3 June 2026

Elementis plc

Commencement of share buyback programme

Further to the announcement of 2 June 2026, Elementis plc ("Elementis" or the "Company"), announces that from today it will commence a programme to purchase up to approximately £25m (equivalent to approximately $35m) of the Company's ordinary shares of 5 pence each (the "Ordinary Shares") (the "Programme") by no later than 28 February 2027.

The purpose of the Programme is to reduce the Company's share capital and accordingly the Company intends to cancel the majority of shares repurchased, with a proportion retained in treasury to meet obligations under the Company's employee share scheme. Any purchases will be conducted in compliance with the relevant conditions for trading, restrictions regarding time and volume, disclosure and reporting obligations, and price conditions. The Company confirms that it currently has no unpublished Inside Information.

The Programme will be conducted by the Company in accordance with and under the terms of the general authority granted by the Company's shareholders at the Company's Annual General Meeting on 29 April 2026 which authority will expire at the end of the next Annual General Meeting of the Company in 2027 or, if earlier, 1 July 2027 ("2026 Authority"). The Company has appointed Rothschild & Co Global Markets Solutions Limited ("Rothschild & Co") to manage the Programme and has issued an irrevocable instruction to Rothschild & Co to continue to manage the Programme, within pre-set parameters, during any closed period. This appointment will continue until 28 February 2027 (unless terminated earlier in accordance with its terms), subject to automatic extension in certain circumstances. The Programme will be carried out on the London Stock Exchange and other trading venues^[1] and executed within the parameters of the Market Abuse Regulation 596/2014/EU and the Commission Delegated Regulation 2016/1052/EU (as each forms part of domestic law under the European Union (Withdrawal) Act 2018, including where relevant pursuant to the Market Abuse (Amendment) (EU Exit) Regulations 2019) and Chapter 9 of the UK Listing Rules of the Financial Conduct Authority. Transactions undertaken under the Programme will be disclosed by way of a Regulatory Information Service announcement on a weekly basis.

The aggregate maximum consideration payable by the Company in respect of the purchase of shares under the Programme up to 28 February 2027 is up to approximately £25m (equivalent to approximately $35m). The maximum number of shares that may be purchased under the Programme is 56,931,567 (being the number of shares able to be purchased under the 2026 Authority).

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About Elementis

Elementis is a global specialty chemicals company listed on the London Stock Exchange. The Group employs c.1,000 across 18 global locations. As recognised innovation leaders with deep expertise in rheology (the science of flow), and formulation solutions, we develop distinctive solutions and products to improve performance, achieve smoother production, and enhance sustainability credentials for customers across a range of industries. The Group also owns and operates one of the largest known commercial high-quality hectorite mines in the world. Hectorite is a special, high-purity clay mineral rich in magnesium and lithium, known for its ability to control viscosity, stabilise formulations, and deliver smooth, consistent textures that make it ideal for clean-label, high-performance formulations. 

Elementis is composed of two focused, high-margin businesses: Personal Care and Coatings. The Personal Care business manufactures natural and synthetic rheology modifiers to deliver premium product performance for personal care applications in skin care and cosmetics, as well as active ingredients for antiperspirants. Within Coatings, Elementis develops and manufactures rheology modifiers and premium performance additives for decorative and industrial paints and coatings. The Coatings business also includes our Energy and Adhesives, Sealants and Construction additives businesses.