Transaction in Own Shares

05 October 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 28 September to 02 October 2026

Date

Venue

Weighted averageprice paid pershare (GBp)

Aggregate numberof shares

Lowest pricepaid pershare (GBp)

Highest pricepaid pershare (GBp)

28/09/26

London Stock Exchange

177.5036

54,240

176.2000

178.4000

Turquoise Exchange

177.4000

3,832

177.0000

178.2000

Chi-X Europe

177.3846

5,681

176.2000

178.0000

Bats Trading Europe

177.2952

9,219

176.0000

178.0000

29/09/26

London Stock Exchange

175.3611

58,139

174.0000

177.2000

Turquoise Exchange

175.2923

2,819

174.0000

176.0000

Chi-X Europe

175.5865

4,887

174.2000

177.2000

Bats Trading Europe

175.4645

9,155

173.8000

176.8000

30/09/26

London Stock Exchange

178.6380

26,096

175.4000

181.0000

Turquoise Exchange

178.5150

1,688

176.8000

180.2000

Chi-X Europe

178.6156

2,868

176.6000

180.4000

Bats Trading Europe

178.0411

3,712

175.4000

179.6000

01/10/26

London Stock Exchange

176.7329

80,318

174.6000

179.4000

Turquoise Exchange

178.3499

1,354

177.4000

178.8000

Chi-X Europe

178.8000

465

178.8000

178.8000

Bats Trading Europe

178.5634

2,863

177.6000

179.0000

02/10/26

London Stock Exchange

177.0713

61,912

175.8000

178.6000

Turquoise Exchange

177.4500

1,864

176.4000

178.4000

Chi-X Europe

177.2121

3,144

175.4000

178.2000

Bats Trading Europe

177.3136

8,080

176.4000

178.6000

Following settlement of the above purchases and cancellation of the purchased ordinary shares, the Company's total number of ordinary shares in issue shall be 568,160,749. The Company holds 3,026,535 ordinary shares in treasury and therefore the total voting rights in the Company will be 565,134,214. This figure for the total number of voting rights 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/6689X_1-2026-10-5.pdf

For further details:

Elementis plc

Contact

Contact

Telephone

Hannah Constantine

Chief Legal and People Officer

+44 20 8148 5966