REG-Transaction in own shares

OsbAnnouncement

Yesterday 07:00

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OSB GROUP
PLC                                        
ISIN: GB00BLDRH360
22 July 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 21 July 2025 it had purchased a total of 3,619
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                      3,619                  -         -         
 Highest price paid (per ordinary share)                  566.50p                -         -         
 Lowest price paid (per ordinary share)                   564.00p                -         -         
 Volume weighted average price paid (per ordinary share)  565.26p                -         -         

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 364,652,029 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting
rights in the Company is 364,652,029.

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  
 21-07-2025        08:51:43    GBp       529     566.50  XLON           xeaNootJTSi     
 21-07-2025        08:27:12    GBp       96      564.00  XLON           xeaNootJ9wh     
 21-07-2025        08:27:09    GBp       175     565.00  XLON           xeaNootJ977     
 21-07-2025        08:27:09    GBp       210     565.00  XLON           xeaNootJ979     
 21-07-2025        08:27:09    GBp       250     565.00  XLON           xeaNootJ97B     
 21-07-2025        08:27:09    GBp       139     565.00  XLON           xeaNootJ97D     
 21-07-2025        08:27:09    GBp       700     565.00  XLON           xeaNootJ97F     
 21-07-2025        08:27:09    GBp       354     564.50  XLON           xeaNootJ97O     
 21-07-2025        08:09:57    GBp       217     565.00  XLON           xeaNootCw6W     
 21-07-2025        08:09:57    GBp       137     565.00  XLON           xeaNootCw7U     
 21-07-2025        08:07:28    GBp       208     565.50  XLON           xeaNootCuZk     
 21-07-2025        08:07:27    GBp       98      565.50  XLON           xeaNootCuZ7     
 21-07-2025        08:07:27    GBp       506     565.50  XLON           xeaNootCuZ9