OSB GROUP PLC - Transaction in own shares

OSB GROUP PLC                                        
ISIN: GB00BLDRH360
10 October 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 09 October 2025 it had purchased a total of 62,548 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	62,548	-	-
Highest price paid (per ordinary share)	560.00p	-	-
Lowest price paid (per ordinary share)	554.50p	-	-
Volume weighted average price paid (per ordinary share)	558.76p	-	-

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 359,759,125 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 359,759,125.

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
09-10-2025	16:25:08	GBp	273	559.50	XLON	xeaNkWBmPwR
09-10-2025	16:24:17	GBp	489	560.00	XLON	xeaNkWBm6Nc
09-10-2025	16:24:17	GBp	372	560.00	XLON	xeaNkWBm6Ng
09-10-2025	16:11:39	GBp	1,990	560.00	XLON	xeaNkWBnqvW
09-10-2025	16:02:04	GBp	139	560.00	XLON	xeaNkWBnvqX
09-10-2025	16:02:04	GBp	145	560.00	XLON	xeaNkWBnvrV
09-10-2025	15:55:48	GBp	245	560.00	XLON	xeaNkWBnkn4
09-10-2025	15:55:01	GBp	240	560.00	XLON	xeaNkWBnlg2
09-10-2025	15:54:14	GBp	240	560.00	XLON	xeaNkWBniq3
09-10-2025	15:53:27	GBp	235	560.00	XLON	xeaNkWBnjvd
09-10-2025	15:52:40	GBp	27	560.00	XLON	xeaNkWBng4q
09-10-2025	15:52:40	GBp	363	560.00	XLON	xeaNkWBng4s
09-10-2025	15:51:17	GBp	675	560.00	XLON	xeaNkWBne7H
09-10-2025	15:51:17	GBp	430	560.00	XLON	xeaNkWBne7J
09-10-2025	15:51:17	GBp	324	560.00	XLON	xeaNkWBne7L
09-10-2025	15:51:17	GBp	307	560.00	XLON	xeaNkWBne7N
09-10-2025	15:50:04	GBp	396	559.50	XLON	xeaNkWBnMy@
09-10-2025	15:50:01	GBp	265	559.50	XLON	xeaNkWBnMxj
09-10-2025	15:50:00	GBp	34	559.50	XLON	xeaNkWBnMwA
09-10-2025	15:50:00	GBp	24	559.50	XLON	xeaNkWBnM55
09-10-2025	15:50:00	GBp	24	559.50	XLON	xeaNkWBnM57
09-10-2025	15:50:00	GBp	23	559.50	XLON	xeaNkWBnM5N
09-10-2025	15:43:08	GBp	624	559.50	XLON	xeaNkWBnT5x
09-10-2025	15:43:08	GBp	1,424	560.00	XLON	xeaNkWBnT59
09-10-2025	15:27:30	GBp	504	559.50	XLON	xeaNkWBopTQ
09-10-2025	15:27:30	GBp	618	559.50	XLON	xeaNkWBopTS
09-10-2025	15:27:30	GBp	62	559.50	XLON	xeaNkWBopUZ
09-10-2025	15:27:30	GBp	384	559.50	XLON	xeaNkWBopUn
09-10-2025	15:27:30	GBp	1,313	559.50	XLON	xeaNkWBopUp
09-10-2025	15:21:35	GBp	779	559.50	XLON	xeaNkWBoxs4
09-10-2025	15:21:35	GBp	564	559.50	XLON	xeaNkWBoxs6
09-10-2025	15:21:35	GBp	340	559.50	XLON	xeaNkWBoxmb
09-10-2025	15:21:35	GBp	296	559.50	XLON	xeaNkWBoxmh
09-10-2025	15:21:35	GBp	2,248	559.50	XLON	xeaNkWBoxmw
09-10-2025	15:21:35	GBp	503	559.50	XLON	xeaNkWBoxm4
09-10-2025	15:21:35	GBp	429	559.50	XLON	xeaNkWBoxmJ
09-10-2025	15:21:35	GBp	1,073	559.00	XLON	xeaNkWBoxmM
