REG-Transaction in own shares

OsbAnnouncement

05/08/2025 07:00

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OSB GROUP
PLC                                        
ISIN: GB00BLDRH360
05 August 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 04 August 2025 it had purchased a total of
38,154 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                      38,154                 -         -         
 Highest price paid (per ordinary share)                  557.00p                -         -         
 Lowest price paid (per ordinary share)                   554.00p                -         -         
 Volume weighted average price paid (per ordinary share)  556.34p                -         -         

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 363,636,703 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting
rights in the Company is 363,636,703.

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  
 04-08-2025        15:47:54    GBp       219     557.00  XLON           xeaNquOMs3S     
 04-08-2025        15:47:33    GBp       109     557.00  XLON           xeaNquOMtda     
 04-08-2025        15:47:33    GBp       30      557.00  XLON           xeaNquOMtdW     
 04-08-2025        15:47:33    GBp       81      557.00  XLON           xeaNquOMtdY     
 04-08-2025        15:45:50    GBp       386     557.00  XLON           xeaNquOMrqA     
 04-08-2025        15:45:50    GBp       128     557.00  XLON           xeaNquOMrqC     
 04-08-2025        15:45:50    GBp       578     557.00  XLON           xeaNquOMrqE     
 04-08-2025        15:45:50    GBp       521     557.00  XLON           xeaNquOMrqG     
 04-08-2025        15:45:50    GBp       20,718  557.00  XLON           xeaNquOMrtc     
 04-08-2025        15:45:50    GBp       124     557.00  XLON           xeaNquOMrte     
 04-08-2025        15:45:50    GBp       127     557.00  XLON           xeaNquOMrtg     
 04-08-2025        15:45:50    GBp       128     557.00  XLON           xeaNquOMrti     
 04-08-2025        15:45:50    GBp       48      557.00  XLON           xeaNquOMrtk     
 04-08-2025        15:45:50    GBp       210     557.00  XLON           xeaNquOMrtt     
 04-08-2025        15:45:50    GBp       140     557.00  XLON           xeaNquOMrt0     
 04-08-2025        15:45:50    GBp       64      557.00  XLON           xeaNquOMrt2     
 04-08-2025        15:45:50    GBp       138     557.00  XLON           xeaNquOMrtP     
 04-08-2025        15:45:50    GBp       65      557.00  XLON           xeaNquOMrtR     
 04-08-2025        15:45:50    GBp       203     557.00  XLON           xeaNquOMrsY     
 04-08-2025        15:45:50    GBp       261     557.00  XLON           xeaNquOMrsn     
 04-08-2025        15:45:50    GBp       343     557.00  XLON           xeaNquOMrsz     
 04-08-2025        15:45:50    GBp       124     557.00  XLON           xeaNquOMrs$     
 04-08-2025        15:45:50    GBp       111     557.00  XLON           xeaNquOMrs1     
 04-08-2025        15:45:50    GBp       109     557.00  XLON           xeaNquOMrs3     
 04-08-2025        15:45:50    GBp       504     557.00  XLON           xeaNquOMrs5     
 04-08-2025        15:45:41    GBp       1,071   556.00  XLON           xeaNquOMrzO     
 04-08-2025        15:13:51    GBp       992     555.50  XLON           xeaNquOMRuY     
 04-08-2025        15:09:58    GBp       66      555.50  XLON           xeaNquOM4gW     
 04-08-2025        15:09:58    GBp       356     555.50  XLON           xeaNquOM4go     
 04-08-2025        15:05:16    GBp       410     555.50  XLON           xeaNquOM12m     
 04-08-2025        15:03:07    GBp       63      555.00  XLON           xeaNquOMCgs     
 04-08-2025        15:03:07    GBp       188     555.00  XLON           xeaNquOMCgu     
 04-08-2025        15:03:07    GBp       554     555.00  XLON           xeaNquOMCg3     
 04-08-2025        15:03:07    GBp       599     555.00  XLON           xeaNquOMCgA     
 04-08-2025        15:03:07    GBp       356     555.00  XLON           xeaNquOMCgC     
 04-08-2025        14:57:08    GBp       304     554.50  XLON           xeaNquONt2x     
 04-08-2025        14:57:08    GBp       834     554.50  XLON           xeaNquONt2z     
 04-08-2025        14:57:08    GBp       877     555.00  XLON           xeaNquONtFk     
 04-08-2025        14:31:30    GBp       992     555.00  XLON           xeaNquONM3M     
 04-08-2025        14:30:00    GBp       14      555.00  XLON           xeaNquONLzX     
 04-08-2025        14:30:00    GBp       18      555.00  XLON           xeaNquONLzZ     
 04-08-2025        14:07:25    GBp       366     554.50  XLON           xeaNquONEHb     
 04-08-2025        14:07:18    GBp       524     555.00  XLON           xeaNquONEPY     
 04-08-2025        14:07:18    GBp       1,210   555.00  XLON           xeaNquONEPf     
 04-08-2025        14:07:03    GBp       38      555.00  XLON           xeaNquONFeA     
 04-08-2025        08:23:38    GBp       430     555.00  XLON           xeaNquOJDNP     
 04-08-2025        08:23:38    GBp       29      555.00  XLON           xeaNquOJDNR     
 04-08-2025        08:23:38    GBp       250     555.00  XLON           xeaNquOJDNT     
 04-08-2025        08:23:38    GBp       80      555.00  XLON           xeaNquOJDNN     
 04-08-2025        08:23:38    GBp       435     554.50  XLON           xeaNquOJDMf     
 04-08-2025        08:16:09    GBp       435     555.00  XLON           xeaNquOCpzM     
 04-08-2025        08:13:38    GBp       389     554.00  XLON           xeaNquOC@bp     
 04-08-2025        08:13:38    GBp       331     554.00  XLON           xeaNquOC@bw     
 04-08-2025        08:13:38    GBp       474     554.50  XLON           xeaNquOC@by