| HELLUMS, Rhonda ACTIVE | Secretary | 15 Feb 2024 | | | | PO BOX Nj 07030, 221 River Street, 9th Floor, Hoboken, New Jersey, 07030, United States |
| ROMANO, Steven, Dr ACTIVE | Director | 14 Sep 2023 | | United States | May 1959 | 27, Eastcastle Street, London, W1W 8DH |
| DAVIES, Jon Melvyn RESIGNED | Secretary | 11 Jan 1996 | 27 Feb 2010 | | | 125 Hadlow Road, Tonbridge, Kent, TN9 1QE |
| ELLAM, David John RESIGNED | Secretary | 18 Jul 2016 | 09 Jan 2019 | | | 72, Hammersmith Road, London, W14 8TH, England |
| FREEBORN, Tim RESIGNED | Secretary | 02 Aug 2012 | 19 Jul 2016 | | | 27, Eastcastle Street, London, W1W 8DH, England |
| HERRMANN, Max Stephen RESIGNED | Secretary | 14 May 2010 | 02 Aug 2012 | | | The Royal Institution, 21 Albemarle Street, London, W1S 4BS |
| MURPHY, Sarah RESIGNED | Secretary | 28 Sep 2022 | 22 Dec 2023 | | | 27, Eastcastle Street, London, W1W 8DH |
| QUINN, Robert, Dr RESIGNED | Secretary | 09 Jan 2019 | 01 Dec 2020 | | | 27, Eastcastle Street, London, W1W 8DH |
| RUSKIN, Barbara RESIGNED | Secretary | 01 Dec 2020 | 28 Sep 2022 | | | 27, Eastcastle Street, London, W1W 8DH |
| WARREN, Simon Oliver Henry RESIGNED | Secretary | 20 Oct 1992 | 11 Jan 1996 | | | 93 Chesterfield Drive, Riverhead, Sevenoaks, Kent, TN13 2EQ |
| HALLMARK SECRETARIES LIMITED RESIGNED | Nominee Secretary | 20 Oct 1992 | 20 Oct 1992 | | | 120 East Road, London, N1 6AA |
| BOYLE, Eric James RESIGNED | Director | 20 Oct 1992 | 20 May 2004 | United Kingdom | December 1953 | Mount Pleasant House, Maidstone Road, Marden, Kent, TN12 9AG |
| CAMPION, Giles Victor, Dr RESIGNED | Director | 21 Dec 2020 | 01 Jul 2023 | England | December 1954 | 27, Eastcastle Street, London, W1W 8DH |
| CARSWELL, John Wilson RESIGNED | Director | 23 Jan 1993 | 01 Mar 1995 | | August 1937 | 38 Park Avenue, Orpington, Kent, BR6 9EH |
| DAVIES, Jon Melvyn RESIGNED | Director | 20 Sep 1994 | 27 Feb 2010 | England | January 1956 | 125 Hadlow Road, Tonbridge, Kent, TN9 1QE |
| ELLAM, David John RESIGNED | Director | 18 Jul 2016 | 09 Jan 2019 | England | October 1963 | 72, Hammersmith Road, London, W14 8TH, England |
| FARRER, David John RESIGNED | Director | 18 Jan 2001 | 11 May 2004 | England | May 1956 | 36 Lakelands Close, Macclesfield, Cheshire, SK10 1RF |
| FREEBORN, Timothy Charles Adrian RESIGNED | Director | 02 Aug 2012 | 19 Jul 2016 | United Kingdom | December 1958 | 27, Eastcastle Street, London, W1W 8DH, England |
| HERRMANN, Max Stephen RESIGNED | Director | 14 May 2010 | 02 Aug 2012 | United Kingdom | April 1966 | The Royal Institution, 21 Albemarle Street, London, W1S 4BS |
| HILL, David RESIGNED | Director | 19 May 2003 | 18 Jun 2004 | | September 1950 | 9 Penrose Way, Four Marks, Alton, Hampshire, GU34 5BG |
| KENNARD, David Anthony, Dr RESIGNED | Director | 11 Jan 1996 | 17 Jul 2003 | | January 1960 | 27 Rundell Crescent, Hendon, London, NW4 3BS |
| LANG, Thomas, Dr RESIGNED | Director | 10 Feb 1998 | 21 May 2002 | | September 1949 | 131 Drayton Gardens, West Drayton, Middlesex, UB7 7LH |
| PATTISON, John Ridley, Professor RESIGNED | Director | 03 Mar 1993 | 31 Aug 1999 | | August 1942 | 6 The Lawns Close, Melbourn, Royston, Hertfordshire, SG8 6DR |
| POVEY, Janet Rowan, Dr RESIGNED | Director | 01 Nov 1999 | 06 Oct 2003 | United Kingdom | June 1960 | The Haybarn Home Farm Court, Holdenby, Northamptonshire, NN6 8EE |
| RANDALL, Jeremy Anthony Philip RESIGNED | Director | 27 Feb 2010 | 04 Dec 2013 | United Kingdom | July 1964 | 27, Eastcastle Street, London, W1W 8DH, England |
| ROOK, Graham Arthur William, Professor RESIGNED | Director | 20 Oct 1992 | 23 Jul 2008 | | March 1946 | 94 Hemingford Road, London, N1 1DD |
| ROSA BRUNET, Laura, Dr RESIGNED | Director | 01 Aug 2006 | 21 Nov 2008 | | December 1969 | Floor 26 Centre Point, 103 New Oxford Street, London, WC1A 1DD |
| ROSS, Iain Gladstone RESIGNED | Director | 08 Jan 2020 | 21 Dec 2020 | England | January 1954 | Herons Ghyll, Tilford Road, Tilford, Farnham, GU10 2DD, England |
| ROSS, Iain Gladstone RESIGNED | Director | 02 Aug 2005 | 25 Feb 2010 | England | January 1954 | Herons Ghyll, Tilford Road, Tilford, Surrey, GU10 2DD |
| ROTHERA, Mark RESIGNED | Director | 21 Dec 2020 | 22 Feb 2022 | United States | September 1962 | 27, Eastcastle Street, London, W1W 8DH |
| RUGHEIMER, Iain Nils Hessey RESIGNED | Director | 26 May 2004 | 01 Jul 2008 | United Kingdom | October 1953 | 31 Findon Road, London, W12 9PP |
| SOLOMON, David Horn, Dr RESIGNED | Director | 09 Jan 2019 | 08 Jan 2020 | Denmark | October 1960 | 27, Eastcastle Street, London, W1W 8DH |
| STANFORD, Cynthia Ann RESIGNED | Director | 23 Jan 1993 | 01 Apr 1998 | England | November 1938 | Mill House, Claygate Marden, Tonbridge, Kent, TN12 9PE |
| STANFORD, John Lawson, Dr RESIGNED | Director | 20 Oct 1992 | 23 Sep 2008 | England | October 1938 | The Mill House Claygate, Marden, Tonbridge, Kent, TN12 9PE |
| TOOMAN, Craig RESIGNED | Director | 22 Feb 2022 | 14 Dec 2025 | United States | October 1965 | 27, Eastcastle Street, London, W1W 8DH |
| WARREN, Simon Oliver Henry RESIGNED | Director | 20 Oct 1992 | 01 Apr 1998 | | February 1957 | 93 Chesterfield Drive, Riverhead, Sevenoaks, Kent, TN13 2EQ |
| HALLMARK REGISTRARS LIMITED RESIGNED | Nominee Director | 20 Oct 1992 | 20 Oct 1992 | | | 120 East Road, London, N1 6AA |