| Aci Directors Limited | Corporate Nominee Director | 22 Jul 2004 | 16 Aug 2004 | United Kingdom | - |
| Aci Secretaries Limited | Corporate Nominee Secretary | 22 Jul 2004 | 16 Aug 2004 | United Kingdom | - |
| Adrian Richard Hill | Director | 16 Aug 2004 | 31 Dec 2005 | British | 68 years |
| Andrew Ray Mielczarek | Director | 15 Aug 2008 | 13 Oct 2011 | British | 56 years |
| Aseem Munshi | Director | 2 May 2014 | 19 May 2017 | Indian | 51 years |
| Bryan Leitch | Director | 12 Oct 2011 | 21 Jan 2015 | British | 66 years |
| Clive John Rivers | Director | 30 Dec 2005 | 15 Aug 2008 | British | 68 years |
| Clive John Rivers | Secretary | 16 Aug 2004 | 1 Jul 2011 | British | - |
| Emma Marie Walkley | Director | 25 Mar 2022 | 29 Sept 2022 | British | 51 years |
| Fiona Macdonald Mccaffrey | Director | 16 Oct 2018 | 31 Dec 2021 | British | 55 years |
| James Pearson | Director | 19 Jan 2006 | 28 Feb 2012 | British | 53 years |
| Jonathan Lee Gerard Byrne | Director | 2 May 2014 | 19 Jun 2015 | British | 57 years |
| Karen Lyon | Secretary | 1 Jul 2011 | 15 Apr 2013 | - | - |
| Katherine Dean | Secretary | 15 Apr 2013 | 26 Mar 2014 | - | - |
| Lorna Youssouf | Secretary | 27 Jun 2018 | 21 Sept 2018 | - | - |
| Lynne Leatherbarrow | Director | 2 May 2014 | 13 Jan 2016 | British | 61 years |
| Madhusudan Kejriwal | Director | 16 Jun 2017 | 5 Aug 2020 | Indian | 46 years |
| Madhusudan Kejriwal | Director | 14 Oct 2022 | 22 Nov 2024 | British | 46 years |
| Mark James Saxon | Director | 8 Jan 2016 | 22 May 2019 | British | 53 years |
| Pragnaa Raju | Secretary | 23 Feb 2021 | 23 Nov 2022 | - | - |
| Roger Vincent Lovering | Director | 16 Aug 2004 | 19 Jan 2006 | British | 67 years |
| Stuart Arthur Haire | Director | 19 May 2017 | 1 Dec 2018 | British | 52 years |
| Sulagna Goswami | Secretary | 11 Feb 2019 | 23 Feb 2021 | - | - |
| Syeeda Ollite | Secretary | 26 Mar 2014 | 27 Jun 2018 | - | - |
| Thomas Geoffrey Wolfenden | Director | 19 Aug 2021 | 15 Nov 2023 | British | 50 years |
| Tracy Amanda Pearce | Director | 1 Oct 2018 | 26 May 2021 | British | 53 years |
| Vincent Laurent Reboul | Director | 28 Feb 2012 | 2 May 2014 | French | 60 years |