OSB GROUP PLC - Transaction in own shares

OSB GROUP PLC                                        
ISIN: GB00BLDRH360
09 October 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 08 October 2025 it had purchased a total of 74,524 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	74,524	-	-
Highest price paid (per ordinary share)	561.00p	-	-
Lowest price paid (per ordinary share)	555.00p	-	-
Volume weighted average price paid (per ordinary share)	557.64p	-	-

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 359,821,673 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 359,821,673.

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
08-10-2025	16:25:50	GBp	245	556.50	XLON	xeaNkwsA6AQ
08-10-2025	16:25:30	GBp	234	556.50	XLON	xeaNkwsA7hP
08-10-2025	16:25:21	GBp	96	556.50	XLON	xeaNkwsA7@B
08-10-2025	16:24:50	GBp	559	556.50	XLON	xeaNkwsA4W@
08-10-2025	16:20:03	GBp	1,860	556.00	XLON	xeaNkwsAFxN
08-10-2025	16:19:54	GBp	262	556.50	XLON	xeaNkwsAFNL
08-10-2025	16:19:54	GBp	38	556.50	XLON	xeaNkwsAFNN
08-10-2025	16:19:02	GBp	246	556.50	XLON	xeaNkwsADhO
08-10-2025	16:19:02	GBp	53	556.50	XLON	xeaNkwsADhQ
08-10-2025	16:18:10	GBp	250	556.50	XLON	xeaNkwsAAD9
08-10-2025	16:18:10	GBp	42	556.50	XLON	xeaNkwsAADB
08-10-2025	16:17:18	GBp	237	556.50	XLON	xeaNkwsA8dd
08-10-2025	16:11:26	GBp	2,230	556.50	XLON	xeaNkwsBmMR
08-10-2025	16:11:26	GBp	27	556.50	XLON	xeaNkwsBmMU
08-10-2025	16:11:23	GBp	199	556.50	XLON	xeaNkwsBmSK
08-10-2025	16:11:23	GBp	1,359	556.50	XLON	xeaNkwsBmSU
08-10-2025	16:03:26	GBp	246	556.00	XLON	xeaNkwsBdbU
08-10-2025	16:02:34	GBp	244	556.00	XLON	xeaNkwsBaWt
08-10-2025	16:01:42	GBp	238	556.00	XLON	xeaNkwsBbjH
08-10-2025	16:01:10	GBp	240	556.00	XLON	xeaNkwsBbM6
08-10-2025	15:59:58	GBp	246	556.00	XLON	xeaNkwsBZJO
08-10-2025	15:59:06	GBp	216	556.00	XLON	xeaNkwsBWOR
08-10-2025	15:59:06	GBp	14	556.00	XLON	xeaNkwsBWOT
08-10-2025	15:59:06	GBp	8	556.00	XLON	xeaNkwsBWOV
08-10-2025	15:58:14	GBp	212	556.00	XLON	xeaNkwsBkWj
08-10-2025	15:57:22	GBp	65	556.00	XLON	xeaNkwsBlhx
08-10-2025	15:57:22	GBp	157	556.00	XLON	xeaNkwsBlhz
08-10-2025	15:56:30	GBp	207	556.00	XLON	xeaNkwsBixs
08-10-2025	15:55:38	GBp	200	556.00	XLON	xeaNkwsBj1x
08-10-2025	15:54:46	GBp	318	556.00	XLON	xeaNkwsBhbc
08-10-2025	15:43:31	GBp	237	556.00	XLON	xeaNkwsBQR$
08-10-2025	15:43:31	GBp	500	556.00	XLON	xeaNkwsBQR1
08-10-2025	15:43:08	GBp	34	556.00	XLON	xeaNkwsBRmy
08-10-2025	15:38:59	GBp	374	556.00	XLON	xeaNkwsB5vd
08-10-2025	15:38:15	GBp	847	556.00	XLON	xeaNkwsB2q@
