X0202 SCHEDULE 13G/A 0000950157-24-001447 0001633094 XXXXXXXX LIVE 7 Ordinary Shares 09/30/2026 0001639877 Ferroglobe PLC G33856108 13 Chesterfield Street London X0 W1J 5JN Rule 13d-1(d) Grupo Villar Mir, S.A.U. U3 58265434.00 0.00 58265434.00 8490000.00 66755434.00 N 35.7 OO Note to Item 1: The percent ownership is calculated based upon an aggregate of 186,908,299 Ordinary Shares outstanding as of October 8, 2026, as notified to Grupo Villar Mir, S.A.U. by Ferroglobe PLC. Ferroglobe PLC 13 Chesterfield Street, London, W1J 5JN, United Kingdom Grupo Villar Mir, S.A.U. Torre Espacio Paseo de la Castellana, 259 D, Planta 46N 28046 Madrid, Spain Grupo Villar Mir, S.A.U. is a Spanish public limited liability company in the form of a sociedad anonima The information in Item 1 and Items 5 through 11 on the cover pages of this Schedule 13G is incorporated herein by reference. Y Y Y Y Y Y Grupo Villar Mir, S.A.U. /s/ Manuel Garrido Ruano 10/09/2026