REG-Transaction in own shares

OsbAnnouncement

Today 07:00

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OSB GROUP
PLC                                        
ISIN: GB00BLDRH360
9 May 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 08 May 2025 it had purchased a total of 33,379
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                      33,379                 -         -         
 Highest price paid (per ordinary share)                  485.00p                -         -         
 Lowest price paid (per ordinary share)                   483.40p                -         -         
 Volume weighted average price paid (per ordinary share)  484.65p                -         -         

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 367,330,552 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting
rights in the Company is 367,330,552.

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                               
 Currency           GBP                               



 Transaction Date  Trade Time  Currency  Volume  Price   Trading Venue  Transaction ID  
 08-05-2025        15:12:28    GBp       328     484.80  XLON           xeaN6RWn$fP     
 08-05-2025        15:11:55    GBp       62      485.00  XLON           xeaN6RWnymA     
 08-05-2025        15:11:55    GBp       435     485.00  XLON           xeaN6RWnymN     
 08-05-2025        15:11:54    GBp       400     485.00  XLON           xeaN6RWnyp9     
 08-05-2025        15:08:31    GBp       671     485.00  XLON           xeaN6RWncsL     
 08-05-2025        15:08:03    GBp       516     485.00  XLON           xeaN6RWndpo     
 08-05-2025        15:08:03    GBp       255     485.00  XLON           xeaN6RWndpq     
 08-05-2025        14:56:00    GBp       688     484.80  XLON           xeaN6RWnUuS     
 08-05-2025        14:55:16    GBp       682     484.80  XLON           xeaN6RWnVHS     
 08-05-2025        14:55:02    GBp       704     484.80  XLON           xeaN6RWnSu9     
 08-05-2025        14:44:33    GBp       890     484.80  XLON           xeaN6RWnB4t     
 08-05-2025        14:43:52    GBp       191     484.80  XLON           xeaN6RWn85W     
 08-05-2025        14:43:52    GBp       36      484.80  XLON           xeaN6RWn8wQ     
 08-05-2025        14:43:52    GBp       25      484.80  XLON           xeaN6RWn8wS     
 08-05-2025        14:43:52    GBp       151     484.80  XLON           xeaN6RWn8wU     
 08-05-2025        14:43:04    GBp       26      484.80  XLON           xeaN6RWn9R4     
 08-05-2025        14:43:04    GBp       224     484.80  XLON           xeaN6RWn9R6     
 08-05-2025        14:43:04    GBp       126     484.80  XLON           xeaN6RWn9R8     
 08-05-2025        14:41:38    GBp       243     484.60  XLON           xeaN6RWoqoi     
 08-05-2025        14:38:35    GBp       157     484.60  XLON           xeaN6RWo@oS     
 08-05-2025        14:38:32    GBp       303     484.80  XLON           xeaN6RWo@6I     
 08-05-2025        14:36:40    GBp       1,060   485.00  XLON           xeaN6RWow3P     
 08-05-2025        14:34:52    GBp       126     485.00  XLON           xeaN6RWocrF     
 08-05-2025        14:34:52    GBp       208     485.00  XLON           xeaN6RWocrH     
 08-05-2025        14:34:52    GBp       682     485.00  XLON           xeaN6RWocrJ     
 08-05-2025        14:34:52    GBp       24      485.00  XLON           xeaN6RWocrR     
 08-05-2025        14:34:52    GBp       208     485.00  XLON           xeaN6RWocrT     
 08-05-2025        14:34:52    GBp       1,071   485.00  XLON           xeaN6RWocqe     