08-10-2025	15:38:07	GBp	598	556.50	XLON	xeaNkwsB2$G
08-10-2025	15:38:07	GBp	1,085	556.50	XLON	xeaNkwsB2$I
08-10-2025	15:33:06	GBp	293	557.00	XLON	xeaNkwsBAoH
08-10-2025	15:24:52	GBp	278	556.50	XLON	xeaNkws4yX9
08-10-2025	15:24:48	GBp	773	556.50	XLON	xeaNkws4yiL
08-10-2025	15:19:07	GBp	467	556.50	XLON	xeaNkws4bw3
08-10-2025	15:19:07	GBp	1,128	557.00	XLON	xeaNkws4bwN
08-10-2025	15:11:59	GBp	744	557.50	XLON	xeaNkws4eND
08-10-2025	15:10:16	GBp	647	557.50	XLON	xeaNkws4Nae
08-10-2025	15:04:56	GBp	345	556.50	XLON	xeaNkws4UBL
08-10-2025	15:02:11	GBp	316	556.00	XLON	xeaNkws4Q91
08-10-2025	15:02:00	GBp	453	556.50	XLON	xeaNkws4Rkl
08-10-2025	14:58:00	GBp	250	557.00	XLON	xeaNkws4562
08-10-2025	14:57:01	GBp	348	557.00	XLON	xeaNkws42Rp
08-10-2025	14:56:55	GBp	552	557.00	XLON	xeaNkws43jk
08-10-2025	14:56:44	GBp	1,601	557.50	XLON	xeaNkws43mi
08-10-2025	14:56:42	GBp	178	558.00	XLON	xeaNkws43yl
08-10-2025	14:56:42	GBp	77	558.00	XLON	xeaNkws43yn
08-10-2025	14:55:24	GBp	20	558.00	XLON	xeaNkws41y@
08-10-2025	14:55:24	GBp	36	558.00	XLON	xeaNkws41y0
08-10-2025	14:55:24	GBp	190	558.00	XLON	xeaNkws41yy
08-10-2025	14:42:56	GBp	196	558.00	XLON	xeaNkws5@@A
08-10-2025	14:42:55	GBp	309	558.50	XLON	xeaNkws5@@M
08-10-2025	14:42:55	GBp	612	558.50	XLON	xeaNkws5@@S
08-10-2025	14:40:10	GBp	735	559.00	XLON	xeaNkws5zLG
08-10-2025	14:36:50	GBp	718	559.50	XLON	xeaNkws5v9V
08-10-2025	14:36:33	GBp	53	560.50	XLON	xeaNkws5cZe
08-10-2025	14:36:33	GBp	143	560.50	XLON	xeaNkws5cZg
08-10-2025	14:36:33	GBp	700	560.50	XLON	xeaNkws5cZi
08-10-2025	14:36:33	GBp	900	560.00	XLON	xeaNkws5cZp
08-10-2025	14:28:16	GBp	103	560.50	XLON	xeaNkws5jRo
08-10-2025	14:28:16	GBp	108	560.50	XLON	xeaNkws5jRq
08-10-2025	14:28:16	GBp	45	560.50	XLON	xeaNkws5jRs
08-10-2025	14:28:16	GBp	965	560.00	XLON	xeaNkws5jR$
08-10-2025	14:28:16	GBp	127	560.00	XLON	xeaNkws5jRz
08-10-2025	14:17:25	GBp	459	560.50	XLON	xeaNkws5GRD
08-10-2025	14:17:25	GBp	53	560.50	XLON	xeaNkws5GRF
08-10-2025	14:17:25	GBp	363	560.50	XLON	xeaNkws5GRH
08-10-2025	14:11:32	GBp	894	561.00	XLON	xeaNkws5Q3S
08-10-2025	14:04:32	GBp	837	561.00	XLON	xeaNkws55di
08-10-2025	13:55:10	GBp	430	558.50	XLON	xeaNkws5Daj
08-10-2025	13:51:16	GBp	713	558.00	XLON	xeaNkws586H
08-10-2025	13:51:16	GBp	455	559.50	XLON	xeaNkws586R
08-10-2025	13:51:16	GBp	363	559.00	XLON	xeaNkws586T
08-10-2025	13:51:16	GBp	36	559.00	XLON	xeaNkws586V
08-10-2025	13:51:16	GBp	507	559.00	XLON	xeaNkws581X
08-10-2025	13:51:16	GBp	471	558.50	XLON	xeaNkws581e
08-10-2025	13:51:16	GBp	672	559.00	XLON	xeaNkws581g
