Johnson Matthey: Agreed completion date for sale of CT

JM and Honeywell Technologies agree completion date for the sale of Catalyst Technologies

Further to the announcement made on 3^rd July 2026, Johnson Matthey Plc ("JM") confirms that JM and Honeywell Technologies ("Honeywell") have agreed a completion date of
17^th July 2026 for the sale of JM's Catalyst Technologies business to Honeywell. Completion of the transaction will be subject to and in accordance with the provisions of the SPA dated
21^st May 2025 between JM and Honeywell (as amended). JM will make a further announcement upon completion in due course.

The person responsible for the release of this announcement is Simon Price, General Counsel and Company Secretary of JM.

ENDS

Enquiries:

Investor Relations

Louise Curran

Head of Investor Relations

+44 20 7269 8235

Media

Gill Corish

Head of External Communications (Interim)

+44 20 7269 8001

Guy Bates

Kekst CNC

+44 7581 056 415