| HADDOUK, Jennifer Aurelie Mathilde ACTIVE | Secretary | 30 Jun 2026 | | | | C/O Weir Minerals Europe Limited, Halifax Road, Todmorden, OL14 5RT, England |
| JONES, Franklin Randolph ACTIVE | Director | 21 May 2021 | | United States | November 1973 | C/O Weir Minerals Europe Limited, Halifax Road, Todmorden, OL14 5RT, England |
| STITZEL, Adam Dale ACTIVE | Director | 20 Feb 2026 | | Belgium | October 1976 | C/O Weir Minerals Europe Limited, Halifax Road, Todmorden, OL14 5RT, England |
| MCSHANNON, Gordon Alan RESIGNED | Secretary | 30 Aug 2000 | 01 Jan 2001 | | | The Cuttings New Lane, Sprotborough, Doncaster, South Yorkshire, DN5 7RR |
| MCSHANNON, John RESIGNED | Secretary | 01 Jan 2001 | 18 Jul 2011 | | | 9 Sheaf Crescent, Bolton Upon Dearne, Rotherham, South Yorkshire, S63 8JN |
| ROBINSON, Stephen Beresford RESIGNED | Secretary | 18 Jul 2011 | 30 Jun 2026 | | | C/O Weir Minerals Europe Limited, Halifax Road, Todmorden, OL14 5RT, England |
| THOMAS, Kevin Scott RESIGNED | Secretary | 18 Jul 2011 | 11 Jul 2018 | | | 2141, Nw 25th Avenue, Portland, Oregon 97210-2578, United States |
| WEISSHAAR, Meredith RESIGNED | Secretary | 11 Jul 2018 | 31 Jan 2019 | | | 2141, Nw 25th Avenue, Portland, 97210, United States |
| HAMMOND SUDDARDS SECRETARIES LIMITED RESIGNED | Nominee Secretary | 06 Apr 2000 | 30 Aug 2000 | | | 7 Devonshire Square, London, EC2M 4YH |
| ABEL, Todd William RESIGNED | Director | 21 May 2021 | 29 Dec 2023 | United States | May 1964 | Esco Hydra (Uk) Limited, Ings Road, Doncaster, DN5 9SN, United Kingdom |
| COLLINS, Calvin William RESIGNED | Director | 18 Jul 2011 | 17 Sep 2012 | Usa | October 1958 | 2141, Nw 25th Avenue, Portland, Oregon 97210-2578, Usa |
| FITZGERALD, Sean Stanley RESIGNED | Director | 04 Apr 2023 | 30 Jun 2026 | United States | January 1969 | C/O Weir Minerals Europe Limited, Halifax Road, Todmorden, OL14 5RT, England |
| FONNER, Francis Patrick RESIGNED | Director | 18 Jul 2011 | 17 Sep 2012 | Usa | July 1949 | 2141, Nw 25th Avenue, Portland, Oregon 97210-2578, Usa |
| GOULBOURN, Anthony Paul RESIGNED | Director | 01 Jul 2001 | 18 Jul 2011 | England | February 1950 | Stag House, High Street, Stoney Middleton, Derbyshire, S32 4TL |
| KASKARIAN, Philippe RESIGNED | Director | 01 Jan 2018 | 31 Mar 2026 | France | February 1963 | Esco Hydra (Uk) Limited, Ings Road, Doncaster, DN5 9SN, United Kingdom |
| KERSHAW, Jeffrey Walter RESIGNED | Director | 17 Sep 2012 | 21 Oct 2015 | United States Of America | June 1966 | 2141, Nw 25th Avenue, Portland, Oregon 97210, Usa |
| LIAN, Aaron Benjamin RESIGNED | Director | 18 Jul 2011 | 01 Apr 2013 | Belgium | December 1969 | Rue Des, Fours A Chaux, Frameries, 7080, Belgium |
| MCSHANNON, Gordon Alan RESIGNED | Director | 30 Aug 2000 | 18 Jul 2011 | England | May 1950 | The Cuttings New Lane, Sprotborough, Doncaster, South Yorkshire, DN5 7RR |
| MCSHANNON, John RESIGNED | Director | 27 Aug 2002 | 18 Jul 2011 | England | May 1947 | 9 Sheaf Crescent, Bolton Upon Dearne, Rotherham, South Yorkshire, S63 8JN |
| MORTON, Paul RESIGNED | Director | 10 Nov 2000 | 18 Jul 2011 | United Kingdom | June 1961 | Brookfield, Chain House Lane, Whitestake, Preston, Lancashire, PR4 4LD |
| NEILSON, Andrew James RESIGNED | Director | 15 Jul 2020 | 04 Apr 2023 | United States | November 1975 | Esco Hydra (Uk) Limited, Ings Road, Doncaster, DN5 9SN, United Kingdom |
| OWENS, Jon RESIGNED | Director | 17 Sep 2012 | 15 Jul 2020 | United States | May 1962 | 2141, Nw 25th Avenue, Portland, Oregon 97210, United States |
| SIMONUTTI, Ermanno RESIGNED | Director | 30 Jul 2019 | 01 May 2021 | United States | May 1970 | Esco Hydra (Uk) Limited, Ings Road, Doncaster, DN5 9SN, United Kingdom |
| SIMONUTTI, Ermanno RESIGNED | Director | 01 Apr 2013 | 31 Dec 2017 | Belgium | May 1970 | Esco Hydra (Uk) Limited, Ings Road, Doncaster, DN5 9SN, United Kingdom |
| WARREN, John Joseph RESIGNED | Director | 30 Aug 2000 | 18 Jul 2011 | England | October 1951 | 23 Roe Croft Close, Sprotbrough, Doncaster, South Yorkshire, DN5 7QB |
| WEBER, Joseph Theodore RESIGNED | Director | 21 Oct 2015 | 30 Apr 2019 | United States | May 1961 | Rotherham Works, Wortley Road, Rotherham, South Yorkshire, S61 1LZ, United Kingdom |
| HAMMOND SUDDARDS DIRECTORS LIMITED RESIGNED | Nominee Director | 06 Apr 2000 | 30 Aug 2000 | | | 7 Devonshire Square, London, EC2M 4YH |