Director Declaration

27^th February 2026

Johnson Matthey Plc

Director Declaration

In accordance with UK Listing Rule 6.4.9R(2), Johnson Matthey PLC ("Johnson Matthey") announces that John O'Higgins, a Non-Executive Director of Johnson Matthey, is expected to be appointed as Non-Executive Chair of Technip Energies NV ("Technip Energies") with effect from the Technip Energies' AGM on 5^th May 2026.

ENDS

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

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