80	XLON	xHaNuLtV5CQ
20-05-2025	16:24:59	GBp	136	482.00	XLON	xHaNuLtV5E7
20-05-2025	16:24:10	GBp	277	480.80	XLON	xHaNuLtV2tJ
20-05-2025	16:22:26	GBp	171	480.20	XLON	xHaNuLtV3om
20-05-2025	16:21:06	GBp	222	480.20	XLON	xHaNuLtV0YM
20-05-2025	16:17:50	GBp	267	480.20	XLON	xHaNuLtVEgS
20-05-2025	16:17:50	GBp	267	480.40	XLON	xHaNuLtVErw
20-05-2025	16:15:50	GBp	133	480.20	XLON	xHaNuLtVFTz
20-05-2025	16:15:20	GBp	133	480.40	XLON	xHaNuLtVCfl
20-05-2025	16:14:28	GBp	289	480.60	XLON	xHaNuLtVCIg
20-05-2025	16:14:28	GBp	417	480.80	XLON	xHaNuLtVCIi
20-05-2025	16:11:22	GBp	426	481.00	XLON	xHaNuLtVBef
20-05-2025	16:06:50	GBp	300	481.00	XLON	xHaNuLtV9ni
20-05-2025	16:06:33	GBp	187	481.20	XLON	xHaNuLtV9zE
20-05-2025	16:01:31	GBp	167	481.00	XLON	xHaNuLtOsO$
20-05-2025	16:01:30	GBp	238	481.00	XLON	xHaNuLtOsOJ
20-05-2025	15:59:56	GBp	408	481.00	XLON	xHaNuLtOtV4
20-05-2025	15:56:59	GBp	433	481.20	XLON	xHaNuLtOrmL
20-05-2025	15:56:59	GBp	68	481.20	XLON	xHaNuLtOrmN
20-05-2025	15:55:02	GBp	787	481.20	XLON	xHaNuLtOoeV
20-05-2025	15:50:14	GBp	294	480.40	XLON	xHaNuLtOmcQ
20-05-2025	15:41:18	GBp	324	480.40	XLON	xHaNuLtOyci
20-05-2025	15:41:18	GBp	1	480.40	XLON	xHaNuLtOyck
20-05-2025	15:36:02	GBp	180	480.20	XLON	xHaNuLtOwN2
20-05-2025	15:35:38	GBp	391	480.40	XLON	xHaNuLtOwVx
20-05-2025	15:35:18	GBp	323	480.60	XLON	xHaNuLtOxXz
20-05-2025	15:24:40	GBp	216	480.60	XLON	xHaNuLtOd5k
20-05-2025	15:24:02	GBp	185	480.80	XLON	xHaNuLtOdN4
20-05-2025	15:22:43	GBp	46	480.60	XLON	xHaNuLtOa@5
20-05-2025	15:22:43	GBp	275	480.60	XLON	xHaNuLtOa@7
20-05-2025	15:17:23	GBp	169	480.80	XLON	xHaNuLtOY5b
20-05-2025	15:15:06	GBp	217	480.40	XLON	xHaNuLtOZ@M
20-05-2025	15:14:06	GBp	246	480.60	XLON	xHaNuLtOZJZ
20-05-2025	15:14:06	GBp	420	480.60	XLON	xHaNuLtOZJf
20-05-2025	15:04:50	GBp	154	481.40	XLON	xHaNuLtOi4d
20-05-2025	15:03:30	GBp	153	481.40	XLON	xHaNuLtOjZy
20-05-2025	15:03:30	GBp	206	481.60	XLON	xHaNuLtOjZD
20-05-2025	15:03:20	GBp	558	481.60	XLON	xHaNuLtOjet
20-05-2025	15:02:56	GBp	294	481.80	XLON	xHaNuLtOjzK
20-05-2025	15:01:58	GBp	73	482.20	XLON	xHaNuLtOjVX
20-05-2025	15:01:58	GBp	51	482.20	XLON	xHaNuLtOjVZ
20-05-2025	15:00:28	GBp	57	482.20	XLON	xHaNuLtOgC$
20-05-2025	15:00:28	GBp	123	482.20	XLON	xHaNuLtOgCz
20-05-2025	14:48:32	GBp	124	480.20	XLON	xHaNuLtOKxL
20-05-2025	14:48:02	GBp	180	480.40	XLON	xHaNuLtOKJq
20-05-2025	14:48:01	GBp	268	480.60	XLON	xHaNuLtOKJI
