Transaction in own shares

OSB GROUP PLC                                        
ISIN: GB00BLDRH360
30 May 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 29 May 2025 it had purchased a total of 7,979 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	7,979	-	-
Highest price paid (per ordinary share)	486.00p	-	-
Lowest price paid (per ordinary share)	484.00p	-	-
Volume weighted average price paid (per ordinary share)	484.96p	-	-

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 366,176,532 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 366,176,532.

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
29-05-2025	15:52:36	GBp	319	484.60	XLON	xHaNvAHI3HP
29-05-2025	15:52:36	GBp	457	484.80	XLON	xHaNvAHI3HR
29-05-2025	15:51:02	GBp	157	485.00	XLON	xHaNvAHI1hc
29-05-2025	15:51:02	GBp	231	485.00	XLON	xHaNvAHI1he
29-05-2025	15:50:33	GBp	783	485.00	XLON	xHaNvAHI193
29-05-2025	15:50:33	GBp	323	484.60	XLON	xHaNvAHI19D
29-05-2025	15:45:27	GBp	487	484.20	XLON	xHaNvAHIAIF
29-05-2025	15:42:03	GBp	275	484.60	XLON	xHaNvAHJsgv
29-05-2025	15:38:38	GBp	39	484.00	XLON	xHaNvAHJr0e
29-05-2025	15:38:38	GBp	139	484.00	XLON	xHaNvAHJr06
29-05-2025	15:38:37	GBp	53	484.00	XLON	xHaNvAHJr30
29-05-2025	15:38:26	GBp	123	484.00	XLON	xHaNvAHJrJY
29-05-2025	15:38:26	GBp	124	484.00	XLON	xHaNvAHJrJp
29-05-2025	15:38:25	GBp	167	484.20	XLON	xHaNvAHJrJ4
29-05-2025	15:38:25	GBp	300	484.20	XLON	xHaNvAHJrJC
29-05-2025	15:38:25	GBp	38	484.20	XLON	xHaNvAHJrJE
29-05-2025	15:38:25	GBp	11	484.20	XLON	xHaNvAHJrJG
29-05-2025	15:38:25	GBp	126	484.00	XLON	xHaNvAHJrJR
29-05-2025	15:38:25	GBp	212	484.20	XLON	xHaNvAHJrIj
29-05-2025	15:38:25	GBp	486	484.40	XLON	xHaNvAHJrIA
29-05-2025	15:37:15	GBp	170	484.60	XLON	xHaNvAHJpZe
29-05-2025	15:33:09	GBp	127	484.00	XLON	xHaNvAHJ$Z0
29-05-2025	15:32:33	GBp	122	484.40	XLON	xHaNvAHJ$Oo
29-05-2025	15:32:23	GBp	184	484.60	XLON	xHaNvAHJylJ
29-05-2025	15:27:44	GBp	125	485.20	XLON	xHaNvAHJuGw
29-05-2025	15:20:19	GBp	146	485.80	XLON	xHaNvAHJXsa
29-05-2025	15:20:19	GBp	246	486.00	XLON	xHaNvAHJXsq
29-05-2025	12:03:45	GBp	15	486.00	XLON	xHaNvAHDFe0
29-05-2025	12:03:45	GBp	283	486.00	XLON	xHaNvAHDFe5
29-05-2025	11:19:04	GBp	1	485.80	XLON	xHaNvAHEkpe
29-05-2025	11:19:04	GBp	28	485.80	XLON	xHaNvAHEkpg
29-05-2025	11:19:04	GBp	1	485.80	XLON	xHaNvAHEkpi
29-05-2025	11:19:04	GBp	17	485.80	XLON	xHaNvAHEkpk
29-05-2025	11:19:04	GBp	401	486.00	XLON	xHaNvAHEkpm
29-05-2025	11:19:04	GBp	31	486.00	XLON	xHaNvAHEkpo
29-05-2025	11:19:04	GBp	15	486.00	XLON	xHaNvAHEkpq
29-05-2025	11:02:37	GBp	15	486.00	XLON	xHaNvAHELLa
29-05-2025	09:19:32	GBp	196	485.80	XLON	xHaNvAHFH9m
29-05-2025	09:17:28	GBp	226	486.00	XLON	xHaNvAHFUI@
29-05-2025	09:12:02	GBp	461	486.00	XLON	xHaNvAHFQo7
29-05-2025	08:15:34	GBp	319	486.00	XLON	xHaNvAH8YrC