Grainger PLC

Pre-Annual General Meeting Information • Jul 30, 2025

Investor Code

30 July 2025

Dear Shareholder

Grainger plc Notice of General Meeting

Thank you for agreeing to receive your shareholder communications from Grainger plc electronically. I am pleased to let you know that the following documents are available to view on the Investor pages on our website https://corporate.graingerplc.co.uk/investors

• Circular (containing notice of General Meeting)
• Proxy card
• Letter to shareholders regarding the meeting arrangements
• Proposed new articles of association

We are holding a General Meeting on 1 September 2025 at 4.15 p.m. at Pinsent Masons LLP, 30 Crown Place, Earl Street, London EC2A 4ES. Shareholders are being asked to vote on a resolution to amend our articles of association ahead of our entry into the REIT regime. We wish to make certain amendments to our articles which are recommended to support our conversion to a REIT and also to make updates more generally as the Articles have not been updated since they were adopted in 2010.

The notice of General Meeting includes details of how shareholders can vote, including information about electronic voting. The circular (containing the notice of General Meeting), proxy card, shareholder letter and the proposed new articles of association will be submitted to the National Storage Mechanism ("NSM") and will shortly be available for inspection at data.fca.org.uk/#/nsm/ nationalstoragemechanism.

Please read these documents carefully. If you have any doubt about the action you should take, please contact your stockbroker, bank manager, solicitor, accountant or independent advisor.

If you wish to attend the General Meeting, please print the Notice and bring it with you as it will speed up your entry into the meeting.

Shareholder attendance at the General Meeting is in person. In addition, the Company will also provide facilities so that Shareholders can ask questions of the Board remotely which will be answered and published on the Company's website in advance of the General Meeting.

Grainger plc

Citygate St James' Boulevard Newcastle Upon Tyne NE1 4JE T +44 (0)191 261 1819

graingerplc.co.uk

Shareholders are strongly urged to cast their votes by proxy in advance of the General Meeting in order to ensure that their votes are counted. All votes will be held by poll so that all proxy votes are included.

Online Proxy Voting

If you would like to vote on the resolutions please send us your vote by completing your proxy form online through the Shareholder portal at www.signalshares.com. The person you appoint need not be a shareholder of the Company.

You will require your username and password to log in and vote. If you have forgotten your username or password you can request a reminder via the Shareholder portal www.signalshares.com. If you haven't previously registered to use the portal you will require your investor code ("IVC") which can be found above.

The completed form needs to be received by our registrars, MUFG Corporate Markets, before 4.15 p.m. on 28 August 2025. Alternatively, you can vote via the LinkVote+ app, Proxymity, or CREST (please refer to the notes in the notice of General Meeting).

Voting by proxy does not affect your right to attend the General Meeting and vote in person. If you have any questions regarding voting online or finding documents on the website, please contact MUFG Corporate Markets at shareholderenquiries@cm.mpms.mufg.com or call the Shareholder Helpline on 0371 664 0300 between 9.00 a.m. – 5.30 p.m., Monday to Friday excluding public holidays in England and Wales (calls are charged at the standard geographic rate and will vary by provider. Calls outside the United Kingdom will be charged at the applicable international rate).

Yours faithfully

Sapna B FitzGerald Company Secretary