6^th June 2024

Johnson Matthey Plc

(the "Company")

Annual Report and Accounts 2024

The Company announces that it has today published its Annual Report and Accounts 2024 ("the Annual Report") and Notice of Annual General Meeting ("the Notice"). Both documents are available to view and download from the Company's website at https://matthey.com/investors

In accordance with Listing Rules 9.6.1 and 9.6.3, a copy of the Annual Report (which will be available in unedited full text and structured electronic format) and the Notice, together with the Form of Proxy for the Company's Annual General Meeting, have been submitted to the National Storage Mechanism and will shortly be available for inspection at https://data.fca.org.uk/#/nsm/nationalstoragemechanism

The Annual General Meeting of the Company will be held at 11.00 am on Thursday 18^th July 2024 at Herbert Smith Freehills, Exchange House, Primrose Street, London EC2A 2EG. A live webcast and telephone conference will also be available and details of how to join are contained in the Notice.

For the purposes of complying with the Financial Conduct Authority's Disclosure Guidance and Transparency Rules ('DTRs') and the requirements imposed on issuers through the DTRs, information required to be communicated with the media in unedited full text is included in the Annual Report and Accounts 2024.

This announcement is made in accordance with DTR 6.3.5R(1A).

Johnson Matthey Plc is listed on the London Stock Exchange (JMAT)

Registered in England & Wales number: 00033774
Legal Entity Identifier number: 2138001AVBSD1HSC6Z10