Holding(s) in Company

TR-1: Standard form for notification of major holdings

NOTIFICATION OF MAJOR HOLDINGS (to be sent to the relevant issuer and to the FCA in Microsoft Word format if possible)i
1a. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attachedii:			OSB GROUP PLC
1b. Please indicate if the issuer is a non-UK issuer (please mark with an “X” if appropriate)
Non-UK issuer
2. Reason for the notification (please mark the appropriate box or boxes with an “X”)
An acquisition or disposal of voting rights						X
An acquisition or disposal of financial instruments						X
An event changing the breakdown of voting rights
Other (please specify)iii:
3. Details of person subject to the notification obligationiv
Name			GLG Partners LP
City and country of registered office (if applicable)			London, United Kingdom
4. Full name of shareholder(s) (if different from 3.)v
Name
City and country of registered office (if applicable)
5. Date on which the threshold was crossed or reachedvi:			02/09/2024
6. Date on which issuer notified (DD/MM/YYYY):			03/09/2024
7. Total positions of person(s) subject to the notification obligation
	% of voting rights attached to shares (total of 8. A)	% of voting rights through financial instruments (total of 8.B 1 + 8.B 2)		Total of both in % (8.A + 8.B)	Total number of voting rights held in issuervii
Resulting situation on the date on which threshold was crossed or reached	Less than 5%	Less than 5%		5.135744%	19,651,690.00
Position of previous notification (if applicable)	Less than 5%	Less than 5%		Less than 5%

8. Notified details of the resulting situation on the date on which the threshold was crossed or reachedviii
A: Voting rights attached to shares
Class/type of shares ISIN code (if possible)	Number of voting rightsix		% of voting rights
	Direct (DTR5.1)	Indirect (DTR5.2.1)	Direct (DTR5.1)	Indirect (DTR5.2.1)
Equity: GB00BLDRH360
SUBTOTAL 8. A	Less than 5%		Less than 5%

B 1: Financial Instruments according to DTR5.3.1R (1) (a)
Type of financial instrument	Expiration datex	Exercise/ Conversion Periodxi	Number of voting rights that may be acquired if the instrument is exercised/converted.	% of voting rights
		SUBTOTAL 8. B 1

B 2: Financial Instruments with similar economic effect according to DTR5.3.1R (1) (b)
Type of financial instrument	Expiration datex	Exercise/ Conversion Period xi	Physical or cash settlementxii	Number of voting rights	% of voting rights
Swap			Cash Settlement	Less than 5%	Less than 5%
			SUBTOTAL 8.B.2	Less than 5%	Less than 5%

9. Information in relation to the person subject to the notification obligation (please mark the applicable box with an “X”)
Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuerxiii				X
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 entityxiv (please add additional rows as necessary)
Namexv	% of voting rights if it equals or is higher than the notifiable threshold	% of voting rights through financial instruments if it equals or is higher than the notifiable threshold	Total of both if it equals or is higher than the notifiable threshold
10. In case of proxy voting, please identify:
Name of the proxy holder
The number and % of voting rights held
The date until which the voting rights will be held
11. Additional informationxvi

Place of completion	London
Date of completion	03/09/2024