REG-OSB GROUP PLC - Transaction in Own Shares

OsbAnnouncement

08/12/2025 07:00

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OSB GROUP
PLC                                        
ISIN: GB00BLDRH360
08 December 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 05 December 2025 it had purchased a total of
8,895 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                      8,895                  -         -         
 Highest price paid (per ordinary share)                  569.00p                -         -         
 Lowest price paid (per ordinary share)                   566.00p                -         -         
 Volume weighted average price paid (per ordinary share)  567.56p                -         -         

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 356,750,449 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting
rights in the Company is 356,750,449.

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  
 05-12-2025        16:28:36    GBp       471     567.00  XLON           xeaNdmzSpNp     
 05-12-2025        16:28:36    GBp       471     567.00  XLON           xeaNdmzSpNv     
 05-12-2025        16:28:30    GBp       177     567.00  XLON           xeaNdmzSpHN     
 05-12-2025        16:28:30    GBp       471     567.00  XLON           xeaNdmzSpHT     
 05-12-2025        16:28:30    GBp       271     567.00  XLON           xeaNdmzSpGb     
 05-12-2025        16:28:30    GBp       200     567.00  XLON           xeaNdmzSpGd     
 05-12-2025        16:28:30    GBp       471     567.00  XLON           xeaNdmzSpGi     
 05-12-2025        16:28:30    GBp       435     567.00  XLON           xeaNdmzSpGu     
 05-12-2025        16:28:30    GBp       177     567.00  XLON           xeaNdmzSpGw     
 05-12-2025        16:28:30    GBp       1       567.00  XLON           xeaNdmzSpGy     
 05-12-2025        16:26:38    GBp       80      566.50  XLON           xeaNdmzSpVV     
 05-12-2025        16:25:13    GBp       674     567.00  XLON           xeaNdmzSmXZ     
 05-12-2025        16:20:53    GBp       316     567.50  XLON           xeaNdmzSmr5     
 05-12-2025        16:20:53    GBp       23      567.50  XLON           xeaNdmzSmr7     
 05-12-2025        16:20:53    GBp       435     567.50  XLON           xeaNdmzSmrC     
 05-12-2025        16:19:40    GBp       403     568.00  XLON           xeaNdmzSmsI     
 05-12-2025        16:10:32    GBp       359     569.00  XLON           xeaNdmzSmxe     
 05-12-2025        15:46:54    GBp       560     569.00  XLON           xeaNdmzSnXQ     
 05-12-2025        15:43:20    GBp       1,390   569.00  XLON           xeaNdmzSnlN     
 05-12-2025        15:43:20    GBp       204     569.00  XLON           xeaNdmzSnlP     
 05-12-2025        08:14:57    GBp       278     567.00  XLON           xeaNdmzSh@X     
 05-12-2025        08:06:15    GBp       475     566.00  XLON           xeaNdmzSh9d     
 05-12-2025        08:06:15    GBp       553     566.50  XLON           xeaNdmzSh9o