20-05-2025	14:48:01	GBp	26	480.60	XLON	xHaNuLtOKJK
20-05-2025	14:45:40	GBp	408	480.80	XLON	xHaNuLtOIrK
20-05-2025	14:38:48	GBp	256	480.60	XLON	xHaNuLtOHVp
20-05-2025	14:38:35	GBp	330	480.60	XLON	xHaNuLtOUaG
20-05-2025	14:38:19	GBp	204	480.80	XLON	xHaNuLtOUf8
20-05-2025	14:38:19	GBp	294	481.00	XLON	xHaNuLtOUeh
20-05-2025	14:34:20	GBp	69	481.00	XLON	xHaNuLtOVTG
20-05-2025	14:34:20	GBp	269	481.00	XLON	xHaNuLtOVTI
20-05-2025	14:24:53	GBp	220	481.20	XLON	xHaNuLtOOoN
20-05-2025	14:21:28	GBp	163	481.60	XLON	xHaNuLtOP2h
20-05-2025	14:21:28	GBp	234	481.80	XLON	xHaNuLtOP2m
20-05-2025	14:13:51	GBp	145	482.00	XLON	xHaNuLtO7Hu
20-05-2025	14:13:50	GBp	207	482.20	XLON	xHaNuLtO7Hw
20-05-2025	14:13:50	GBp	505	482.40	XLON	xHaNuLtO7Hy
20-05-2025	14:11:43	GBp	27	482.80	XLON	xHaNuLtO4g1
20-05-2025	14:11:43	GBp	139	482.80	XLON	xHaNuLtO4g3
20-05-2025	14:09:27	GBp	124	482.80	XLON	xHaNuLtO5dn
20-05-2025	14:05:48	GBp	204	482.20	XLON	xHaNuLtO2E4
20-05-2025	14:05:48	GBp	193	482.40	XLON	xHaNuLtO2E6
20-05-2025	13:58:56	GBp	47	481.80	XLON	xHaNuLtO1Kb
20-05-2025	13:58:56	GBp	104	481.80	XLON	xHaNuLtO1KZ
20-05-2025	13:55:59	GBp	156	481.80	XLON	xHaNuLtOFdZ
20-05-2025	13:42:55	GBp	432	481.40	XLON	xHaNuLtOBoc
20-05-2025	13:42:13	GBp	98	481.80	XLON	xHaNuLtOB5F
20-05-2025	13:42:13	GBp	104	481.80	XLON	xHaNuLtOB5H
20-05-2025	13:38:17	GBp	177	481.80	XLON	xHaNuLtO8q0
20-05-2025	13:35:10	GBp	294	481.40	XLON	xHaNuLtO9ao
20-05-2025	13:28:42	GBp	118	481.60	XLON	xHaNuLtPs22
20-05-2025	13:28:42	GBp	145	481.60	XLON	xHaNuLtPs24
20-05-2025	13:28:42	GBp	124	481.60	XLON	xHaNuLtPs26
20-05-2025	13:19:36	GBp	39	481.40	XLON	xHaNuLtPryK
20-05-2025	13:19:36	GBp	103	481.40	XLON	xHaNuLtPryM
20-05-2025	13:16:39	GBp	126	481.40	XLON	xHaNuLtPoWG
20-05-2025	13:15:36	GBp	124	481.40	XLON	xHaNuLtPopz
20-05-2025	13:15:36	GBp	217	481.40	XLON	xHaNuLtPopD
20-05-2025	13:15:33	GBp	107	481.40	XLON	xHaNuLtPo$w
20-05-2025	12:51:31	GBp	478	479.60	XLON	xHaNuLtPydA
20-05-2025	12:34:18	GBp	338	479.40	XLON	xHaNuLtPu@S
20-05-2025	12:18:18	GBp	295	479.60	XLON	xHaNuLtPbbd
20-05-2025	12:11:09	GBp	220	480.00	XLON	xHaNuLtPZ4J
20-05-2025	12:11:09	GBp	320	480.20	XLON	xHaNuLtPZ4L
20-05-2025	12:07:22	GBp	13	480.20	XLON	xHaNuLtPWBj
20-05-2025	12:00:32	GBp	255	479.80	XLON	xHaNuLtPlqU
20-05-2025	11:59:48	GBp	449	480.00	XLON	xHaNuLtPl2R
20-05-2025	11:55:46	GBp	124	480.00	XLON	xHaNuLtPiJE
20-05-2025	11:55:46	GBp	301	479.80	XLON	xHaNuLtPiJL