 08-05-2025        14:34:52    GBp       35      485.00  XLON           xeaN6RWocqg     
 08-05-2025        14:34:52    GBp       29      485.00  XLON           xeaN6RWocqi     
 08-05-2025        14:34:52    GBp       208     485.00  XLON           xeaN6RWocqk     
 08-05-2025        14:34:52    GBp       56      485.00  XLON           xeaN6RWocqm     
 08-05-2025        14:34:52    GBp       159     485.00  XLON           xeaN6RWocqo     
 08-05-2025        14:31:53    GBp       48      484.60  XLON           xeaN6RWoZMO     
 08-05-2025        14:31:53    GBp       430     484.60  XLON           xeaN6RWoZMQ     
 08-05-2025        14:31:53    GBp       800     484.60  XLON           xeaN6RWoZMS     
 08-05-2025        14:31:53    GBp       149     484.40  XLON           xeaN6RWoZHd     
 08-05-2025        14:31:53    GBp       68      484.60  XLON           xeaN6RWoZHf     
 08-05-2025        14:31:48    GBp       181     484.60  XLON           xeaN6RWoWX@     
 08-05-2025        14:31:48    GBp       592     484.80  XLON           xeaN6RWoWW6     
 08-05-2025        14:31:47    GBp       172     484.80  XLON           xeaN6RWoWZX     
 08-05-2025        14:31:47    GBp       400     484.80  XLON           xeaN6RWoWZZ     
 08-05-2025        14:27:11    GBp       569     485.00  XLON           xeaN6RWohxD     
 08-05-2025        14:18:01    GBp       123     484.80  XLON           xeaN6RWoUFp     
 08-05-2025        14:18:01    GBp       157     484.80  XLON           xeaN6RWoUFr     
 08-05-2025        14:18:01    GBp       1,329   484.80  XLON           xeaN6RWoUFn     
 08-05-2025        14:18:00    GBp       190     484.60  XLON           xeaN6RWoUFH     
 08-05-2025        14:18:00    GBp       48      484.60  XLON           xeaN6RWoUFL     
 08-05-2025        14:18:00    GBp       547     484.80  XLON           xeaN6RWoUFO     
 08-05-2025        14:01:40    GBp       550     484.20  XLON           xeaN6RWoBiq     
 08-05-2025        14:01:40    GBp       171     484.20  XLON           xeaN6RWoBis     
 08-05-2025        13:58:43    GBp       363     484.00  XLON           xeaN6RWpsQz     
 08-05-2025        13:58:43    GBp       713     484.20  XLON           xeaN6RWpsQR     
 08-05-2025        13:56:00    GBp       297     484.20  XLON           xeaN6RWpof7     
 08-05-2025        13:56:00    GBp       144     484.40  XLON           xeaN6RWpofI     
 08-05-2025        13:56:00    GBp       537     484.40  XLON           xeaN6RWpofK     
 08-05-2025        13:54:00    GBp       682     484.60  XLON           xeaN6RWpm0x     
 08-05-2025        13:53:00    GBp       796     484.80  XLON           xeaN6RWpnNS     
 08-05-2025        13:44:22    GBp       473     484.20  XLON           xeaN6RWpdVf     
 08-05-2025        13:44:22    GBp       145     484.20  XLON           xeaN6RWpdVj     
 08-05-2025        13:40:05    GBp       128     484.00  XLON           xeaN6RWpXly     
 08-05-2025        13:40:00    GBp       184     484.20  XLON           xeaN6RWpXzv     
 08-05-2025        13:39:58    GBp       285     484.20  XLON           xeaN6RWpXvQ     
 08-05-2025        13:39:39    GBp       168     484.40  XLON           xeaN6RWpkWq     
 08-05-2025        13:39:39    GBp       242     484.40  XLON           xeaN6RWpkWs     
 08-05-2025        13:37:26    GBp       138     484.80  XLON           xeaN6RWpglX     
 08-05-2025        13:37:26    GBp       232     484.60  XLON           xeaN6RWpgkl     
 08-05-2025        13:37:26    GBp       495     484.80  XLON           xeaN6RWpgeb     
 08-05-2025        13:37:26    GBp       38      484.80  XLON           xeaN6RWpgep     
