| PALMERSTON SECRETARIES LIMITED ACTIVE | Secretary | 01 Jul 2000 | | | | Palmerston House, 814 Brighton Road, Purley, Surrey, CR8 2BR |
| BRILLARELLI, Ilaria ACTIVE | Director | 01 Aug 2022 | | Germany | November 1969 | Venture House, Arlington Square, Downshire Way, Bracknell, RG12 1WA, United Kingdom |
| DEMBERGER, Eric Johannes ACTIVE | Director | 01 May 2026 | | Germany | August 1995 | Venture House, Arlington Square, Downshire Way, Bracknell, RG12 1WA, United Kingdom |
| SUMMO, Peter Alto ACTIVE | Director | 01 Apr 2026 | | Germany | October 1967 | Venture House, Arlington Square, Downshire Way, Bracknell, RG12 1WA, United Kingdom |
| HOFMANN, Oskar Ulrich RESIGNED | Secretary | 19 Feb 1999 | 30 Jun 2000 | | | 5 Kempton Avenue, Sunbury On Thames, Middlesex, TW16 5NG |
| HUGHES, Graham RESIGNED | Secretary | | 31 Dec 1997 | | | Craiglea Loxwood Road, Alfold, Cranleigh, Surrey, GU6 8HL |
| JOHNSON, Jane RESIGNED | Secretary | 01 Jan 1998 | 19 Feb 1999 | | | 2 Arbour Cottages, Rydes Hill Road, Guildford, Surrey, GU2 6UQ |
| BANKS, Desmond Anderson Harvie, Lord RESIGNED | Director | | 04 Feb 1992 | | October 1918 | Lincoln House The Lincolns, Little Kingshill, Great Missenden, Buckinghamshire, HP16 0EH |
| BISHOP, Michael William RESIGNED | Director | 01 Jan 2008 | 01 Jan 2012 | England | November 1950 | 120, Bridge Road, Chertsey, Surrey, KT16 8LA, United Kingdom |
| CLEFF, Eberhard, Dr RESIGNED | Director | | 15 Feb 1993 | | October 1943 | Wacker-Chemie Gmbh, Hanns-Seidel Platz 4, D-8000 Munchen 83, Germany |
| DESCHUYFFELEER, Hugo Maria Livinus RESIGNED | Director | 01 Jul 2002 | 01 Jul 2018 | England | January 1958 | Venture House, Arlington Square, Downshire Way, Bracknell, Berkshire, RG12 1WA, United Kingdom |
| ELCE, George Abraham RESIGNED | Director | | 04 Feb 1992 | | May 1918 | 7 Castle Ings, Spofforth, Harrogate, North Yorkshire, HG3 1BZ |
| ESSLER, Hans, Dr RESIGNED | Director | 15 Feb 1993 | 05 Jul 1996 | | May 1932 | Falkenweg 23, 8025 Unterhaching-Fasanenpark, Germany |
| FEIST, Sieglinde RESIGNED | Director | 01 Jul 2018 | 01 Apr 2026 | Germany | May 1963 | Venture House, Arlington Square, Downshire Way, Bracknell, RG12 1WA, United Kingdom |
| GIFFHORN, Hans-Jurgen, Herr RESIGNED | Director | | 27 Feb 1996 | | November 1936 | Wacker-Chemie Gmbh, Hanns-Seidel Platz 4, 81737 Munich, Germany |
| GROS, Jean-Lionel RESIGNED | Director | 01 Apr 2011 | 01 Jul 2014 | Germany | February 1954 | 120, Bridge Road, Chertsey, Surrey, KT16 8LA, United Kingdom |
| KOINI, Thomas, Dr RESIGNED | Director | 01 Jul 2014 | 01 Apr 2021 | Germany | March 1967 | Venture House, Arlington Square, Downshire Way, Bracknell, Berkshire, RG12 1WA, United Kingdom |
| MOORE, Danielle Paula RESIGNED | Director | 01 Jun 2022 | 01 May 2026 | England | December 1963 | Venture House, Arlington Square, Downshire Way, Bracknell, Berkshire, RG12 1WA, United Kingdom |
| MOORE, Danielle Paula RESIGNED | Director | 01 May 2022 | 01 May 2022 | England | December 1963 | Venture House, Arlington Square, Downshire Way, Bracknell, Berkshire, RG12 1WA, United Kingdom |
| MOORE, Danielle Paula RESIGNED | Director | 01 Jan 2012 | 01 May 2018 | England | December 1963 | Venture House, Arlington Square, Downshire Way, Bracknell, Berkshire, RG12 1WA, United Kingdom |
| NORLEN, Ulf Erik RESIGNED | Director | 01 Sep 2003 | 31 Dec 2007 | | May 1948 | 51 King George Square, Richmond, Surrey, TW10 6LF |
| PFEIFER, Eduard Friedrich Helmuth RESIGNED | Director | | 03 Aug 1995 | | July 1932 | Wacker Chemicals Limited The Clock T, Mount Felix Bridge Street, Walton-On-Thames, Surrey, KT12 1AS |
| PHILIPP, Gerhard RESIGNED | Director | 08 Jul 1996 | 30 Jun 2002 | | December 1940 | Kloosterlaan 32, Bergen 1861 Se, The Netherlands, FOREIGN |
| RAUHUT, Joachim, Dr RESIGNED | Director | 01 Jan 2006 | 01 Apr 2009 | | May 1954 | Emil-Dittler-Str. 7, D-81479 Munchen, Germany |
| RIEMER, Christoph, Dr RESIGNED | Director | 01 Apr 2021 | 01 Aug 2022 | Germany | April 1969 | Venture House, Arlington Square, Downshire Way, Bracknell, RG12 1WA, United Kingdom |
| SCHURENBERG, Robert Helmut Nikolaus RESIGNED | Director | 13 Aug 1995 | 31 Aug 2003 | | August 1940 | 3 Rokeby Place, Wimbledon, London, SW20 0HU |
| THYE, Gabriele RESIGNED | Director | 01 May 2018 | 31 May 2023 | England | May 1960 | Venture House, Downshire Way, Bracknell, Berkshire, RG12 1WA, England |
| WACKER, Peter Alexander, Dr RESIGNED | Director | 27 Feb 1996 | 01 Jan 2006 | | February 1951 | Stuberstrasse 20 Muenchen, D 80638, Germany |
| WILLEMS, Auguste Elly Hubert RESIGNED | Director | 01 Apr 2009 | 31 Mar 2011 | Germany | February 1959 | 120, Bridge Road, Chertsey, Surrey, KT16 8LA, United Kingdom |