REG-Transaction in own shares and Total Voting Rights

OsbAnnouncement

Today 07:00

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OSB GROUP
PLC                                        
ISIN: GB00BLDRH360
01 July 2025

LEI number: 213800ZBKL9BHSL2K459

OSB GROUP PLC (the “Company”) 
Transaction in Own Shares and Total Voting Rights

The Company announces that on 30 June 2025 it had purchased a total of 2,119
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                      2,119                  -         -         
 Highest price paid (per ordinary share)                  521.00p                -         -         
 Lowest price paid (per ordinary share)                   520.00p                -         -         
 Volume weighted average price paid (per ordinary share)  520.63p                -         -         

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 364,956,931 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting
rights in the Company is 364,956,931 and may be used by shareholders (and
others with notification obligations) as the denominator for the calculation
by which they will determine if they are required to notify their interest in,
or a change in their interest in, the Company under the Financial Conduct
Authority’s Disclosure Guidance and Transparency Rules.

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  
 30-06-2025        16:11:27    GBp       355     521.00  XLON           xHaN@06qTol     
 30-06-2025        10:10:50    GBp       254     521.00  XLON           xHaN@06okRa     
 30-06-2025        09:58:08    GBp       206     520.50  XLON           xHaN@06oK0B     
 30-06-2025        09:56:31    GBp       201     520.00  XLON           xHaN@06oLQl     
 30-06-2025        09:56:31    GBp       271     520.00  XLON           xHaN@06oLQ$     
 30-06-2025        09:56:31    GBp       7       520.00  XLON           xHaN@06oLQ1     
 30-06-2025        09:48:38    GBp       422     520.50  XLON           xHaN@06oStN     
 30-06-2025        09:48:31    GBp       63      521.00  XLON           xHaN@06oS@@     
 30-06-2025        09:48:31    GBp       340     521.00  XLON           xHaN@06oS@0