 08-05-2025        13:35:20    GBp       407     485.00  XLON           xeaN6RWpeUw     
 08-05-2025        13:34:09    GBp       726     485.00  XLON           xeaN6RWpMtp     
 08-05-2025        13:34:09    GBp       25      485.00  XLON           xeaN6RWpMtt     
 08-05-2025        13:34:09    GBp       727     485.00  XLON           xeaN6RWpMtC     
 08-05-2025        13:34:09    GBp       46      485.00  XLON           xeaN6RWpMtE     
 08-05-2025        13:34:09    GBp       16      485.00  XLON           xeaN6RWpMtI     
 08-05-2025        13:34:09    GBp       29      485.00  XLON           xeaN6RWpMtK     
 08-05-2025        13:34:09    GBp       856     485.00  XLON           xeaN6RWpMsg     
 08-05-2025        13:34:09    GBp       34      485.00  XLON           xeaN6RWpMsi     
 08-05-2025        13:34:09    GBp       82      485.00  XLON           xeaN6RWpMsk     
 08-05-2025        13:30:02    GBp       59      484.60  XLON           xeaN6RWpJAp     
 08-05-2025        13:30:02    GBp       339     484.60  XLON           xeaN6RWpJAx     
 08-05-2025        13:14:36    GBp       211     485.00  XLON           xeaN6RWp3S9     
 08-05-2025        13:10:44    GBp       43      485.00  XLON           xeaN6RWpCcC     
 08-05-2025        13:10:44    GBp       90      485.00  XLON           xeaN6RWpCcE     
 08-05-2025        13:10:44    GBp       15      485.00  XLON           xeaN6RWpCXb     
 08-05-2025        13:10:44    GBp       534     485.00  XLON           xeaN6RWpCXZ     
 08-05-2025        12:55:50    GBp       40      485.00  XLON           xeaN6RWi@Jm     
 08-05-2025        12:55:50    GBp       37      485.00  XLON           xeaN6RWi@JD     
 08-05-2025        12:04:22    GBp       202     484.20  XLON           xeaN6RWi3@y     
 08-05-2025        12:02:52    GBp       162     485.00  XLON           xeaN6RWi0O1     
 08-05-2025        12:02:43    GBp       274     485.00  XLON           xeaN6RWi1Z5     
 08-05-2025        10:30:27    GBp       168     484.80  XLON           xeaN6RWkyBQ     
 08-05-2025        10:30:27    GBp       131     484.80  XLON           xeaN6RWkyBS     
 08-05-2025        10:30:27    GBp       430     485.00  XLON           xeaN6RWkyAe     
 08-05-2025        10:07:32    GBp       668     484.00  XLON           xeaN6RWkfg7     
 08-05-2025        10:07:32    GBp       31      484.00  XLON           xeaN6RWkfg9     
 08-05-2025        10:07:32    GBp       63      484.00  XLON           xeaN6RWkfgB     
 08-05-2025        10:07:32    GBp       15      484.00  XLON           xeaN6RWkfgD     
 08-05-2025        10:07:32    GBp       25      484.00  XLON           xeaN6RWkfgH     
 08-05-2025        10:07:32    GBp       832     484.00  XLON           xeaN6RWkfrc     
 08-05-2025        10:07:32    GBp       31      484.00  XLON           xeaN6RWkfre     
 08-05-2025        10:01:39    GBp       121     483.80  XLON           xeaN6RWkLpk     
 08-05-2025        10:01:39    GBp       98      483.80  XLON           xeaN6RWkLpm     
 08-05-2025        10:01:39    GBp       294     483.40  XLON           xeaN6RWkLpv     
 08-05-2025        10:01:33    GBp       83      483.80  XLON           xeaN6RWkLwT     
 08-05-2025        10:01:33    GBp       166     483.80  XLON           xeaN6RWkLwV     
 08-05-2025        10:01:33    GBp       800     483.80  XLON           xeaN6RWkL5X     
 08-05-2025        10:01:33    GBp       607     483.80  XLON           xeaN6RWkL5r     
 08-05-2025        10:01:33    GBp       5       483.80  XLON           xeaN6RWkL5t     
 08-05-2025        10:01:33    GBp       294     483.40  XLON           xeaN6RWkL58