Transaction in Own Shares

Summary by AI ^BETAClose X

OSB Group PLC has purchased 1,519,438 ordinary shares on the London Stock Exchange, CBOE BXE, CBOE CXE, and Aquis Exchange between May 11 and May 15, 2026, as part of its ongoing share buyback program. The repurchased shares will be cancelled, reducing the total number of ordinary shares in issue to 346,025,922. The volume-weighted average prices paid for these shares ranged from approximately 484.25p to 513.99p.

Disclaimer*

OSB GROUP PLC
ISIN: GB00BLDRH360
18 May 2026

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that, for the period from 11 May 2026 to 15 May 2026, inclusive, it had purchased a total of 1,519,438 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.

11 May 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	92,324	116,197	26,739	14,096
Highest price paid (per ordinary share)	516.50p	516.50p	516.50p	516.00p
Lowest price paid (per ordinary share)	510.50p	510.50p	510.50p	511.50p
Volume weighted average price paid (per ordinary share)	513.96p	513.96p	513.95p	513.99p

12 May 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	110,985	141,175	32,853	16,808
Highest price paid (per ordinary share)	506.00p	504.00p	504.50p	501.00p
Lowest price paid (per ordinary share)	484.60p	484.00p	484.40p	484.40p
Volume weighted average price paid (per ordinary share)	490.79p	490.85p	490.78p	490.78p

13 May 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	118,472	150,683	35,076	17,944
Highest price paid (per ordinary share)	491.60p	491.60p	491.80p	491.00p
Lowest price paid (per ordinary share)	479.20p	479.00p	479.20p	479.40p
Volume weighted average price paid (per ordinary share)	484.25p	484.26p	484.26p	484.27p

14 May 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	123,234	149,237	35,779	17,460
Highest price paid (per ordinary share)	492.00p	492.00p	492.00p	491.80p
Lowest price paid (per ordinary share)	483.60p	483.60p	483.60p	483.60p
Volume weighted average price paid (per ordinary share)	488.16p	488.20p	488.18p	488.10p

15 May 2026	London Stock Exchange	CBOE BXE	CBOE CXE	Aquis Exchange
Number of ordinary shares purchased	121,060	146,906	35,222	17,188
Highest price paid (per ordinary share)	496.60p	496.00p	496.40p	496.20p
Lowest price paid (per ordinary share)	486.60p	487.40p	487.20p	488.00p
Volume weighted average price paid (per ordinary share)	491.49p	491.48p	491.49p	491.50p

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 346,025,922 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 346,025,922.

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