REG-Block listing Interim Review

OsbAnnouncement

Mon 09:30

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LEI: 213800ZBKL9BHSL2K459

BLOCK LISTING SIX MONTHLY RETURN

Information provided on this form must be typed or printed electronically and
provided to an ris.

(Note: Italicised terms have the same meaning as given in the Listing Rules.)

Date: 01 December 2025

 Name of applicant :                                                                                                                             OSB GROUP PLC                                       
 Name of schemes:                                                                                                                                1. Sharesave Scheme                                 
                                                                                                                                                 2. Deferred Share Bonus Plan                        
                                                                                                                                                 3. Performance Share Plan                           
 Period of return:                                                       From:                                                                   1 June 2025      To:              30 November 2025  
 Balance of unallotted securities under scheme(s) from previous return:                                                                          1. 1,220,102 Ordinary Shares of £0.01 each          
                                                                                                                                                 2. 377,056 Ordinary Shares of £0.01 each            
                                                                                                                                                 3. 2,495,577 Ordinary Shares of £0.01 each          
 Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):      1. 0 Ordinary Shares of £0.01 each                  
                                                                                                                                                 2. 0 Ordinary Shares of £0.01 each                  
                                                                                                                                                 3. 0 Ordinary Shares of £0.01 each                  
 Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):                                                        1. 49,053 Ordinary Shares of £0.01 each             
                                                                                                                                                 2. 24,954 Ordinary Shares of £0.01 each             
                                                                                                                                                 3. 0 Ordinary Shares of £0.01 each                  
 Equals: Balance under scheme(s) not yet issued/allotted at end of period:                                                                       1. 1,171,049 Ordinary Shares of £0.01 each          
                                                                                                                                                 2. 352,102 Ordinary Shares of £0.01 each            
                                                                                                                                                 3. 2,495,577 Ordinary Shares of £0.01 each          



 Name of contact:                        Jason Elphick  
 Telephone number of contact:            01634 848 944