Extension of Share Buyback Programme

Grafton Group plc (the "Company"), the international building materials distributor and DIY retailer, is pleased to announce its decision to extend its existing share buyback programme (the "Programme"), originally due to expire on 31 January 2024, for a further five months to 31 May 2024, and to increase the maximum aggregate consideration for the Programme by a further £50 million (resulting in a total maximum aggregate consideration of £100 million being allocated to the Programme).

The maximum number of shares which can be repurchased under the Programme is 15,679,817, subject at all times to the applicable authority granted by shareholders to repurchase the Company's ordinary shares in issue (including, for the avoidance of doubt, pursuant to any renewed authority granted by shareholders at the 2024 AGM of the Company). The purpose of the Programme is to reduce the share capital of the Company in line with this announcement.

The Programme will continue to be conducted within the parameters prescribed by the Market Abuse Regulation 596/2014 and the Commission Delegated Regulation (EU) 2016/1052 (also as in force in the UK, from time to time, including, where relevant, pursuant to the UK's European Union (Withdrawal) Act 2018 and the Market Abuse (Amendment) (EU Exit) Regulations 2019) as well as the applicable laws and regulations of the UK Financial Conduct Authority.

Save as set out herein, the Programme will otherwise operate under the same terms as previously announced on 31 August 2023.

The Company will make further announcements in due course following any buy back of Shares. There is no guarantee that the Programme will be implemented in full or that any shares will be bought back by the Company.