20-05-2025	11:44:13	GBp	188	479.40	XLON	xHaNuLtPhDx
20-05-2025	11:28:44	GBp	224	479.20	XLON	xHaNuLtPNWn
20-05-2025	11:14:00	GBp	144	479.00	XLON	xHaNuLtPLSo
20-05-2025	11:09:58	GBp	249	479.20	XLON	xHaNuLtPIG5
20-05-2025	11:09:58	GBp	358	479.40	XLON	xHaNuLtPIG7
20-05-2025	10:55:38	GBp	257	479.40	XLON	xHaNuLtPUqO
20-05-2025	10:49:05	GBp	162	479.20	XLON	xHaNuLtPSqd
20-05-2025	10:44:05	GBp	238	479.40	XLON	xHaNuLtPTwq
20-05-2025	10:44:03	GBp	295	479.60	XLON	xHaNuLtPTwO
20-05-2025	10:30:00	GBp	131	478.80	XLON	xHaNuLtPPz$
20-05-2025	10:30:00	GBp	227	479.00	XLON	xHaNuLtPPz1
20-05-2025	10:20:46	GBp	171	479.20	XLON	xHaNuLtP7Hv
20-05-2025	10:20:46	GBp	245	479.40	XLON	xHaNuLtP7Hx
20-05-2025	10:20:30	GBp	471	479.60	XLON	xHaNuLtP7Vw
20-05-2025	10:12:56	GBp	162	479.20	XLON	xHaNuLtP2Ce
20-05-2025	10:12:56	GBp	179	478.80	XLON	xHaNuLtP2Ck
20-05-2025	10:12:56	GBp	115	478.80	XLON	xHaNuLtP2Cm
20-05-2025	10:10:40	GBp	647	479.20	XLON	xHaNuLtP3DZ
20-05-2025	10:10:40	GBp	47	479.20	XLON	xHaNuLtP3De
20-05-2025	10:10:40	GBp	77	479.20	XLON	xHaNuLtP3Dg
20-05-2025	10:10:31	GBp	131	479.20	XLON	xHaNuLtP39y
20-05-2025	10:10:31	GBp	313	479.00	XLON	xHaNuLtP397
20-05-2025	09:26:56	GBp	1	478.60	XLON	xHaNuLtQmMX
20-05-2025	09:26:56	GBp	367	478.60	XLON	xHaNuLtQmNV
20-05-2025	09:09:58	GBp	138	478.00	XLON	xHaNuLtQwf6
20-05-2025	09:09:58	GBp	201	478.20	XLON	xHaNuLtQwf8
20-05-2025	09:02:57	GBp	173	478.20	XLON	xHaNuLtQuyT
20-05-2025	09:00:00	GBp	286	478.40	XLON	xHaNuLtQv75
20-05-2025	08:54:58	GBp	144	478.60	XLON	xHaNuLtQdbD
20-05-2025	08:50:48	GBp	152	478.60	XLON	xHaNuLtQbYe
20-05-2025	08:50:48	GBp	183	478.80	XLON	xHaNuLtQbYp
20-05-2025	08:44:12	GBp	172	479.20	XLON	xHaNuLtQXbx
20-05-2025	08:44:12	GBp	251	479.40	XLON	xHaNuLtQXbz
20-05-2025	08:34:56	GBp	179	479.20	XLON	xHaNuLtQgUj
20-05-2025	08:34:56	GBp	102	479.20	XLON	xHaNuLtQgUl
20-05-2025	08:28:36	GBp	149	479.60	XLON	xHaNuLtQNY3
20-05-2025	08:26:13	GBp	244	480.00	XLON	xHaNuLtQKi9
20-05-2025	08:21:38	GBp	321	480.00	XLON	xHaNuLtQLsi
20-05-2025	08:15:18	GBp	185	478.60	XLON	xHaNuLtQJNd
20-05-2025	08:11:49	GBp	133	478.80	XLON	xHaNuLtQHrb
20-05-2025	08:10:13	GBp	156	479.00	XLON	xHaNuLtQHJe
20-05-2025	08:10:09	GBp	228	479.20	XLON	xHaNuLtQHIS
20-05-2025	08:05:11	GBp	281	479.00	XLON	xHaNuLtQSEH
20-05-2025	08:05:11	GBp	470	479.20	XLON	xHaNuLtQSEJ
20-05-2025	08:03:57	GBp	12	481.60	XLON	xHaNuLtQT88
20-05-2025	08:03:57	GBp	161	481.60	XLON	xHaNuLtQT8A