OSB GROUP PLC ISIN: GB00BLDRH36013 October 2025 LEI number: 213800ZBKL9BHSL2K459 OSB GROUP PLC (the “Company”) Transaction in Own Shares The Company announces that on 10 October 2025 it had purchased a total of 119,220 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 ExchangeCBOE BXECBOE CXENumber of ...