08-10-2025	13:32:38	GBp	221	559.00	XLON	xeaNkws6vkK
08-10-2025	13:32:10	GBp	250	559.00	XLON	xeaNkws6v6X
08-10-2025	13:32:10	GBp	270	559.00	XLON	xeaNkws6v6Z
08-10-2025	13:32:10	GBp	733	559.00	XLON	xeaNkws6v7R
08-10-2025	13:32:10	GBp	533	559.00	XLON	xeaNkws6v7T
08-10-2025	13:32:10	GBp	48	559.00	XLON	xeaNkws6v7V
08-10-2025	13:32:10	GBp	700	558.50	XLON	xeaNkws6v6b
08-10-2025	13:32:10	GBp	368	558.50	XLON	xeaNkws6v6h
08-10-2025	13:11:27	GBp	105	557.50	XLON	xeaNkws6M4f
08-10-2025	13:11:27	GBp	425	557.50	XLON	xeaNkws6M4h
08-10-2025	12:43:25	GBp	500	558.00	XLON	xeaNkws60cW
08-10-2025	12:43:25	GBp	30	558.00	XLON	xeaNkws60dU
08-10-2025	12:43:25	GBp	625	558.50	XLON	xeaNkws60cY
08-10-2025	12:27:16	GBp	8	558.00	XLON	xeaNkws7s0e
08-10-2025	12:22:44	GBp	218	558.00	XLON	xeaNkws7r7c
08-10-2025	12:20:35	GBp	214	558.00	XLON	xeaNkws7oNH
08-10-2025	12:19:01	GBp	264	558.00	XLON	xeaNkws7pUE
08-10-2025	12:18:27	GBp	387	558.50	XLON	xeaNkws7mgI
08-10-2025	12:16:09	GBp	606	559.00	XLON	xeaNkws7nGm
08-10-2025	12:16:09	GBp	700	560.00	XLON	xeaNkws7nJb
08-10-2025	12:16:09	GBp	493	560.00	XLON	xeaNkws7nJd
08-10-2025	12:16:09	GBp	527	560.00	XLON	xeaNkws7nJZ
08-10-2025	12:16:09	GBp	572	559.50	XLON	xeaNkws7nJk
08-10-2025	12:04:31	GBp	242	560.50	XLON	xeaNkws7cTl
08-10-2025	12:04:31	GBp	58	560.50	XLON	xeaNkws7cTn
08-10-2025	12:04:31	GBp	2	560.00	XLON	xeaNkws7cTs
08-10-2025	12:00:20	GBp	212	560.50	XLON	xeaNkws7Ymg
08-10-2025	12:00:20	GBp	199	560.50	XLON	xeaNkws7Ym2
08-10-2025	11:55:53	GBp	310	560.50	XLON	xeaNkws7kt$
08-10-2025	11:55:50	GBp	199	560.50	XLON	xeaNkws7kns
08-10-2025	11:55:50	GBp	1,822	560.50	XLON	xeaNkws7knT
08-10-2025	11:35:10	GBp	577	558.50	XLON	xeaNkws7UnX
08-10-2025	11:31:27	GBp	43	558.50	XLON	xeaNkws7TrW
08-10-2025	11:31:27	GBp	173	558.50	XLON	xeaNkws7TrY
08-10-2025	11:31:27	GBp	4,855	558.50	XLON	xeaNkws7TgS
08-10-2025	11:31:27	GBp	465	558.50	XLON	xeaNkws7TgU
08-10-2025	11:31:27	GBp	241	558.50	XLON	xeaNkws7Tra
08-10-2025	11:31:27	GBp	566	558.00	XLON	xeaNkws7Trh
08-10-2025	11:00:20	GBp	170	557.50	XLON	xeaNkws0roI
08-10-2025	11:00:20	GBp	177	557.50	XLON	xeaNkws0roK
08-10-2025	11:00:20	GBp	700	557.50	XLON	xeaNkws0roM
08-10-2025	11:00:20	GBp	327	557.00	XLON	xeaNkws0rzf
08-10-2025	11:00:20	GBp	471	557.50	XLON	xeaNkws0rzh
08-10-2025	10:42:29	GBp	215	557.00	XLON	xeaNkws0dO5
08-10-2025	10:42:29	GBp	258	557.00	XLON	xeaNkws0dO7
08-10-2025	10:27:32	GBp	72	557.50	XLON	xeaNkws0eg6
08-10-2025	10:27:32	GBp	417	557.50	XLON	xeaNkws0eg8
08-10-2025	10:27:32	GBp	13	557.50	XLON	xeaNkws0egA
