National Storage Mechanism | Additional information

15 December 2025

HOWDEN JOINERY GROUP PLC

("Howdens" or the "Company")

CHANGE OF REGISTRAR

Howdens announces the transfer of its share register from Equiniti to Computershare Investor Services PLC (Computershare), effective today.

A notification will be sent to shareholders advising of this change along with details of how to register for online access to their shareholdings.

Contact details for Computershare are as follows:

Computershare Investor Services PLC

The Pavilions

Bridgwater Road

Bristol

BS99 6ZZ

United Kingdom

+44(0)370 889 0144

www.investorcentre.co.uk

Further information and FAQs are also available on www.howdenjoinerygroupplc.com/FAQs/index.asp.

Enquiries:

Forbes McNaughton, Company Secretary +44(0)207 535 1162

LEI: 213800KC1LJOJTY3JP45

This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact [email protected] or visit www.rns.com.

RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy.

END