REG-OSB GROUP PLC - Transaction in Own Shares

OsbAnnouncement

05/12/2025 07:00

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OSB GROUP
PLC                                        
ISIN: GB00BLDRH360
05 December 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 04 December 2025 it had purchased a total of
17,504 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                      17,504                 -         -         
 Highest price paid (per ordinary share)                  569.00p                -         -         
 Lowest price paid (per ordinary share)                   563.50p                -         -         
 Volume weighted average price paid (per ordinary share)  565.89p                -         -         

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 356,759,344 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting
rights in the Company is 356,759,344.

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  
 04-12-2025        16:28:30    GBp       375     566.50  XLON           xeaNcAfroM$     
 04-12-2025        16:28:30    GBp       71      566.50  XLON           xeaNcAfroM1     
 04-12-2025        16:25:40    GBp       23      566.50  XLON           xeaNcAfrpXO     
 04-12-2025        16:25:40    GBp       334     566.50  XLON           xeaNcAfrpXQ     
 04-12-2025        16:25:40    GBp       644     566.50  XLON           xeaNcAfrpXS     
 04-12-2025        16:25:40    GBp       407     566.50  XLON           xeaNcAfrpXU     
 04-12-2025        16:25:40    GBp       605     566.00  XLON           xeaNcAfrpWd     
 04-12-2025        16:25:40    GBp       1,848   566.50  XLON           xeaNcAfrpWj     
 04-12-2025        16:25:40    GBp       5       566.50  XLON           xeaNcAfrpWn     
 04-12-2025        16:17:41    GBp       67      565.50  XLON           xeaNcAfrp5t     
 04-12-2025        16:17:29    GBp       88      565.50  XLON           xeaNcAfrp42     
 04-12-2025        16:17:28    GBp       257     565.50  XLON           xeaNcAfrp44     
 04-12-2025        16:16:54    GBp       195     566.00  XLON           xeaNcAfrp7F     
 04-12-2025        16:16:18    GBp       12      566.00  XLON           xeaNcAfrp0a     
 04-12-2025        16:16:18    GBp       186     566.00  XLON           xeaNcAfrp0c     
 04-12-2025        16:15:42    GBp       192     566.00  XLON           xeaNcAfrp3m     
 04-12-2025        16:15:06    GBp       284     566.00  XLON           xeaNcAfrp2H     
 04-12-2025        16:15:06    GBp       217     566.00  XLON           xeaNcAfrp2Q     
 04-12-2025        16:15:06    GBp       595     565.50  XLON           xeaNcAfrp2S     
 04-12-2025        16:15:06    GBp       1,067   565.50  XLON           xeaNcAfrpDY     
 04-12-2025        16:09:31    GBp       121     566.00  XLON           xeaNcAfrpHj     
 04-12-2025        16:09:31    GBp       453     566.00  XLON           xeaNcAfrpHl     
 04-12-2025        16:05:04    GBp       21      565.50  XLON           xeaNcAfrmb7     
 04-12-2025        16:05:04    GBp       617     565.50  XLON           xeaNcAfrmb9     
 04-12-2025        16:05:04    GBp       1,500   565.50  XLON           xeaNcAfrmbL     
 04-12-2025        16:05:04    GBp       100     565.50  XLON           xeaNcAfrmbN     
 04-12-2025        16:00:37    GBp       341     565.00  XLON           xeaNcAfrmp4     
 04-12-2025        15:43:29    GBp       255     564.00  XLON           xeaNcAfrnmR     
 04-12-2025        15:32:21    GBp       193     565.00  XLON           xeaNcAfrnPx     
 04-12-2025        15:23:36    GBp       421     563.50  XLON           xeaNcAfr@nq     
 04-12-2025        15:03:50    GBp       211     564.50  XLON           xeaNcAfr$q9     
 04-12-2025        14:56:32    GBp       300     565.00  XLON           xeaNcAfr$DE     
 04-12-2025        14:45:29    GBp       290     565.00  XLON           xeaNcAfryU4     
 04-12-2025        14:32:33    GBp       233     564.00  XLON           xeaNcAfrwx3     
 04-12-2025        14:21:40    GBp       230     564.50  XLON           xeaNcAfruW8     
 04-12-2025        14:04:32    GBp       199     565.50  XLON           xeaNcAfrciS     
 04-12-2025        13:48:29    GBp       254     566.00  XLON           xeaNcAfrdtg     
 04-12-2025        13:28:56    GBp       440     567.00  XLON           xeaNcAfraJp     
 04-12-2025        12:45:34    GBp       311     565.50  XLON           xeaNcAfrZJv     
 04-12-2025        12:09:49    GBp       242     569.00  XLON           xeaNcAfrXsY     
 04-12-2025        12:05:19    GBp       284     569.00  XLON           xeaNcAfrX@U     
 04-12-2025        11:17:05    GBp       211     569.00  XLON           xeaNcAfrkUw     
 04-12-2025        10:55:04    GBp       283     568.00  XLON           xeaNcAfrlEu     
 04-12-2025        10:34:43    GBp       259     566.00  XLON           xeaNcAfrim@     
 04-12-2025        10:00:36    GBp       404     566.00  XLON           xeaNcAfrgir     
 04-12-2025        09:52:00    GBp       20      565.00  XLON           xeaNcAfrgLp     
 04-12-2025        09:16:43    GBp       231     566.00  XLON           xeaNcAfrer8     
 04-12-2025        09:00:50    GBp       229     566.00  XLON           xeaNcAfreR@     
 04-12-2025        08:38:23    GBp       193     568.00  XLON           xeaNcAfrfO$     
 04-12-2025        08:22:42    GBp       317     565.50  XLON           xeaNcAfrMFG     
 04-12-2025        08:02:59    GBp       248     565.50  XLON           xeaNcAfrNGx     
 04-12-2025        08:01:36    GBp       339     564.50  XLON           xeaNcAfrNRK     
 04-12-2025        08:01:36    GBp       282     565.00  XLON           xeaNcAfrNRM