REG-OSB GROUP PLC - Transaction in Own Shares

OsbAnnouncement

09/12/2025 07:00

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OSB GROUP
PLC                                        
ISIN: GB00BLDRH360
09 December 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 08 December 2025 it had purchased a total of
2,873 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                      2,873                  -         -         
 Highest price paid (per ordinary share)                  568.00p                -         -         
 Lowest price paid (per ordinary share)                   566.50p                -         -         
 Volume weighted average price paid (per ordinary share)  567.70p                -         -         

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 356,783,830 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting
rights in the Company is 356,783,830.

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  
 08-12-2025        09:42:28    GBp       5       568.00  XLON           xeaNdIRO7$j     
 08-12-2025        09:42:28    GBp       186     568.00  XLON           xeaNdIRO7$l     
 08-12-2025        09:16:55    GBp       277     567.50  XLON           xeaNdIRO3@8     
 08-12-2025        09:16:55    GBp       619     568.00  XLON           xeaNdIRO3@E     
 08-12-2025        09:09:02    GBp       42      568.00  XLON           xeaNdIRO0LM     
 08-12-2025        08:57:42    GBp       386     566.50  XLON           xeaNdIROELb     
 08-12-2025        08:54:17    GBp       272     567.50  XLON           xeaNdIROFzF     
 08-12-2025        08:54:17    GBp       139     568.00  XLON           xeaNdIROFzH     
 08-12-2025        08:54:17    GBp       251     568.00  XLON           xeaNdIROFzJ     
 08-12-2025        08:37:18    GBp       696     568.00  XLON           xeaNdIROABb