Transaction in Own Shares

10 August 2026

Elementis plc ("Elementis" or the "Company")

Transaction in Own Shares

Elementis announces that, in accordance with the terms of its share buyback programme announced on 3 June 2026 (the "Share Buyback Programme"), the Company purchased the following number of its own ordinary shares of 5p each (the "Ordinary Shares") through Rothschild & Co Global Markets Solutions Limited ("Rothschild & Co") in the period 03 August to 07 August 2026

Date

Venue

Weighted averageprice paid pershare (GBp)

Aggregate numberof shares

Lowest pricepaid pershare (GBp)

Highest pricepaid pershare (GBp)

03/08/26

London Stock Exchange

178.3993

49,266

177.0000

180.0000

Turquoise Exchange

178.7666

3,876

177.6000

180.0000

Chi-X Europe

178.3280

13,965

177.0000

179.8000

Bats Trading Europe

178.2727

13,794

177.0000

179.8000

04/08/26

London Stock Exchange

177.5709

48,648

176.0000

178.6000

Turquoise Exchange

177.6666

3,816

176.4000

178.6000

Chi-X Europe

177.6818

14,344

176.0000

178.6000

Bats Trading Europe

177.7123

14,214

176.4000

178.6000

05/08/26

London Stock Exchange

179.5972

58,420

178.0000

180.6000

Turquoise Exchange

179.3333

3,912

178.8000

179.8000

Chi-X Europe

179.5142

8,876

179.0000

180.0000

Bats Trading Europe

179.5238

13,335

179.0000

180.0000

06/08/26

London Stock Exchange

183.3518

48,026

180.0000

185.8000

Turquoise Exchange

183.5230

8,476

181.2000

185.4000

Chi-X Europe

183.7368

8,535

181.4000

185.6000

Bats Trading Europe

183.4832

13,545

181.2000

185.4000

07/08/26

London Stock Exchange

186.6663

55,792

185.6000

187.8000

Turquoise Exchange

186.5059

3,995

185.6000

187.6000

Chi-X Europe

186.6358

14,639

185.6000

187.8000

Bats Trading Europe

186.6862

18,715

185.6000

187.8000

Of the 418,189 Ordinary Shares purchased during the period, all will be held in treasury.

Following settlement of the above purchases, the Company will hold 506,685 Ordinary Shares in treasury. The Company's total issued share capital comprises 568,503,085 Ordinary Shares (including those held in treasury). Accordingly, the total number of voting rights in the Company is 567,996,400. This figure for the total number of Ordinary Shares carrying voting rights in the Company may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA's Disclosure Guidance and Transparency Rules.

In accordance with Article 5(1)(b) of Regulation (EU) No 596/2014 (as incorporated into UK domestic law by the European Union (Withdrawal) Act 2018), a schedule of individual trades made by Rothschild & Co is available using the following:

http://www.rns-pdf.londonstockexchange.com/rns/9886P_1-2026-8-10.pdf

For further details:

Elementis plc

Contact

Title

Telephone

Hannah Constantine

Chief Legal and People Officer

+44 20 8148 5966