OSB : Holding(s) in Company

OSB.L

TR-1: Standard form for notification of major holdings

1. Issuer Details ISIN GB00BLDRH360 Issuer Name OSB GROUP PLC UK or Non-UK Issuer UK 2. Reason for Notification An acquisition or disposal of voting rights 3. Details of person subject to the notification obligation Name Jupiter Fund Management PLC City of registered office (if applicable) London Country of registered office (if applicable) United Kingdom 4. Details of the shareholder

5. Date on which the threshold was crossed or reached 13-Oct-2021 6. Date on which Issuer notified 14-Oct-2021 7. Total positions of person(s) subject to the notification obligation

8. Notified details of the resulting situation on the date on which the threshold was crossed or reached 8A. Voting rights attached to shares

8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))

8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

9. Information in relation to the person subject to the notification obligation 2. Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entities (please add additional rows as necessary)

10. In case of proxy voting Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

11. Additional Information

12. Date of Completion 14.10.202113. Place Of Completion London, UK

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