OSB GROUP PLC - Transaction in Own Shares and Total Voting Rights

OSB GROUP PLC
ISIN: GB00BLDRH360
3 August 2026

LEI number: 213800ZBKL9BHSL2K459

OSB GROUP PLC (the “Company”)
Share Buyback Programme – Transactions in Own Shares and Total Voting Rights

The Company announces that, for the period from 27 July 2026 to 31 July 2026, inclusive, it had purchased a total of 45,798 of its ordinary shares of £0.01 each (the "ordinary shares") on the London Stock Exchange, CBOE BXE ,CBOE CXE and Aquis Exchange, through the Company’s broker Jefferies International Limited as detailed below. The repurchased ordinary shares will be cancelled.

27 July 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	694	660	152	95
Highest price paid (per ordinary share)	566.50p	566.50p	566.50p	565.50p
Lowest price paid (per ordinary share)	560.00p	560.00p	560.00p	560.50p
Volume weighted average price paid (per ordinary share)	563.33p	563.34p	563.34p	563.34p

28 July 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	1,184	1,156	264	164
Highest price paid (per ordinary share)	562.00p	562.00p	562.00p	562.00p
Lowest price paid (per ordinary share)	553.50p	553.50p	553.50p	554.00p
Volume weighted average price paid (per ordinary share)	557.96p	557.98p	557.91p	558.05p

29 July 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	0	0	0	0
Highest price paid (per ordinary share)	0.00p	0.00p	0.00p	0.00p
Lowest price paid (per ordinary share)	0.00p	0.00p	0.00p	0.00p
Volume weighted average price paid (per ordinary share)	0.00p	0.00p	0.00p	0.00p

30 July 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	0	0	0	0
Highest price paid (per ordinary share)	0.00p	0.00p	0.00p	0.00p
Lowest price paid (per ordinary share)	0.00p	0.00p	0.00p	0.00p
Volume weighted average price paid (per ordinary share)	0.00p	0.00p	0.00p	0.00p

31 July 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	18,372	16,644	4,064	2,349
Highest price paid (per ordinary share)	568.00p	567.50p	568.00p	567.50p
Lowest price paid (per ordinary share)	555.50p	555.50p	555.50p	555.50p
Volume weighted average price paid (per ordinary share)	559.53p	559.55p	559.54p	559.55p

The purchases form part of the Company's share buyback programme announced on 5 March 2026.

Following settlement of the above purchases and cancellation of the purchased ordinary shares, the Company's total number of ordinary shares in issue shall be 341,505,131 ordinary shares.

No ordinary shares are in held treasury. Therefore, the total number of voting rights in the Company is 341,505,131 and may be used by shareholders (and others with notification obligations) as the denominator for the calculation by which they will determine if they are required to notify their interest in, or a change in their interest in, the Company under the Financial Conduct Authority’s Disclosure Guidance and Transparency Rules.

In accordance with Article 5(2)(b) of Regulation (EU) No 596/2024 as incorporated into and implemented under English law (including by virtue of the European Union (Withdrawal) Act 2028), the detailed breakdown of individual trades made by Jefferies International Limited on behalf of the Company as part of the share buyback programme is set out below.

This announcement does not constitute, or form part of, an offer or any solicitation of an offer for securities in any jurisdiction.

Schedule of Purchases

Issuer Name	OSB GROUP PLC
LEI	223800ZBKL9BHSL2K459
ISIN	GB00BLDRH360
Intermediary Name	Jefferies International Limited
Intermediary Code	JEFFGB2XXXX
Timezone	GMT
Currency	GBP

Individual Transactions:

Please see attached PDF for full list of transactions.

 LEI: 213800WTQKOQI8ELD692

Attachment

• 2026.07.31_OSBG Buyback Fills