08-10-2025	10:27:32	GBp	177	557.50	XLON	xeaNkws0egC
08-10-2025	10:27:32	GBp	700	557.50	XLON	xeaNkws0egE
08-10-2025	10:27:32	GBp	382	557.50	XLON	xeaNkws0egI
08-10-2025	10:27:32	GBp	513	557.00	XLON	xeaNkws0egR
08-10-2025	10:00:13	GBp	305	557.50	XLON	xeaNkws028u
08-10-2025	09:56:42	GBp	519	556.00	XLON	xeaNkws0EaH
08-10-2025	09:52:28	GBp	206	556.00	XLON	xeaNkws0AeW
08-10-2025	09:50:52	GBp	230	556.00	XLON	xeaNkws0B9M
08-10-2025	09:50:37	GBp	144	556.00	XLON	xeaNkws0BGc
08-10-2025	09:50:37	GBp	55	556.00	XLON	xeaNkws0BGe
08-10-2025	09:49:32	GBp	371	556.00	XLON	xeaNkws08Si
08-10-2025	09:42:27	GBp	130	555.50	XLON	xeaNkws1oRp
08-10-2025	09:42:27	GBp	281	555.50	XLON	xeaNkws1oRr
08-10-2025	09:42:27	GBp	209	555.50	XLON	xeaNkws1oRt
08-10-2025	09:42:00	GBp	876	555.00	XLON	xeaNkws1pvb
08-10-2025	09:42:00	GBp	471	555.00	XLON	xeaNkws1pvj
08-10-2025	09:22:34	GBp	606	555.50	XLON	xeaNkws1Ycq
08-10-2025	09:15:40	GBp	406	555.50	XLON	xeaNkws1kGN
08-10-2025	09:15:05	GBp	581	556.00	XLON	xeaNkws1ln0
08-10-2025	09:10:38	GBp	633	556.50	XLON	xeaNkws1hrp
08-10-2025	09:10:32	GBp	223	557.00	XLON	xeaNkws1hsH
08-10-2025	09:10:32	GBp	36	557.00	XLON	xeaNkws1hsJ
08-10-2025	09:10:32	GBp	700	557.00	XLON	xeaNkws1hsL
08-10-2025	09:10:32	GBp	471	557.00	XLON	xeaNkws1hsV
08-10-2025	09:00:47	GBp	341	557.00	XLON	xeaNkws1GhO
08-10-2025	08:50:59	GBp	798	555.00	XLON	xeaNkws1P6I
08-10-2025	08:50:56	GBp	930	556.00	XLON	xeaNkws1P2h
08-10-2025	08:50:56	GBp	943	556.00	XLON	xeaNkws1P2n
08-10-2025	08:50:56	GBp	210	556.00	XLON	xeaNkws1P2p
08-10-2025	08:50:56	GBp	255	556.00	XLON	xeaNkws1P2r
08-10-2025	08:50:56	GBp	102	556.00	XLON	xeaNkws1P2t
08-10-2025	08:50:56	GBp	453	556.00	XLON	xeaNkws1P2v
08-10-2025	08:50:56	GBp	247	556.00	XLON	xeaNkws1P27
08-10-2025	08:50:56	GBp	471	555.50	XLON	xeaNkws1P2F
08-10-2025	08:26:59	GBp	67	556.00	XLON	xeaNkws2mnx
08-10-2025	08:26:59	GBp	306	556.00	XLON	xeaNkws2mnz
08-10-2025	08:21:12	GBp	494	556.00	XLON	xeaNkws2z2O
08-10-2025	08:21:00	GBp	500	556.50	XLON	xeaNkws2zPS
08-10-2025	08:21:00	GBp	471	556.50	XLON	xeaNkws2zOr
08-10-2025	08:15:21	GBp	314	557.00	XLON	xeaNkws2dzQ
08-10-2025	08:15:21	GBp	45	557.00	XLON	xeaNkws2dzS
08-10-2025	08:13:23	GBp	200	557.00	XLON	xeaNkws2bj$
08-10-2025	08:13:23	GBp	71	557.00	XLON	xeaNkws2bjz
08-10-2025	08:10:26	GBp	133	557.50	XLON	xeaNkws2Ztu
08-10-2025	08:10:26	GBp	401	557.50	XLON	xeaNkws2Ztw
08-10-2025	08:08:28	GBp	199	557.50	XLON	xeaNkws2WGQ
08-10-2025	08:04:32	GBp	86	558.00	XLON	xeaNkws2lJN
08-10-2025	08:04:32	GBp	795	558.00	XLON	xeaNkws2lJP