Transaction in own shares

OSB GROUP PLC                                        
ISIN: GB00BLDRH360
28 May 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 27 May 2025 it had purchased a total of 9,547 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	9,547	-	-
Highest price paid (per ordinary share)	486.00p	-	-
Lowest price paid (per ordinary share)	484.00p	-	-
Volume weighted average price paid (per ordinary share)	485.40p	-	-

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 366,207,811 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 366,207,811.

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
27-05-2025	16:28:12	GBp	194	486.00	XLON	xHaNvU8yrru
27-05-2025	16:27:51	GBp	48	486.00	XLON	xHaNvU8yrLt
27-05-2025	16:27:46	GBp	588	486.00	XLON	xHaNvU8yrGW
27-05-2025	16:24:00	GBp	211	485.60	XLON	xHaNvU8y@et
27-05-2025	16:23:49	GBp	231	485.80	XLON	xHaNvU8y@ur
27-05-2025	16:23:48	GBp	495	485.80	XLON	xHaNvU8y@uC
27-05-2025	16:23:48	GBp	1,166	486.00	XLON	xHaNvU8y@uG
27-05-2025	16:10:22	GBp	47	485.80	XLON	xHaNvU8ykuh
27-05-2025	16:10:22	GBp	102	485.80	XLON	xHaNvU8ykuj
27-05-2025	16:10:22	GBp	105	485.80	XLON	xHaNvU8ykuo
27-05-2025	16:10:22	GBp	197	485.80	XLON	xHaNvU8ykuq
27-05-2025	16:10:22	GBp	257	485.80	XLON	xHaNvU8yku3
27-05-2025	16:10:22	GBp	177	485.80	XLON	xHaNvU8yku5
27-05-2025	16:10:22	GBp	107	485.80	XLON	xHaNvU8yku7
27-05-2025	16:10:22	GBp	786	485.80	XLON	xHaNvU8ykuK
27-05-2025	16:10:22	GBp	660	485.60	XLON	xHaNvU8ykx4
27-05-2025	16:10:22	GBp	2	485.60	XLON	xHaNvU8ykx6
27-05-2025	16:05:32	GBp	15	485.60	XLON	xHaNvU8yhNY
27-05-2025	16:04:33	GBp	32	485.60	XLON	xHaNvU8yfkd
27-05-2025	16:04:25	GBp	133	485.60	XLON	xHaNvU8yfoG
27-05-2025	16:01:05	GBp	706	485.20	XLON	xHaNvU8yLZO
27-05-2025	15:59:50	GBp	203	485.00	XLON	xHaNvU8yIJs
27-05-2025	15:58:58	GBp	225	485.00	XLON	xHaNvU8yJVk
27-05-2025	15:57:41	GBp	748	485.00	XLON	xHaNvU8yHt6
27-05-2025	15:57:41	GBp	167	485.00	XLON	xHaNvU8yHsZ
27-05-2025	15:56:53	GBp	130	485.00	XLON	xHaNvU8yUea
27-05-2025	15:56:53	GBp	36	485.00	XLON	xHaNvU8yUeY
27-05-2025	15:56:53	GBp	161	485.00	XLON	xHaNvU8yUht
27-05-2025	15:56:53	GBp	101	485.00	XLON	xHaNvU8yUhV
27-05-2025	15:56:53	GBp	50	485.00	XLON	xHaNvU8yUgX
27-05-2025	15:56:31	GBp	191	485.00	XLON	xHaNvU8yU8W
27-05-2025	15:56:31	GBp	4	485.00	XLON	xHaNvU8yU8Y
27-05-2025	15:54:26	GBp	355	484.80	XLON	xHaNvU8yThL
27-05-2025	15:51:43	GBp	120	484.00	XLON	xHaNvU8yOt@
27-05-2025	15:51:31	GBp	607	484.00	XLON	xHaNvU8yOCX
27-05-2025	15:51:31	GBp	190	484.00	XLON	xHaNvU8yOCg