| RISINO, Anthony, Mr. ACTIVE | Director | 15 Jun 2020 | | England | August 1968 | Tenax Road, Trafford Park, Manchester, M17 1wt, United Kingdom |
| THOMPSON, Steven ACTIVE | Director | 04 Nov 2021 | | England | April 1964 | Accounts Department, Tenax Road, Trafford Park, Manchester, M17 1WT, England |
| DICKSON, Trevor James RESIGNED | Secretary | 12 Jul 2004 | 31 Jan 2005 | | | Bayer House, Strawberry Hill, Newbury, Berkshire, RG14 1JA |
| FLETT, Christopher James RESIGNED | Secretary | 30 Nov 2007 | 15 Jun 2020 | | | 71 Lottage Road, Aldbourne, Marlborough, Wiltshire, SN8 2EB |
| NEWSON, Martin David RESIGNED | Secretary | 31 Jan 2005 | 31 Dec 2007 | | | Tudor Dell, May Avenue, Lymington, Hampshire, SO41 9DQ |
| NEWSON, Martin David RESIGNED | Secretary | 25 Aug 2001 | 12 Jul 2004 | | | 30 Abberbury Road, Iffley, Oxford, Oxfordshire, OX4 4ES |
| PENNSEC LIMITED RESIGNED | Nominee Secretary | 16 Dec 1997 | 25 Aug 2001 | | | Abacus House, 33 Gutter Lane, London, EC2V 8AR |
| ABERG, Lennart Thorsten RESIGNED | Director | 04 Apr 2002 | 31 Dec 2002 | | March 1942 | Dower House Stoke Court Drive, Stoke Poges, Slough, Berkshire, SL2 4LH |
| COE, David RESIGNED | Director | 04 Feb 2003 | 31 Jan 2005 | | December 1955 | Bayer House, Strawberry Hill, Newbury, Berkshire, RG14 1JA |
| COURTH, Lambert RESIGNED | Director | 05 Dec 2002 | 31 Jan 2005 | | March 1946 | Bayer House, Strawberry Hill, Newbury, Berkshire, RG14 1JA |
| FIORE, Dennis John RESIGNED | Director | 16 Dec 1997 | 05 Aug 1998 | | June 1951 | 38, Zachary Drive, Chalfont, Pennsylvania, 18914, Usa |
| HELLWIG, Olaf Joerg RESIGNED | Director | 06 Feb 2008 | 05 Mar 2008 | Germany | May 1965 | 100 Rheinuferstrasse, Krefled, North Rheine Westflalia 47829, Germany |
| KLEIN, Richard RESIGNED | Director | 16 Dec 1997 | 15 Feb 2001 | | October 1937 | 369, Kings Highway, Cherry Hill, New Jersey, 08034, Usa |
| LADIN, Steven Frederick RESIGNED | Director | 05 Aug 1998 | 04 Apr 2002 | | December 1946 | 26 Elkington Drive, Mount Laurel, New Jersey 08054, United States Of America, FOREIGN |
| LLOYD, Terence Leslie, Dr RESIGNED | Director | 31 Jan 2005 | 30 Jun 2006 | | June 1946 | 4 Medway Drive, Allestree, Derby, Derbyshire, DE22 2UB |
| LOPEZ REMON, Luis RESIGNED | Director | 08 Mar 2005 | 10 Jan 2010 | Germany | September 1957 | Victoria Str 99, Wuppertal, 42115, Germany |
| O'CONNOR, Kiern Mark RESIGNED | Director | 15 May 2006 | 31 Oct 2018 | United Kingdom | November 1951 | 7, Lamtarra Way, Newbury, Berkshire, RG14 7WB, England |
| PEREZ, Jacques Louis Albert RESIGNED | Director | 31 Oct 2018 | 04 Nov 2021 | United Kingdom | April 1962 | Lanxess Solutions Uk Limited, Tenax Road, Trafford Park, Manchester, M17 1WT, England |
| POTT, Richard, Dr RESIGNED | Director | 15 Feb 2001 | 31 Jan 2005 | | May 1953 | Im Rosengarten 4, Leverkusen, D-51381 Nrw, Germany |
| SCHMITZ, Wolfgang RESIGNED | Director | 31 Jan 2005 | 08 Mar 2005 | | June 1953 | Bayer House, Strawberry Hill, Newbury, Berkshire, RG14 1JA |
| UNWIN, Martin RESIGNED | Director | 04 Apr 2002 | 31 Dec 2002 | | July 1949 | 17 Wansey Gardens, Manor Fields, Newbury, Berkshire, RG14 2SJ |