REG-OSB GROUP PLC - Transaction in Own Shares

OsbAnnouncement

10/12/2025 07:00

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OSB GROUP
PLC                                        
ISIN: GB00BLDRH360
10 December 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 09 December 2025 it had purchased a total of
53,617 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                      53,617                 -         -         
 Highest price paid (per ordinary share)                  576.00p                -         -         
 Lowest price paid (per ordinary share)                   570.00p                -         -         
 Volume weighted average price paid (per ordinary share)  572.84p                -         -         

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 356,730,213 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting
rights in the Company is 356,730,213.

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  
 09-12-2025        16:28:28    GBp       21      570.50  XLON           xeaNdOKQFu@     
 09-12-2025        16:28:28    GBp       23      570.50  XLON           xeaNdOKQFu0     
 09-12-2025        16:28:28    GBp       100     570.50  XLON           xeaNdOKQFu2     
 09-12-2025        16:28:12    GBp       618     570.50  XLON           xeaNdOKQFJ8     
 09-12-2025        16:28:12    GBp       13      570.50  XLON           xeaNdOKQFJJ     
 09-12-2025        16:28:12    GBp       500     570.50  XLON           xeaNdOKQFJL     
 09-12-2025        16:28:12    GBp       241     570.50  XLON           xeaNdOKQFJN     
 09-12-2025        16:24:04    GBp       203     571.00  XLON           xeaNdOKQ9@W     
 09-12-2025        16:24:04    GBp       1,051   571.00  XLON           xeaNdOKQ9@Y     
 09-12-2025        16:24:03    GBp       1,834   571.00  XLON           xeaNdOKQ9@@     
 09-12-2025        16:24:03    GBp       1,073   571.00  XLON           xeaNdOKQ9vn     
 09-12-2025        16:24:03    GBp       713     571.00  XLON           xeaNdOKQ9vp     
 09-12-2025        16:24:03    GBp       114     571.00  XLON           xeaNdOKQ9vr     
 09-12-2025        16:23:43    GBp       233     570.50  XLON           xeaNdOKQ9LY     
 09-12-2025        16:23:43    GBp       1,476   570.50  XLON           xeaNdOKQ9L1     
 09-12-2025        16:23:43    GBp       196     570.50  XLON           xeaNdOKQ9L3     
 09-12-2025        16:23:43    GBp       35      570.50  XLON           xeaNdOKQ9L5     
 09-12-2025        16:23:43    GBp       475     570.50  XLON           xeaNdOKQ9L7     
 09-12-2025        16:23:43    GBp       356     570.00  XLON           xeaNdOKQ9LC     
 09-12-2025        16:23:43    GBp       594     570.50  XLON           xeaNdOKQ9LE     
 09-12-2025        16:23:43    GBp       194     570.50  XLON           xeaNdOKQ9LG     
 09-12-2025        15:54:30    GBp       489     571.00  XLON           xeaNdOKRGjW     
 09-12-2025        15:54:30    GBp       227     571.00  XLON           xeaNdOKRGjY     
 09-12-2025        15:51:24    GBp       367     571.00  XLON           xeaNdOKRVIX     
 09-12-2025        15:51:22    GBp       762     571.00  XLON           xeaNdOKRVUF     
 09-12-2025        15:47:22    GBp       365     571.50  XLON           xeaNdOKRP5E     
 09-12-2025        15:47:22    GBp       1,164   571.50  XLON           xeaNdOKRP4W     
 09-12-2025        15:44:43    GBp       1,334   571.50  XLON           xeaNdOKR5XW     
