Transaction in Own Shares and Total voting rights

Core Viewpoint - OSB Group PLC has announced the purchase of 331,747 ordinary shares as part of its share buyback program, which will be cancelled following the purchase [3][5]. Group 1: Share Buyback Details - The share buyback occurred on August 29, 2025, with shares purchased on the London Stock Exchange, CBOE BXE, and CBOE CX [3]. - The breakdown of shares purchased includes 161,020 on the London Stock Exchange, 140,527 on CBOE BXE, and 30,200 on CBOE CX [4]. - The highest price paid per ordinary share was 549.00p on the London Stock Exchange, while the lowest was 528.50p [4]. - The volume weighted average price paid per ordinary share was 534.35p on the London Stock Exchange, 533.62p on CBOE BXE, and 532.19p on CBOE CX [4]. Group 2: Post-Purchase Impact - Following the cancellation of the repurchased shares, the total number of ordinary shares in issue will be 362,398,506 [5]. - There are no ordinary shares held in treasury, meaning the total number of voting rights in the company remains at 362,398,506 [6]. Group 3: Regulatory Compliance - The announcement complies with Article 5(1)(b) of Regulation (EU) No 596/2014, as implemented under English law [7]. - A detailed breakdown of individual trades made by Citigroup Global Markets Limited on behalf of the company is provided as part of the share buyback program [7].