OSB GROUP PLC                                        
ISIN: GB00BLDRH360
13 August 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 12 August 2025 it had purchased a total of 2,064 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 2,064 - -
Highest price paid (per ordinary share) 561.00p - -
Lowest price paid (per ordinary share) 561.00p - -
Volume weighted average price paid (per ordinary share) 561.00p - -

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 363,364,080 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 363,364,080.

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
12-08-2025 12:26:30 GBp 244 561.00 XLON xHaNrgzQn9F
12-08-2025 12:03:25 GBp 329 561.00 XLON xHaNrgzQuTc
12-08-2025 11:11:43 GBp 301 561.00 XLON xHaNrgzQfDz
12-08-2025 11:11:43 GBp 517 561.00 XLON xHaNrgzQfD0
12-08-2025 11:09:12 GBp 673 561.00 XLON xHaNrgzQMxD