 09-12-2025        15:39:47    GBp       610     572.00  XLON           xeaNdOKRFQV     
 09-12-2025        15:37:19    GBp       212     572.00  XLON           xeaNdOKRBm3     
 09-12-2025        15:28:49    GBp       693     572.50  XLON           xeaNdOKK@QI     
 09-12-2025        15:28:49    GBp       161     572.50  XLON           xeaNdOKK@QK     
 09-12-2025        15:28:13    GBp       84      573.50  XLON           xeaNdOKK$9x     
 09-12-2025        15:28:13    GBp       263     573.50  XLON           xeaNdOKK$9z     
 09-12-2025        15:22:00    GBp       835     573.00  XLON           xeaNdOKKdOC     
 09-12-2025        15:20:30    GBp       917     573.50  XLON           xeaNdOKKbVH     
 09-12-2025        15:20:30    GBp       483     573.50  XLON           xeaNdOKKbVJ     
 09-12-2025        15:20:30    GBp       820     573.50  XLON           xeaNdOKKbUa     
 09-12-2025        15:20:30    GBp       359     573.50  XLON           xeaNdOKKbUc     
 09-12-2025        15:20:30    GBp       211     573.50  XLON           xeaNdOKKbUe     
 09-12-2025        15:20:30    GBp       250     573.50  XLON           xeaNdOKKbUg     
 09-12-2025        15:20:30    GBp       556     573.50  XLON           xeaNdOKKbUi     
 09-12-2025        15:20:30    GBp       295     573.00  XLON           xeaNdOKKbUu     
 09-12-2025        15:20:30    GBp       13      573.00  XLON           xeaNdOKKbUw     
 09-12-2025        15:20:30    GBp       350     573.00  XLON           xeaNdOKKbUy     
 09-12-2025        15:16:15    GBp       289     573.50  XLON           xeaNdOKKiAf     
 09-12-2025        15:12:17    GBp       164     574.00  XLON           xeaNdOKKNh7     
 09-12-2025        15:12:17    GBp       194     574.00  XLON           xeaNdOKKNh9     
 09-12-2025        15:12:17    GBp       349     574.00  XLON           xeaNdOKKNga     
 09-12-2025        15:12:17    GBp       35      574.00  XLON           xeaNdOKKNgc     
 09-12-2025        15:12:17    GBp       250     574.00  XLON           xeaNdOKKNge     
 09-12-2025        15:12:17    GBp       159     574.00  XLON           xeaNdOKKNgg     
 09-12-2025        15:12:17    GBp       134     574.00  XLON           xeaNdOKKNgW     
 09-12-2025        15:12:17    GBp       233     574.00  XLON           xeaNdOKKNgY     
 09-12-2025        15:10:59    GBp       343     573.50  XLON           xeaNdOKKLve     
 09-12-2025        15:05:34    GBp       636     573.00  XLON           xeaNdOKKQj6     
 09-12-2025        15:02:25    GBp       443     573.50  XLON           xeaNdOKK7Qn     
 09-12-2025        15:02:25    GBp       212     573.50  XLON           xeaNdOKK7Qp     
 09-12-2025        15:02:25    GBp       663     574.00  XLON           xeaNdOKK7Qu     
 09-12-2025        14:57:57    GBp       325     574.00  XLON           xeaNdOKKERs     
 09-12-2025        14:57:57    GBp       6       574.00  XLON           xeaNdOKKERu     
 09-12-2025        14:54:03    GBp       6       573.50  XLON           xeaNdOKK8HZ     
 09-12-2025        14:53:09    GBp       472     574.00  XLON           xeaNdOKLshi     
 09-12-2025        14:53:09    GBp       576     574.00  XLON           xeaNdOKLshk     
 09-12-2025        14:53:09    GBp       742     574.00  XLON           xeaNdOKLshq     
 09-12-2025        14:53:09    GBp       1,155   574.00  XLON           xeaNdOKLshw     
 09-12-2025        14:53:09    GBp       16      574.00  XLON           xeaNdOKLshy     
