7 March 2024

Elementis plc (the "Company") - Directorate changes

Elementis plc (ELM.L) (the "Company"), global specialty chemicals company, today announces the appointment of Maria Ciliberti as a Non-Executive Director with effect from 11 March 2024. Maria will join the Audit, Nomination and Remuneration Committees.

Maria is President for the USA and Canada businesses at Royal Vopak, a global infrastructure provider, and has spent over 35 years in the petrochemical industry, having previously worked at The Dow Chemical Company, Columbia Gas of Ohio and Container Corporation of America in the USA. Maria has also spent over a decade in global leadership roles in Europe, with Celanese, GE Plastics (now part of SABIC) and Borealis.

Maria holds a Bachelor of Science degree in Chemical Engineering and an MBA, both from The Ohio State University.

Steve Good will retire from the Board at the conclusion of the Annual General Meeting on 30 April 2024 ("AGM"), as planned. Steve's responsibilities as chair of the Remuneration Committee will transfer to Clement Woon following the AGM.

John O'Higgins, Chair of Elementis, said:

"I am delighted to welcome Maria to the Elementis Board. Maria has an excellent track record in senior management roles in the chemicals industry, both in the US and in Europe. She has had extensive operational experience as well as having covered strategic and marketing roles.

On behalf of the Board, I would like to thank Steve for his outstanding contribution to the Board and its Committees during his tenure, and to wish him well for the future."

The Company confirms that there are no other matters requiring disclosure pursuant to LR 9.6.13R (1) to (6) in respect of Maria Ciliberti's appointment.

Anna Lawrence

Group General Counsel & Company Secretary

020 7067 2999

LEI: 549300LQIH685LI2ML36