REG-Transaction in own shares

OsbAnnouncement

02/10/2025 07:00

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OSB GROUP
PLC                                        
ISIN: GB00BLDRH360
02 October 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 01 October 2025 it had purchased a total of
22,998 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                      22,998                 -         -         
 Highest price paid (per ordinary share)                  562.00p                -         -         
 Lowest price paid (per ordinary share)                   558.00p                -         -         
 Volume weighted average price paid (per ordinary share)  560.69p                -         -         

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 360,173,556 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting
rights in the Company is 360,173,556.

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  
 01-10-2025        16:15:14    GBp       487     561.50  XLON           xeaNjnce3Fb     
 01-10-2025        16:10:42    GBp       577     561.50  XLON           xeaNjnceD2e     
 01-10-2025        16:04:12    GBp       350     561.50  XLON           xeaNjncfrQa     
 01-10-2025        16:04:12    GBp       72      561.50  XLON           xeaNjncfrQc     
 01-10-2025        16:03:12    GBp       620     561.50  XLON           xeaNjncfp1Y     
 01-10-2025        16:02:50    GBp       672     562.00  XLON           xeaNjncfmsu     
 01-10-2025        15:53:14    GBp       441     561.00  XLON           xeaNjncfaTx     
 01-10-2025        15:53:14    GBp       25      561.00  XLON           xeaNjncfaTz     
 01-10-2025        15:53:14    GBp       15      561.00  XLON           xeaNjncfaT5     
 01-10-2025        15:53:14    GBp       503     561.00  XLON           xeaNjncfaT7     
 01-10-2025        15:40:55    GBp       323     561.50  XLON           xeaNjncfJ7d     
 01-10-2025        15:40:55    GBp       464     562.00  XLON           xeaNjncfJ7h     
 01-10-2025        15:40:55    GBp       708     562.00  XLON           xeaNjncfJ7s     
 01-10-2025        15:25:30    GBp       1,025   562.00  XLON           xeaNjncf8dU     
 01-10-2025        15:25:30    GBp       243     562.00  XLON           xeaNjncf8cP     
 01-10-2025        15:25:30    GBp       167     562.00  XLON           xeaNjncf8cR     
 01-10-2025        15:22:59    GBp       230     560.50  XLON           xeaNjncgtHL     
 01-10-2025        15:20:09    GBp       762     559.50  XLON           xeaNjncgmCM     
 01-10-2025        15:15:48    GBp       508     558.50  XLON           xeaNjncgvsE     
 01-10-2025        15:15:48    GBp       76      558.50  XLON           xeaNjncgvsG     
 01-10-2025        15:07:14    GBp       311     559.00  XLON           xeaNjncgfm@     
 01-10-2025        15:07:14    GBp       705     559.00  XLON           xeaNjncgfm7     
 01-10-2025        15:02:38    GBp       276     558.50  XLON           xeaNjncgUmI     
 01-10-2025        15:01:40    GBp       94      558.00  XLON           xeaNjncgSrG     
 01-10-2025        15:01:40    GBp       116     558.00  XLON           xeaNjncgSrI     
 01-10-2025        15:01:03    GBp       230     558.50  XLON           xeaNjncgT91     
 01-10-2025        15:01:03    GBp       73      558.50  XLON           xeaNjncgT99     
 01-10-2025        15:00:52    GBp       509     559.00  XLON           xeaNjncgQYQ     
 01-10-2025        14:56:12    GBp       724     559.50  XLON           xeaNjncg3jX     
 01-10-2025        14:55:58    GBp       116     560.00  XLON           xeaNjncg3HW     
 01-10-2025        14:55:58    GBp       250     560.00  XLON           xeaNjncg3HY     
 01-10-2025        14:50:28    GBp       796     559.50  XLON           xeaNjnchs9F     
 01-10-2025        14:50:27    GBp       205     559.50  XLON           xeaNjnchsL$     
 01-10-2025        14:50:27    GBp       473     560.00  XLON           xeaNjnchsLL     
 01-10-2025        14:48:38    GBp       503     560.50  XLON           xeaNjnchrRz     
 01-10-2025        14:42:14    GBp       201     560.50  XLON           xeaNjnchcTQ     
 01-10-2025        14:41:26    GBp       277     560.00  XLON           xeaNjnchayE     
 01-10-2025        14:37:03    GBp       113     559.50  XLON           xeaNjnchiux     
 01-10-2025        14:37:03    GBp       597     559.50  XLON           xeaNjnchiuz     
 01-10-2025        14:35:02    GBp       507     560.00  XLON           xeaNjnche4D     
 01-10-2025        14:31:08    GBp       473     560.50  XLON           xeaNjnchHc6     
 01-10-2025        14:18:55    GBp       308     560.00  XLON           xeaNjnchD@O     
 01-10-2025        14:18:55    GBp       443     560.50  XLON           xeaNjnchD@V     
 01-10-2025        14:13:56    GBp       121     561.00  XLON           xeaNjncat54     
 01-10-2025        14:13:56    GBp       200     561.00  XLON           xeaNjncat5G     
 01-10-2025        14:13:56    GBp       741     561.00  XLON           xeaNjncat4g     
 01-10-2025        13:50:58    GBp       399     561.00  XLON           xeaNjncahRI     
 01-10-2025        13:50:58    GBp       523     561.00  XLON           xeaNjncahRT     
 01-10-2025        13:46:12    GBp       623     561.50  XLON           xeaNjncaLqd     
 01-10-2025        13:25:58    GBp       305     562.00  XLON           xeaNjncaAL2     
 01-10-2025        13:25:23    GBp       526     562.00  XLON           xeaNjncaBtl     
 01-10-2025        13:10:04    GBp       243     561.50  XLON           xeaNjncbdZG     
 01-10-2025        13:09:13    GBp       532     562.00  XLON           xeaNjncbdI4     
 01-10-2025        08:26:25    GBp       31      559.50  XLON           xeaNjncYum@     
 01-10-2025        08:26:25    GBp       225     560.00  XLON           xeaNjncYum7     
 01-10-2025        08:21:03    GBp       370     561.00  XLON           xeaNjncYYoN     
 01-10-2025        08:12:41    GBp       348     561.00  XLON           xeaNjncYh$W     
 01-10-2025        08:12:41    GBp       500     561.50  XLON           xeaNjncYh$Y     
 01-10-2025        08:09:19    GBp       743     562.00  XLON           xeaNjncYNya