OSB GROUP PLC - Transaction in Own Shares

OSB GROUP PLC
ISIN: GB00BLDRH360
27 July 2026

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that, for the period from 20 July 2026 to 24 July 2026, inclusive, it had purchased a total of 14,243 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.

20 July 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	1,344	1,542	305	186
Highest price paid (per ordinary share)	562.00p	561.50p	561.50p	560.50p
Lowest price paid (per ordinary share)	550.00p	551.00p	549.50p	553.00p
Volume weighted average price paid (per ordinary share)	556.17p	556.19p	556.13p	556.12p

21 July 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	1,193	1,328	272	160
Highest price paid (per ordinary share)	559.50p	559.50p	559.50p	559.50p
Lowest price paid (per ordinary share)	551.00p	551.00p	551.00p	551.00p
Volume weighted average price paid (per ordinary share)	555.46p	555.52p	555.46p	555.86p

22 July 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	826	895	183	112
Highest price paid (per ordinary share)	564.00p	564.00p	564.00p	563.50p
Lowest price paid (per ordinary share)	555.50p	556.50p	555.00p	556.50p
Volume weighted average price paid (per ordinary share)	560.91p	560.91p	560.93p	560.95p

23 July 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	1,672	1,592	364	225
Highest price paid (per ordinary share)	559.00p	559.50p	559.00p	558.50p
Lowest price paid (per ordinary share)	550.00p	550.00p	549.50p	550.50p
Volume weighted average price paid (per ordinary share)	553.75p	553.71p	553.67p	553.64p

24 July 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	890	841	191	122
Highest price paid (per ordinary share)	562.50p	562.50p	562.00p	562.00p
Lowest price paid (per ordinary share)	557.00p	557.00p	557.00p	558.00p
Volume weighted average price paid (per ordinary share)	559.71p	559.69p	559.69p	559.80p

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 341,550,929 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 341,550,929.

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.

Attachment

• 2026.07.24_OSBG Buyback Fills