09-10-2025	15:21:11	GBp	1,168	559.50	XLON	xeaNkWBoxTz
09-10-2025	14:58:57	GBp	23	558.00	XLON	xeaNkWBoPxE
09-10-2025	14:51:47	GBp	1,500	558.00	XLON	xeaNkWBoC3B
09-10-2025	14:51:47	GBp	21	558.00	XLON	xeaNkWBoC3D
09-10-2025	14:51:46	GBp	513	558.00	XLON	xeaNkWBoC2U
09-10-2025	14:51:46	GBp	1,168	558.50	XLON	xeaNkWBoCDW
09-10-2025	14:46:05	GBp	498	559.00	XLON	xeaNkWBprjg
09-10-2025	14:46:05	GBp	110	559.50	XLON	xeaNkWBprjw
09-10-2025	14:46:05	GBp	250	559.50	XLON	xeaNkWBprj@
09-10-2025	14:46:05	GBp	560	559.50	XLON	xeaNkWBprj0
09-10-2025	14:46:05	GBp	166	559.50	XLON	xeaNkWBprjy
09-10-2025	14:46:05	GBp	1,168	559.00	XLON	xeaNkWBprjB
09-10-2025	14:43:36	GBp	100	560.00	XLON	xeaNkWBpmSg
09-10-2025	14:32:40	GBp	1,156	559.00	XLON	xeaNkWBpWLz
09-10-2025	14:31:07	GBp	100	560.00	XLON	xeaNkWBplOZ
09-10-2025	14:31:07	GBp	76	560.00	XLON	xeaNkWBplPS
09-10-2025	14:31:07	GBp	495	560.00	XLON	xeaNkWBplPU
09-10-2025	14:31:07	GBp	2,157	559.50	XLON	xeaNkWBplOg
09-10-2025	14:30:00	GBp	264	560.00	XLON	xeaNkWBpgXM
09-10-2025	14:30:00	GBp	58	560.00	XLON	xeaNkWBpgXV
09-10-2025	14:30:00	GBp	293	560.00	XLON	xeaNkWBpgWb
09-10-2025	14:30:00	GBp	270	560.00	XLON	xeaNkWBpgWX
09-10-2025	14:30:00	GBp	299	560.00	XLON	xeaNkWBpgWZ
09-10-2025	14:30:00	GBp	267	560.00	XLON	xeaNkWBpgWT
09-10-2025	14:26:25	GBp	199	560.00	XLON	xeaNkWBpMdW
09-10-2025	14:26:25	GBp	1,040	560.00	XLON	xeaNkWBpMdn
09-10-2025	13:55:14	GBp	1,408	558.50	XLON	xeaNkWBpAu2
09-10-2025	13:55:14	GBp	973	559.00	XLON	xeaNkWBpAuI
09-10-2025	13:41:25	GBp	172	559.50	XLON	xeaNkWBi$vP
09-10-2025	13:41:25	GBp	519	559.50	XLON	xeaNkWBi$vR
09-10-2025	13:41:25	GBp	291	559.50	XLON	xeaNkWBi$vS
09-10-2025	13:41:25	GBp	459	559.50	XLON	xeaNkWBi$vU
09-10-2025	13:41:25	GBp	330	559.00	XLON	xeaNkWBi$ul
09-10-2025	13:41:25	GBp	755	559.50	XLON	xeaNkWBi$uv
09-10-2025	12:54:01	GBp	572	558.50	XLON	xeaNkWBiFO$
09-10-2025	12:54:01	GBp	490	559.00	XLON	xeaNkWBiFO9
09-10-2025	12:50:49	GBp	1	559.50	XLON	xeaNkWBiBjS
09-10-2025	12:49:16	GBp	691	560.00	XLON	xeaNkWBi8Em
09-10-2025	12:00:04	GBp	599	560.00	XLON	xeaNkWBjS$n
09-10-2025	10:54:20	GBp	317	559.50	XLON	xeaNkWBk2xq
09-10-2025	10:54:19	GBp	329	560.00	XLON	xeaNkWBk25p
09-10-2025	10:54:19	GBp	1,135	560.00	XLON	xeaNkWBk25C
09-10-2025	10:43:15	GBp	54	558.00	XLON	xeaNkWBk9qp
09-10-2025	10:42:28	GBp	52	558.00	XLON	xeaNkWBk9Oc
09-10-2025	10:40:07	GBp	198	558.00	XLON	xeaNkWBltNW
09-10-2025	10:39:00	GBp	50	558.00	XLON	xeaNkWBlqJq
09-10-2025	10:39:00	GBp	148	558.00	XLON	xeaNkWBlqJo
09-10-2025	10:39:00	GBp	44	558.00	XLON	xeaNkWBlqJ9
09-10-2025	10:31:20	GBp	547	558.00	XLON	xeaNkWBlyfi
09-10-2025	10:28:41	GBp	469	558.50	XLON	xeaNkWBlw1u