 09-12-2025        14:53:09    GBp       20      574.00  XLON           xeaNdOKLsh@     
 09-12-2025        14:53:09    GBp       403     574.00  XLON           xeaNdOKLsh0     
 09-12-2025        14:53:09    GBp       495     574.00  XLON           xeaNdOKLsh2     
 09-12-2025        14:53:09    GBp       186     574.00  XLON           xeaNdOKLsh4     
 09-12-2025        14:48:36    GBp       1,200   573.50  XLON           xeaNdOKLnWl     
 09-12-2025        14:48:36    GBp       32      573.50  XLON           xeaNdOKLnWn     
 09-12-2025        14:48:06    GBp       303     574.00  XLON           xeaNdOKLnUQ     
 09-12-2025        14:48:05    GBp       311     574.00  XLON           xeaNdOKLnRR     
 09-12-2025        14:48:05    GBp       310     574.00  XLON           xeaNdOKL@cv     
 09-12-2025        14:48:04    GBp       305     574.00  XLON           xeaNdOKL@cV     
 09-12-2025        14:48:04    GBp       306     574.00  XLON           xeaNdOKL@X7     
 09-12-2025        14:48:04    GBp       303     574.00  XLON           xeaNdOKL@Wh     
 09-12-2025        14:48:04    GBp       308     574.00  XLON           xeaNdOKL@Wt     
 09-12-2025        14:48:04    GBp       308     574.00  XLON           xeaNdOKL@W5     
 09-12-2025        14:48:03    GBp       509     574.00  XLON           xeaNdOKL@Zg     
 09-12-2025        14:40:52    GBp       426     573.00  XLON           xeaNdOKLaMV     
 09-12-2025        14:40:52    GBp       303     573.00  XLON           xeaNdOKLaHX     
 09-12-2025        14:40:52    GBp       709     572.50  XLON           xeaNdOKLaHm     
 09-12-2025        14:25:34    GBp       459     572.00  XLON           xeaNdOKLS2h     
 09-12-2025        14:25:34    GBp       177     572.00  XLON           xeaNdOKLS2j     
 09-12-2025        14:21:38    GBp       30      571.50  XLON           xeaNdOKLPZK     
 09-12-2025        14:18:23    GBp       32      571.50  XLON           xeaNdOKL4Ub     
 09-12-2025        14:17:02    GBp       641     572.00  XLON           xeaNdOKL2KH     
 09-12-2025        14:17:02    GBp       991     572.00  XLON           xeaNdOKL2N0     
 09-12-2025        14:03:11    GBp       462     572.00  XLON           xeaNdOKMoSp     
 09-12-2025        14:03:11    GBp       459     572.00  XLON           xeaNdOKMoS8     
 09-12-2025        13:55:33    GBp       198     570.50  XLON           xeaNdOKMwTa     
 09-12-2025        13:55:33    GBp       11      570.50  XLON           xeaNdOKMwTc     
 09-12-2025        13:55:14    GBp       53      571.00  XLON           xeaNdOKMxkf     
 09-12-2025        13:55:14    GBp       1       571.00  XLON           xeaNdOKMxkh     
 09-12-2025        13:55:14    GBp       248     571.00  XLON           xeaNdOKMxkj     
 09-12-2025        13:55:03    GBp       713     571.50  XLON           xeaNdOKMxwV     
 09-12-2025        13:53:53    GBp       421     572.00  XLON           xeaNdOKMu9A     
 09-12-2025        13:53:05    GBp       435     572.50  XLON           xeaNdOKMvD@     
 09-12-2025        13:53:05    GBp       328     572.50  XLON           xeaNdOKMvD0     
 09-12-2025        13:51:58    GBp       190     573.50  XLON           xeaNdOKMdaD     
 09-12-2025        13:51:58    GBp       333     573.00  XLON           xeaNdOKMdaG     
 09-12-2025        13:51:05    GBp       699     573.50  XLON           xeaNdOKMacA     
