| PAPINNIEMI-AINGER, Petra ACTIVE | Secretary | 27 Jun 2016 | | | | C/O Tmf Group,, 13th Floor, One Angel Court, London, EC2R 7HJ, United Kingdom |
| BUGARCIC, Monalito ACTIVE | Director | 31 Aug 2020 | | Switzerland | June 1975 | C/O Tmf Group,, 13th Floor, One Angel Court, London, EC2R 7HJ, United Kingdom |
| WADHAM, Stephen Michael ACTIVE | Director | 12 Mar 2026 | | United Kingdom | March 1984 | Howmet Aerospace, Kestrel Way, Sowton Industrial Estate, Exeter, EX2 7LG, United Kingdom |
| CAMINO, Jose Ramon RESIGNED | Secretary | 04 Mar 2003 | 01 Mar 2014 | | | Alcoa Europe, Ave Giuseppe Motta 31-33, Geneva, CH1202, Switzerland |
| DEMBLOWSKI, Denis Anthony RESIGNED | Secretary | 14 Sep 2001 | 21 Oct 2002 | | | 15 Chemin De La Rochette, Geneva, 1202, FOREIGN, Switzerland |
| DOWDALL, Kay Louise RESIGNED | Secretary | 01 Mar 2014 | 27 Jun 2016 | | | Princess House, Princess Way, Swansea, SA1 3LW, United Kingdom |
| RICHARDS, William Garfield RESIGNED | Secretary | | 14 Sep 2001 | | | 5 Pinetree Close, Burry Port, Carmarthenshire, SA16 0TF |
| PINSENT MASONS SECRETARIAL LIMITED RESIGNED | Secretary | 17 Jul 2001 | 25 Jun 2014 | | | 1 Park Row, Leeds, West Yorkshire, LS1 5AB |
| AYLESBURY, Alan Charles RESIGNED | Director | | 01 Jul 1995 | | February 1936 | 28 Rhyd Yr Helig The Bryn, Sketty, Swansea, West Glamorgan, SA2 8DH |
| BEMELMANS, Hubertus Antonius Johannes RESIGNED | Director | | 12 Jun 1995 | | January 1944 | Eendekooi 26, Drunen, FOREIGN, Netherlands |
| BOTHAM, Vincent Colin RESIGNED | Director | 10 Jan 2000 | 14 Sep 2001 | | November 1948 | 64 Stanwell Road, Penarth, Vale Of Glamorgan, CF64 3LQ |
| CAMINO, Jose Ramon RESIGNED | Director | 13 Apr 2007 | 01 Mar 2014 | Switzerland | March 1961 | Alcoa Europe, Ave Giuseppe Motta 31-33, Geneva, CH1202, Switzerland |
| DOWDALL, Kay Louise, Dr RESIGNED | Director | 01 Mar 2014 | 28 Jun 2019 | United Kingdom | October 1969 | Princess House, Princess Way, Swansea, SA1 3LW, United Kingdom |
| EVANS, Nigel Robert RESIGNED | Director | 01 Sep 1995 | 07 Feb 2000 | United Kingdom | August 1960 | Arwelfa 1 Golwg Y Myndd, Craig Cefn Parc, Swansea, West Glamorgan, SA6 5RF |
| FARGAS MAS, Lluis Maria RESIGNED | Director | 14 Sep 2001 | 31 Aug 2020 | Switzerland | January 1966 | Alcoa Europe, Ave Giuseppe Motta 31-33, Geneva, CH1202, Switzerland |
| FAULL, Ian Trevor RESIGNED | Director | 14 Sep 2001 | 31 Dec 2008 | United Kingdom | September 1950 | West Chalet Groves Avenue, Langland, Swansea, West Glamorgan, SA3 4QF |
| FURTADO, Marcelo Augusto De Mendonca RESIGNED | Director | 10 Jan 2000 | 14 Sep 2001 | Switzerland | May 1954 | 6 Chemin De La Huate Belotte, Cologny/Vesenaz, Geneva 1222, FOREIGN, Switzerland |
| GLARO, Galdino RESIGNED | Director | 10 Jan 2000 | 04 Mar 2003 | | May 1959 | Chides Bouvrevils No. 20, 1234-Vessy, Geneva, FOREIGN, Switzerland |
| HANCOCK, James Frank RESIGNED | Director | 01 Jul 2019 | 16 Dec 2022 | England | January 1978 | C/O Tmf Group, 8th Floor, 20 Farringdon Street, London, EC4A 4AB, United Kingdom |
| KING, David Arthur RESIGNED | Director | 01 Feb 1994 | 01 Sep 1995 | | December 1947 | 35 The Paddock, West Cross, Swansea, West Glamorgan |
| LUCOT, Joseph R RESIGNED | Director | 04 Mar 2003 | 20 Mar 2006 | | January 1964 | 21 Chemin De Lulasse, Vandoeuvres, 1253, Switzerland |
| MACLEAN, Hugh John RESIGNED | Director | 14 Sep 2001 | 04 Mar 2003 | | April 1955 | Chemin Des Osches 41, Pully, 1009, Switzerland |
| OOTEMAN, Johannes Meindert Willem RESIGNED | Director | | 10 Jan 2000 | | December 1940 | Dorpsdijk 26, Nl-4156 Al Rumpt, Netherlands, FOREIGN |
| PARKER, Thomas David RESIGNED | Director | | 01 May 1993 | | August 1946 | 76 Tycoch Road, Sketty, Swansea, West Glamorgan, SA2 9EQ |
| SMITH, George Ronald RESIGNED | Director | 01 Feb 2008 | 09 Jun 2009 | United Kingdom | February 1946 | 4 Kings Walk, Kings Bromley, Lichfield, Staffordshire, DE13 7JU |
| STAM, Willem RESIGNED | Director | 16 Apr 1992 | 12 Jun 1995 | | March 1943 | Mesdagplein 19, Drunen, FOREIGN, Netherlands |
| VAN OVERVELD, Antonius Cornelis Petrus Ludovicus RESIGNED | Director | 12 Jun 1995 | 10 Jan 2000 | | June 1946 | Donauring 190, Tj Drunen 5152, The Netherlands, FOREIGN |
| WELCH-BALLENTINE, Caroline Delia RESIGNED | Director | 09 Jun 2009 | 15 Jul 2010 | France | December 1965 | 121c, Route De Foncenex, Veigy-Foncenex, 74140, France |
| WOODS, Stephen Matthew RESIGNED | Director | 16 Dec 2022 | 12 Mar 2026 | England | July 1972 | C/O Tmf Group,, 13th Floor, One Angel Court, London, EC2R 7HJ, United Kingdom |