OSB GROUP PLC - Holding(s) in Company
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
Lorentzweiler Adjacent Partners S.C.Sp.
City of registered office (if applicable)
Howald
Country of registered office (if applicable)
Luxembourg
4.  Details of the shareholder
Full name of shareholder(s) if different from the person(s) subject to the notification obligation, above
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City of registered office (if applicable)
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Country of registered office (if applicable)
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5.  Date on which the threshold was crossed or reached
01-Sep-2026
6.  Date on which Issuer notified
03-Sep-2026
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 issuer |
| Resulting situation on the date on which threshold was crossed or reached | 3.096900 | 0.000000 | 3.096900 | 10509837 |
| Position of previous notification (if applicable) | Â | Â | Â | Â |
8.  Notified details of the resulting situation on the date on which the threshold was crossed or reached
8A. Voting rights attached to shares
| Class/Type of shares ISIN code(if possible) | Number of direct voting rights (DTR5.1) | Number of indirect voting rights (DTR5.2.1) | % of direct voting rights (DTR5.1) | % of indirect voting rights (DTR5.2.1) |
| GB00BLDRH360 | 10509837 | 0 | 3.096900 | 0.000000 |
| Sub Total 8.A | 10509837 | Â | 3.096900% |
8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))
| Type of financial instrument | Expiration date | Exercise/conversion period | Number of voting rights that may be acquired if the instrument is exercised/converted | % of voting rights |
| Sub Total 8.B1 | Â | Â | Â |
8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))
| Type of financial instrument | Expiration date | Exercise/conversion period | Physical or cash settlement | Number of voting rights | % of voting rights |
| Sub Total 8.B2 | Â Â | Â | Â | Â | Â |
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)
| Ultimate controlling person | Name of controlled undertaking | % 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 |
| Alan Waxman | Â | 3.096900 | Â | 3.096900% |
| Alan Waxman | Sixth Street Partners Management Company, L.P. | 3.096900 | Â | 3.096900% |
| Alan Waxman | TAO Finance 3, LLC | 1.858100 | Â | 1.858100% |
| Alan Waxman | Beacon Finance 3, LLC | 0.619400 | Â | 0.619400% |
| Alan Waxman | Sixth Street Madrone Strategic Holdings I, L.P | 0.619400 | Â | 0.619400% |
| Alan Waxman | Lorentzweiler Adjacent Partners, S.C.Sp (acting through its general partner, Lorentzweiler Adjacent Investments, S.Ã r.l.) | 3.096900 | Â | 3.096900% |
10.    In case of proxy voting
Name of the proxy holder
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The number and % of voting rights held
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The date until which the voting rights will be held
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If date does not apply, explain below
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11.    Additional Information
Lorentzweiler Adjacent Partners S.C.Sp is owned (i) 60% by TAO
Finance 3, LLC, which is controlled by its manager, Sixth Street TAO GenPar, L.P., (ii) 20% by Beacon Finance 3, LLC, which is controlled by its general partner, Sixth Street ABF Beacon GenPar I, L.P., and (iii) 20% by Sixth Street Madrone Strategic Holdings I, L.P. which is controlled by its general partner, Sixth Street Madrone Strategic Holdings GenPar, L.P.. Its general partner, Lorentzweiler Adjacent Investments, S.Ã r.l., is owned equally by such persons.
Each of foregoing entities are ultimately indirectly controlled by Sixth
Street Partners Management Company, L.P. Sixth Street Partners Management Company, L.P. is managed by its general partner, whose managing member is Alan Waxman.
Mr. Waxman disclaims beneficial ownership of the shares that are the subject of this notification except to the extent of his pecuniary interest therein.
12.    Date of Completion
03-Sep-2026
13.    Place Of Completion
Luxembourg
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