Directorate change

This announcement contains inside information for the purposes of Article 7 of the Market Abuse Regulation (EU) 596/2014 of 16 April 2014 which forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018.

Appointment of Non-Executive Chair and Non-Executive Director

Elementis plc ("Elementis" or the "Group") is pleased to announce the appointment of Trudy Schoolenberg as Non-Executive Chair with effect from the end of the Annual General Meeting on 29 April 2026. Trudy will succeed John O'Higgins who announced in October 2026 that he would not stand for re-election.

Trudy has served as Non-Executive Senior Independent Director of Elementis since April 2022. She has around 35 years' experience in the chemicals, engineering and high‑performance product sectors, including ten years as a Senior Independent Director. Trudy also serves as Chair of Accsys Technologies PLC. Trudy's deep experience means she is exceptionally well placed to lead the Board of Elementis as it enters its next phase of growth. Trudy will continue as a member of the Remuneration Committee and will chair the Nomination Committee.

Christine Soden, Non-Executive Director, will be appointed as interim Senior Independent Director. Christine will continue in her current committee roles.

Elementis is also pleased to announce the appointment of Mike Humphrey as an Independent Non-Executive Director with effect from 29 April 2026, the date of its forthcoming AGM. Mike will bring significant leadership and operational experience in the specialty chemicals sector, having been Chief Executive Officer of Croda International plc from 1999 to 2011, playing a crucial role in reshaping its strategic focus on specialty markets. During Mike's tenure, Croda developed into a focused, innovation-led business with strong margins, global reach and a premium market positioning.

Trudy Schoolenberg, Chair designate and Non-Executive Director, said:

"I am delighted to be appointed Chair and look forward to working with Mike and the rest of the Board to support Luc van Ravenstein and the Leadership Team as they deliver our Elevate Elementis strategy."

Luc van Ravenstein, CEO, said:

"I would like to congratulate Trudy on her appointment as Chair. Her broad international experience, deep knowledge of the industry and respected position within Elementis make her the right leader at this important juncture for the business. I am also very pleased to welcome Mike, whose expertise will bring additional strength and depth to the Board."

There are no further disclosures required in respect of this announcement under UKLR.6.4.8.

The person responsible for the release of this announcement on behalf of Elementis plc is Hannah Constantine, Group General Counsel and Company Secretary.

Enquiries

LEI: 549300LQIH685LI2ML36