09-10-2025	10:25:26	GBp	136	559.00	XLON	xeaNkWBlvn7
09-10-2025	10:25:26	GBp	231	559.00	XLON	xeaNkWBlvnB
09-10-2025	10:25:26	GBp	469	558.50	XLON	xeaNkWBlvnG
09-10-2025	10:04:38	GBp	936	558.00	XLON	xeaNkWBlKht
09-10-2025	10:04:35	GBp	198	558.50	XLON	xeaNkWBlKr4
09-10-2025	10:04:35	GBp	521	558.50	XLON	xeaNkWBlKqr
09-10-2025	10:00:37	GBp	361	558.00	XLON	xeaNkWBlG$i
09-10-2025	09:42:30	GBp	414	557.50	XLON	xeaNkWBlESC
09-10-2025	09:41:31	GBp	179	557.00	XLON	xeaNkWBlFUc
09-10-2025	09:41:31	GBp	219	557.00	XLON	xeaNkWBlFUe
09-10-2025	09:41:31	GBp	500	557.00	XLON	xeaNkWBlFUg
09-10-2025	09:41:31	GBp	105	556.50	XLON	xeaNkWBlFUw
09-10-2025	09:41:31	GBp	364	556.50	XLON	xeaNkWBlFUy
09-10-2025	09:35:08	GBp	469	557.00	XLON	xeaNkWBess5
09-10-2025	09:25:20	GBp	236	556.00	XLON	xeaNkWBe$o8
09-10-2025	09:18:20	GBp	718	555.50	XLON	xeaNkWBecm7
09-10-2025	09:09:48	GBp	249	556.50	XLON	xeaNkWBeiLI
09-10-2025	09:09:48	GBp	438	557.00	XLON	xeaNkWBeiLK
09-10-2025	09:08:49	GBp	498	557.50	XLON	xeaNkWBejBc
09-10-2025	09:08:49	GBp	24	557.50	XLON	xeaNkWBejBe
09-10-2025	09:08:02	GBp	337	558.00	XLON	xeaNkWBeg5W
09-10-2025	09:05:15	GBp	285	558.50	XLON	xeaNkWBeM$k
09-10-2025	09:05:15	GBp	309	558.50	XLON	xeaNkWBeM$m
09-10-2025	09:05:15	GBp	190	558.50	XLON	xeaNkWBeM$o
09-10-2025	09:05:15	GBp	36	558.50	XLON	xeaNkWBeM$q
09-10-2025	09:05:15	GBp	326	558.00	XLON	xeaNkWBeM$9
09-10-2025	09:05:15	GBp	469	558.50	XLON	xeaNkWBeM$D
09-10-2025	09:00:02	GBp	3,898	558.50	XLON	xeaNkWBeGOP
09-10-2025	09:00:02	GBp	273	558.50	XLON	xeaNkWBeGRf
09-10-2025	09:00:02	GBp	17	558.50	XLON	xeaNkWBeGRh
09-10-2025	09:00:02	GBp	191	558.50	XLON	xeaNkWBeGRj
09-10-2025	08:48:06	GBp	1	556.00	XLON	xeaNkWBe087
09-10-2025	08:39:36	GBp	2	555.00	XLON	xeaNkWBe9O1
09-10-2025	08:28:17	GBp	409	555.50	XLON	xeaNkWBfxx2
09-10-2025	08:27:35	GBp	291	556.00	XLON	xeaNkWBfuWk
09-10-2025	08:27:31	GBp	98	557.00	XLON	xeaNkWBfuhL
09-10-2025	08:27:31	GBp	100	557.00	XLON	xeaNkWBfuhN
09-10-2025	08:26:55	GBp	1,828	557.00	XLON	xeaNkWBfuII
09-10-2025	08:26:55	GBp	469	557.00	XLON	xeaNkWBfuIP
09-10-2025	08:26:55	GBp	326	556.50	XLON	xeaNkWBfuIS
09-10-2025	08:26:55	GBp	469	557.00	XLON	xeaNkWBfuIU
09-10-2025	08:13:48	GBp	279	556.50	XLON	xeaNkWBfjRv
09-10-2025	08:09:04	GBp	168	555.50	XLON	xeaNkWBff5M
09-10-2025	08:09:04	GBp	30	555.50	XLON	xeaNkWBff5O
09-10-2025	08:05:34	GBp	326	554.50	XLON	xeaNkWBfKh0
09-10-2025	08:05:26	GBp	359	555.00	XLON	xeaNkWBfKp2
09-10-2025	08:05:26	GBp	356	555.00	XLON	xeaNkWBfKp8
09-10-2025	08:05:26	GBp	341	555.00	XLON	xeaNkWBfKpF
09-10-2025	08:05:26	GBp	128	555.00	XLON	xeaNkWBfKpH
09-10-2025	08:01:25	GBp	29	555.00	XLON	xeaNkWBfGIl