Director/PDMR Shareholding

LEI: 213800ZBKL9BHSL2K459

28 April 2025

OSB GROUP PLC
(the Company)

Notification of Transactions of Persons Discharging Managerial Responsibilities (PDMRs) and Persons Closely Associated (PCA)

The Company was notified that Jason Elphick (a PDMR) sold 7,205 ordinary shares of £0.01 each in the Company, on 28 April 2025. His PCA purchased 651 ordinary shares of £0.01 each in the Company on 28 April 2025.

The following notification made under Article 19 of the UK Market Abuse Regulation ("UK MAR") relates to a transaction by a PDMR in the shares of the Company.

1. Details of the person discharging managerial responsibilities / person closely associated
Name of natural person	Jason Elphick
2. Reason for the notification
a. Position/status	Group General Counsel and Company Secretary
b. Initial notification/amendment	Initial Notification
3. Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a. Full name of the entity	OSB GROUP PLC
b. Legal Entity Identifier code	213800ZBKL9BHSL2K459
4. Details of the transaction(s):
a. Description of the financial instrument, type of instrument	Ordinary shares of £0.01 each
Identification code	GB00BLDRH360
b. Nature of Transaction	Sale of 7,205 shares via nominee account
c. Price(s) and Volume(s)	Price	Volume
	£4.675178	7,205
d. Aggregated Information:	Aggregated volume 7,205 Aggregated price £33,684.66
e. Date of transaction	28 April 2025
f. Place of transaction	London Stock Exchange, Main Market (XLON)

1. Details of the person discharging managerial responsibilities / person closely associated
Name of natural person	Louis Emmanuel Elphick
2. Reason for the notification