REG-Transaction in own shares

OsbAnnouncement

Today 07:00

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OSB GROUP
PLC                                        
ISIN: GB00BLDRH360
08 July 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 07 July 2025 it had purchased a total of 13,588
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                      13,588                 -         -         
 Highest price paid (per ordinary share)                  531.00p                -         -         
 Lowest price paid (per ordinary share)                   529.00p                -         -         
 Volume weighted average price paid (per ordinary share)  530.13p                -         -         

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 364,725,525 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting
rights in the Company is 364,725,525.

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  
 07-07-2025        09:56:10    GBp       232     531.00  XLON           xeaN$DMJDfs     
 07-07-2025        09:43:47    GBp       277     530.50  XLON           xeaN$DMJANV     
 07-07-2025        09:43:47    GBp       453     530.00  XLON           xeaN$DMJAMY     
 07-07-2025        09:41:26    GBp       360     530.50  XLON           xeaN$DMJBXJ     
 07-07-2025        09:41:26    GBp       2       530.50  XLON           xeaN$DMJBXL     
 07-07-2025        09:41:26    GBp       2       530.50  XLON           xeaN$DMJBXN     
 07-07-2025        09:41:26    GBp       6       530.50  XLON           xeaN$DMJBXP     
 07-07-2025        09:41:26    GBp       137     530.50  XLON           xeaN$DMJBXR     
 07-07-2025        09:41:26    GBp       12      530.50  XLON           xeaN$DMJBXT     
 07-07-2025        09:41:18    GBp       344     530.00  XLON           xeaN$DMJBYe     
 07-07-2025        09:30:40    GBp       344     530.00  XLON           xeaN$DMJ81H     
 07-07-2025        09:27:36    GBp       549     530.00  XLON           xeaN$DMJ9b1     
 07-07-2025        09:22:16    GBp       187     530.00  XLON           xeaN$DMJ92T     
 07-07-2025        09:22:16    GBp       273     530.50  XLON           xeaN$DMJ92V     
 07-07-2025        09:19:31    GBp       99      531.00  XLON           xeaN$DMJ9V9     
 07-07-2025        09:19:31    GBp       277     531.00  XLON           xeaN$DMJ9VB     
 07-07-2025        09:16:04    GBp       462     531.00  XLON           xeaN$DMCsmR     
 07-07-2025        09:15:07    GBp       426     531.00  XLON           xeaN$DMCsvq     
 07-07-2025        09:10:10    GBp       129     531.00  XLON           xeaN$DMCtXO     
 07-07-2025        09:10:10    GBp       184     531.00  XLON           xeaN$DMCtXQ     
 07-07-2025        09:06:40    GBp       4       531.00  XLON           xeaN$DMCtxr     
 07-07-2025        09:06:40    GBp       211     531.00  XLON           xeaN$DMCtxp     
 07-07-2025        09:05:04    GBp       165     531.00  XLON           xeaN$DMCt9t     
 07-07-2025        09:05:04    GBp       23      531.00  XLON           xeaN$DMCt9v     
 07-07-2025        09:05:03    GBp       145     531.00  XLON           xeaN$DMCt91     
 07-07-2025        09:05:03    GBp       42      530.50  XLON           xeaN$DMCt9A     
 07-07-2025        09:05:02    GBp       235     530.50  XLON           xeaN$DMCt8B     
 07-07-2025        09:04:00    GBp       1,750   530.00  XLON           xeaN$DMCtGL     
 07-07-2025        09:04:00    GBp       2,000   530.00  XLON           xeaN$DMCtGN     
 07-07-2025        09:04:00    GBp       778     530.00  XLON           xeaN$DMCtJa     
 07-07-2025        09:04:00    GBp       2,000   530.00  XLON           xeaN$DMCtJc     
 07-07-2025        08:32:52    GBp       365     529.00  XLON           xeaN$DMCmk6     
 07-07-2025        08:22:14    GBp       562     529.50  XLON           xeaN$DMCn7x     
 07-07-2025        08:15:05    GBp       271     529.00  XLON           xeaN$DMC@A1     
 07-07-2025        08:15:05    GBp       134     529.00  XLON           xeaN$DMC@A3     
 07-07-2025        08:15:05    GBp       148     529.00  XLON           xeaN$DMC@A5