| LAMB, David ACTIVE | Secretary | 12 Jun 2019 | | | | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| ALEXANDER, Miles Barrington ACTIVE | Director | 17 Aug 2026 | | England | July 1966 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| BRADLEY, Daniel Thomas ACTIVE | Director | 17 Apr 2026 | | United Kingdom | December 1975 | Salica Investments Limted, 6-8 Greencoat Place, London, SW1P 1PL, England |
| BROWN, Scott Selby Durrand, Dr ACTIVE | Director | 01 Jun 2009 | | United Kingdom | March 1963 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB, United Kingdom |
| CASTILLO, Ruth ACTIVE | Director | 15 Jun 2026 | | United States | February 1977 | C/O Ingevity Corporation, 4920 O'Hear Avenue, Suite 400, North Charleston, South Carolina, 29405, United States |
| CUMMINGS, Russell ACTIVE | Director | 16 Jan 2019 | | United Kingdom | June 1964 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| DOBSON, Stephen Graham ACTIVE | Director | 01 Nov 2022 | | United Kingdom | July 1960 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| HORVAT, Gary ACTIVE | Director | 24 Jan 2023 | | United States | September 1955 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| HOSTY, Andrew Joseph, Dr ACTIVE | Director | 15 May 2020 | | England | February 1965 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| JUNG, Woosung ACTIVE | Director | 02 Jan 2023 | | South Korea | August 1974 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| LAMB, David ACTIVE | Director | 12 Jun 2019 | | England | August 1975 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| BLACK, Michael Peter RESIGNED | Secretary | 01 Sep 2012 | 12 Jun 2019 | | | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB, United Kingdom |
| ELLISON, John Kevin RESIGNED | Secretary | 20 Jun 2006 | 31 Aug 2012 | | | 3 Lansdown Crescent, Bath, BA1 5EX |
| ALDWYCH SECRETARIES LIMITED RESIGNED | Secretary | 22 Feb 2006 | 01 Aug 2006 | | | 9400 Garsington Road, Oxford Business Park, Oxford, OX4 2HN |
| ATHERTON, Paul David, Dr RESIGNED | Director | 06 Apr 2006 | 07 Sep 2018 | United Kingdom | May 1953 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| BLACK, Michael Peter RESIGNED | Director | 31 Jul 2012 | 12 Jun 2019 | United Kingdom | August 1965 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB, United Kingdom |
| CUMMINGS, Russell RESIGNED | Director | 24 May 2007 | 31 Dec 2016 | United Kingdom | June 1964 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| GREEN, Mino, Professor RESIGNED | Director | 06 Apr 2006 | 16 Jul 2014 | United Kingdom | March 1927 | 55 Gerard Road, Barnes, London, SW13 9QH |
| JENKS, Ian Tudor RESIGNED | Director | 27 Jan 2015 | 31 Dec 2022 | United Kingdom | May 1954 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| KELLY, Thomas Francis RESIGNED | Director | 02 Dec 2025 | 15 Jun 2026 | United States | May 1965 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| KNIEHASE, Christoph Andreas Gustav Max, Dr RESIGNED | Director | 25 Jan 2022 | 16 Nov 2023 | Germany | January 1971 | Wacker Chemie Ag, Hanns-Seidel-Platz 4, Munich, 81737, Germany |
| KOWITZ, Christoph, Dr RESIGNED | Director | 11 Sep 2019 | 25 Jan 2022 | Germany | May 1968 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| LIM, Stephen Sukjung RESIGNED | Director | 25 Jan 2022 | 02 Jan 2023 | South Korea | October 1960 | Seoul Finance Center, 136 Sejong-Daero, Jung-Gu, Seoul, South Korea |
| LINCOLN, Robin Lewis RESIGNED | Director | 04 Jun 2021 | 16 Apr 2026 | United Kingdom | March 1971 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| MACKLIN, William James, Dr RESIGNED | Director | 23 Oct 2008 | 18 Nov 2013 | United Kingdom | September 1960 | Southernwood Cottage, Cat Street, East Hendred, Wantage, Oxon, OX12 8JT |
| MCCOMB, Christina Margaret RESIGNED | Director | 30 Aug 2007 | 30 Sep 2020 | England | May 1956 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| MCDONALD, Ian RESIGNED | Director | 23 Oct 2008 | 30 Apr 2012 | United Kingdom | July 1955 | 48 Churchward Close, Grove, Wantage, Oxon, OX12 0QZ |
| NEAT, Robin, Dr RESIGNED | Director | 22 Feb 2006 | 12 Mar 2008 | | September 1960 | 9 Broome Close, Yateley, Hampshire, GU46 7SY |
| NEEDHAM, Benjamin RESIGNED | Director | 23 Mar 2023 | 02 Dec 2025 | United States | March 1988 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| OBERHOLZ, Alfred, Dr RESIGNED | Director | 22 Nov 2009 | 02 Feb 2012 | Germany | April 1952 | 3, Allensteiner Strasse, Marl, 45770, Germany |
| PITCHFORD, Nigel Aaron, Dr RESIGNED | Director | 01 Jan 2017 | 10 Feb 2018 | England | October 1969 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| POSAWATZ, Anthony Leo RESIGNED | Director | 01 Jan 2015 | 31 Dec 2022 | United States | April 1960 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| RIPPLE, Erik Spencer RESIGNED | Director | 29 Jul 2022 | 27 Feb 2023 | United States | January 1970 | Ingevity 4920, O'Hear Avenue, North Charleston, South Carolina, United States |
| VASARA, Antti Henrick Alex RESIGNED | Director | 01 Jan 2015 | 01 Jan 2019 | Finland | November 1965 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
| VOLLBRACHT, Jamie RESIGNED | Director | 06 Mar 2018 | 18 Apr 2018 | Scotland | February 1982 | 136, Eastern Avenue, Milton Park, Abingdon, Oxfordshire, OX14 4SB |
IP2IPO SERVICES LIMITED RESIGNEDRegistration number 05325867 | Director | 18 Apr 2018 | 11 Sep 2019 | | | 25, Walbrook, London, EC4N 8AF, United Kingdom |