CMC Markets PLC

Pre-Annual General Meeting Information • Jun 24, 2022

THIS DOCUMENT IS IMPORTANT AND REQUIRES YOUR IMMEDIATE ATTENTION.

This letter has been provided to you as a shareholder registered to receive such notifications. If you have sold or otherwise transferred all your shares in the Company, please forward this letter to the purchaser or transferee, or to the person who arranged the sale or transfer, so they can pass this letter to the person who now holds the shares. If you are in any doubt as to the action you should take, you should seek your own advice from your stockbroker, solicitor, accountant or other independent adviser authorised under the Financial Services and Markets Act 2000. This letter should not be regarded as a substitute for reading the shareholder documents or relied on as the basis upon which to make decisions. It is recommended that you read the shareholder documents carefully before taking any action.

CMC Markets plc ("CMC Markets" or the "Company") (incorporated in England and Wales under the Companies Act 1985 with registered number 05145017) Notice of availability Annual Report and Accounts 2022 and Notice of Annual General Meeting 2022

17 June 2022

Dear Shareholder,

Please accept this letter as notification that the CMC Markets plc Notice of Annual General Meeting 2022 and Annual Report and Accounts for the year ended 31 March 2022 have now been published on the Company's website at www.cmcmarketsplc.com/investors. To access these documents, you will need to have Adobe Acrobat Reader installed.

The Company's Annual General Meeting ("AGM" or the "Meeting") will be held at 10.00 a.m. on Thursday 28 July 2022 at 133 Houndsditch, London EC3A 7BX.

The Board is looking forward to welcoming shareholders in person to the AGM this year. However, in the event that government restrictions on public gatherings or other social distancing measures are reintroduced, the Company may be required to change the arrangements for the Meeting at short notice. The Board reserves the right to put in place appropriate measures necessary to ensure the health and safety of those attending the Meeting. Any changes to the arrangements set out in the Notice of AGM will be published on the Company's website, www.cmcmarketsplc.com, and announced via a regulatory news service.

Shareholders who are unable to attend the AGM may submit questions relating to the business of the Meeting in advance of the AGM via email to CMCAGMQs@cmcmarketsplc.com by no later than 10.00 a.m. (UK time) on Tuesday 26 July 2022. Responses to any such questions, if appropriate and relevant to the business of the AGM, will be posted for general view at www.cmcmarketsplc.com.

We will also be making arrangements to ensure that the Meeting can be observed via a live webcast. Shareholders will not be able to vote on the resolutions being proposed via these facilities and therefore it is important that shareholders do still cast their votes and submit a proxy appointment in accordance with the recommendation and instructions set out on page 5 of the Notice of AGM.

We would like to take this opportunity to thank you for agreeing to receive shareholder documents via our website rather than in paper form. By viewing documents in this way you are helping the Company to meet its sustainability objectives, cut production and distribution costs and minimise unnecessary paper usage.

If you are unable to locate any of the documents on the webpage or need help with voting, please telephone the Link Group shareholder helpline on 0371 664 0300 (calls to Link are charged at the standard geographic rate and will vary by provider. Lines are open from 9.00 a.m. to 5.30 p.m., Monday to Friday, excluding public holidays in England and Wales. Calls from outside the United Kingdom will be charged at the applicable international rate).

Proxies

Whether or not you are able to attend the AGM in person, please send us your vote by completing and submitting your Form of Proxy online through the website of our registrar, Link Group, at www.cmcmarketsshares.co.uk to be received at least 48 hours before the time of the Meeting.

If you are a CREST member, you should contact your CREST Service Provider, which will be able to help you to vote via the CREST system.

Yours sincerely,

James Richards Chairman