REG — Elementis PLC — Transaction in Own Shares

For best results when printing this announcement, please click on link below: RNS Number: 6461V Elementis PLC 21 September 2026 21 September 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 14 September to 18 September 2026 Date Venue Weighted average Aggregate number Lowest price Highest price price paid per of shares paid per paid per share (GBp) share (GBp) share (GBp) 14/09/26 London Stock Exchange 170.4007 39,120 169.2000 171.4000 Turquoise Exchange 170.4000 4,149 169.8000 170.8000 Chi-X Europe 170.1163 20,000 169.2000 171.2000 Bats Trading Europe 170.3147 14,464 169.0000 171.2000 15/09/26 London Stock Exchange 167.2077 33,024 165.2000 176.6000 Turquoise Exchange 167.4000 4,088 165.4000 169.6000 Chi-X.