| Alnery Incorporations No 1 Limited | Corporate Nominee Director | 11 Jun 1991 | 24 Jun 1991 | - | - |
| Alnery Incorporations No 1 Limited | Corporate Nominee Secretary | 11 Jun 1991 | 24 Jun 1991 | - | - |
| Amec Nominees Limited | Corporate Director | 1 Mar 2010 | 11 Aug 2020 | United Kingdom | - |
| Amec Nominees Limited | Corporate Secretary | 12 Jun 1996 | 5 Aug 1996 | United Kingdom | - |
| Andrew Stuart Mclean | Director | 11 Aug 2020 | 31 Aug 2024 | British | 56 years |
| Anthony Robert Brown | Director | 1 Jul 1998 | 30 Jun 2001 | British | 67 years |
| Barry Robert Boyde Pope | Director | 1 Jul 2002 | 29 Jun 2007 | British | 78 years |
| Brian Bentz | Director | 1 Jul 2001 | 12 Nov 2007 | Canadian | 83 years |
| Brian Clayton | Director | 15 Mar 1994 | 12 Jun 1996 | British | 90 years |
| Charles Ian Bateman | Director | 24 Jun 1991 | 28 May 1993 | British | 91 years |
| Christopher Laskey Fidler | Secretary | 24 Jun 1991 | 22 Jul 2016 | British | - |
| Colin Fellowes | Secretary | 20 Dec 2002 | 29 May 2003 | British | - |
| Daniel Terence O'brien | Director | 1 Jul 2002 | 18 May 2005 | British | 80 years |
| David Hoyle | Director | 18 May 2005 | 27 Jul 2007 | British | 65 years |
| David John Hodkinson | Director | 1 Aug 2002 | 6 Oct 2008 | British | 63 years |
| Grant Richmond Ling | Director | 12 Nov 2007 | 2 Aug 2012 | British | 70 years |
| Iain Angus Jones | Secretary | 16 Feb 2018 | 12 Jun 2024 | - | - |
| Ian Graeme Lloyd Charnock | Director | 1 May 2008 | 31 Oct 2008 | British | 64 years |
| Ian John Wolstenholme | Director | 1 Jul 2002 | 12 Nov 2007 | British | 60 years |
| Janet Patricia Chamberlain | Director | 1 Jan 1997 | 12 Nov 2007 | British | 76 years |
| Jennifer Ann Warburton | Secretary | 22 Jul 2016 | 16 Feb 2018 | - | - |
| John Dalton Early | Director | 5 Aug 1996 | 31 Jul 2007 | British | 81 years |
| Jonathan Cowper | Director | 31 Oct 2008 | 1 Mar 2010 | British | 52 years |
| Leslie Anthony Bell | Director | 1 Jan 1999 | 15 Jun 2001 | British | 76 years |
| Matthew Nigel Plant | Director | 2 Aug 2012 | 22 Jul 2024 | British | 58 years |
| Michael John Bardsley | Director | 24 Jun 1991 | 5 Aug 1996 | British | 82 years |
| Michael John Marlow | Director | 24 Jun 1991 | 12 Jun 1996 | British | 79 years |
| Paul Challenger | Director | 1 Jul 2002 | 31 Oct 2005 | British | 78 years |
| Peter Anthony Rogers | Director | 23 Jun 2000 | 12 Nov 2007 | British/canadian | 66 years |
| Phillip Joseph Dodd | Director | 1 Jul 2002 | 12 Nov 2007 | British | 71 years |
| Richard Martin Clampett | Director | 5 Aug 1996 | 3 Jul 2001 | British | 80 years |
| Stephen Charles Todd | Director | 26 Aug 2005 | 30 Mar 2007 | British | 57 years |
| Susan Taberner | Secretary | 1 Aug 2001 | 20 Jun 2003 | British | - |
| William George Setter | Director | 31 Aug 2024 | 21 Mar 2025 | British | 51 years |