 09-12-2025        13:51:05    GBp       100     573.50  XLON           xeaNdOKMacC     
 09-12-2025        13:51:03    GBp       353     573.50  XLON           xeaNdOKMaYu     
 09-12-2025        13:49:16    GBp       63      573.50  XLON           xeaNdOKMYcG     
 09-12-2025        13:49:16    GBp       212     573.50  XLON           xeaNdOKMYcK     
 09-12-2025        13:49:16    GBp       364     572.50  XLON           xeaNdOKMYcT     
 09-12-2025        13:49:16    GBp       522     573.00  XLON           xeaNdOKMYcV     
 09-12-2025        13:32:00    GBp       535     573.50  XLON           xeaNdOKMHkD     
 09-12-2025        13:29:35    GBp       77      574.00  XLON           xeaNdOKMVUf     
 09-12-2025        13:29:33    GBp       666     574.00  XLON           xeaNdOKMVUU     
 09-12-2025        13:28:40    GBp       345     574.00  XLON           xeaNdOKMSK4     
 09-12-2025        13:28:26    GBp       803     574.50  XLON           xeaNdOKMTdA     
 09-12-2025        13:28:08    GBp       167     575.50  XLON           xeaNdOKMTsK     
 09-12-2025        13:28:08    GBp       38      575.50  XLON           xeaNdOKMTsM     
 09-12-2025        13:18:35    GBp       329     574.50  XLON           xeaNdOKM3Yb     
 09-12-2025        13:18:35    GBp       227     574.00  XLON           xeaNdOKM3YZ     
 09-12-2025        13:16:49    GBp       77      575.00  XLON           xeaNdOKM0MK     
 09-12-2025        13:16:49    GBp       302     575.00  XLON           xeaNdOKM0MM     
 09-12-2025        13:16:00    GBp       2       575.50  XLON           xeaNdOKM18Z     
 09-12-2025        13:16:00    GBp       343     575.50  XLON           xeaNdOKM18d     
 09-12-2025        13:08:54    GBp       214     575.50  XLON           xeaNdOKM81c     
 09-12-2025        13:07:19    GBp       208     575.50  XLON           xeaNdOKM9NG     
 09-12-2025        13:07:19    GBp       306     575.50  XLON           xeaNdOKM9NV     
 09-12-2025        13:07:19    GBp       340     575.50  XLON           xeaNdOKM9Mt     
 09-12-2025        13:07:19    GBp       518     575.50  XLON           xeaNdOKM9Mz     
 09-12-2025        12:48:30    GBp       204     575.50  XLON           xeaNdOKNaDW     
 09-12-2025        12:48:30    GBp       174     575.50  XLON           xeaNdOKNaDY     
 09-12-2025        12:31:47    GBp       443     575.00  XLON           xeaNdOKNKmZ     
 09-12-2025        12:11:51    GBp       88      575.50  XLON           xeaNdOKN7ZS     
 09-12-2025        12:11:44    GBp       315     576.00  XLON           xeaNdOKN7iR     
 09-12-2025        12:10:47    GBp       765     576.00  XLON           xeaNdOKN7NC     
 09-12-2025        09:00:30    GBp       58      576.00  XLON           xeaNdOKIJZ7     
 09-12-2025        08:58:05    GBp       320     575.50  XLON           xeaNdOKIHOW     
 09-12-2025        08:56:03    GBp       94      576.00  XLON           xeaNdOKISZi     
 09-12-2025        08:55:02    GBp       168     575.50  XLON           xeaNdOKITiw     
 09-12-2025        08:55:02    GBp       22      575.50  XLON           xeaNdOKITiy     
 09-12-2025        08:52:24    GBp       5       575.00  XLON           xeaNdOKIRIo     
 09-12-2025        08:52:24    GBp       185     575.00  XLON           xeaNdOKIRIq     
 09-12-2025        08:47:48    GBp       313     572.50  XLON           xeaNdOKI4Ub     
 09-12-2025        08:47:48    GBp       449     573.00  XLON           xeaNdOKI4Ud