REG-Transaction in own shares

OsbAnnouncement

Yesterday 07:00

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OSB GROUP
PLC                                        
ISIN: GB00BLDRH360
04 July 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 03 July 2025 it had purchased a total of 6,414
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                      6,414                  -         -         
 Highest price paid (per ordinary share)                  521.00p                -         -         
 Lowest price paid (per ordinary share)                   518.00p                -         -         
 Volume weighted average price paid (per ordinary share)  519.85p                -         -         

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 364,759,517 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting
rights in the Company is 364,759,517.

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  
 03-07-2025        08:52:15    GBp       175     521.00  XLON           xeaN$baeSa1     
 03-07-2025        08:49:20    GBp       294     520.50  XLON           xeaN$baeSZv     
 03-07-2025        08:49:20    GBp       491     521.00  XLON           xeaN$baeSZx     
 03-07-2025        08:46:38    GBp       242     520.50  XLON           xeaN$baeSfx     
 03-07-2025        08:46:38    GBp       406     521.00  XLON           xeaN$baeSfz     
 03-07-2025        08:36:03    GBp       247     520.00  XLON           xeaN$baeSBT     
 03-07-2025        08:36:03    GBp       523     520.50  XLON           xeaN$baeSAW     
 03-07-2025        08:36:03    GBp       322     520.00  XLON           xeaN$baeSAY     
 03-07-2025        08:30:06    GBp       308     521.00  XLON           xeaN$baeTfG     
 03-07-2025        08:22:21    GBp       261     518.00  XLON           xeaN$baeQhE     
 03-07-2025        08:18:15    GBp       289     518.00  XLON           xeaN$baeQmE     
 03-07-2025        08:18:15    GBp       416     518.50  XLON           xeaN$baeQmG     
 03-07-2025        08:17:43    GBp       85      519.00  XLON           xeaN$baeQoL     
 03-07-2025        08:17:43    GBp       134     519.00  XLON           xeaN$baeQoN     
 03-07-2025        08:17:43    GBp       238     518.50  XLON           xeaN$baeQoQ     
 03-07-2025        08:17:42    GBp       344     519.00  XLON           xeaN$baeQoS     
 03-07-2025        08:17:39    GBp       344     519.00  XLON           xeaN$baeQzp     
 03-07-2025        08:08:09    GBp       166     519.50  XLON           xeaN$baeRoh     
 03-07-2025        08:08:09    GBp       51      519.50  XLON           xeaN$baeRoj     
 03-07-2025        08:08:09    GBp       365     520.00  XLON           xeaN$baeRol     
 03-07-2025        08:03:47    GBp       292     520.00  XLON           xeaN$baeORC     
 03-07-2025        08:03:47    GBp       421     520.50  XLON           xeaN$baeORE