| PAPINNIEMI-AINGER, Petra ACTIVE | Secretary | 01 Nov 2016 | | | | Howmet, Kestrel Way, Sowton Industrial Estate, Exeter, EX2 7LG, England |
| BUGARCIC, Monalito ACTIVE | Director | 31 Aug 2020 | | Switzerland | June 1975 | Howmet, Kestrel Way, Sowton Industrial Estate, Exeter, EX2 7LG, England |
| TALBOT, Patrick Michael ACTIVE | Director | 19 May 2015 | | United Kingdom | February 1975 | Howmet, Kestrel Way, Sowton Industrial Estate, Exeter, EX2 7LG, England |
| TOUSSAINT, Cedric ACTIVE | Director | 17 Mar 2025 | | United States | January 1975 | Howmet, Kestrel Way, Sowton Industrial Estate, Exeter, EX2 7LG, England |
| WREFORD, Andrew James ACTIVE | Director | 11 Mar 2024 | | England | September 1974 | Howmet, Kestrel Way, Sowton Industrial Estate, Exeter, EX2 7LG, England |
| CAMINO, Jose Ramon RESIGNED | Secretary | 21 Oct 2002 | 01 Mar 2014 | | | Alcoa Europe, Ave Giuseppe Motta 31-33, Geneva, Ch1202, Switzerland |
| COTTON, Clive Everett RESIGNED | Secretary | 05 Jul 1996 | 19 Dec 2000 | | | Barns Close, Cadeleigh, Tiverton, Devon, EX16 8RZ |
| DAVIES, Wyn Meredith RESIGNED | Secretary | 21 Nov 1991 | 28 Jun 1996 | | | 25a White Street, Topsham, Exeter, Devon, EX3 0AE |
| DEMBLOWSKI, Denis Anthony RESIGNED | Secretary | 19 Dec 2000 | 21 Oct 2002 | | | 15 Chemin De La Rochette, Geneva, 1202, FOREIGN, Switzerland |
| WOODS, Stephen Matthew RESIGNED | Secretary | 25 Jun 2014 | 01 Nov 2016 | | | Kestrel Way, Exeter, Devon, EX2 7LG, United Kingdom |
| PINSENT MASONS SECRETARIAL LIMITED RESIGNED | Secretary | 12 Nov 2001 | 25 Jun 2014 | | | 1 Park Row, Leeds, West Yorkshire, LS1 5AB |
| SWIFT INCORPORATIONS LIMITED RESIGNED | Nominee Secretary | 04 Nov 1991 | 21 Nov 1991 | | | 26, Church Street, London, NW8 8EP |
| BAUER, Dirk RESIGNED | Director | 20 May 2015 | 25 Apr 2018 | France | June 1971 | Howmet Limited, Kestrel Way, Exeter, Devon, EX2 7LG, United Kingdom |
| CAMINO, Jose Ramon RESIGNED | Director | 15 Jul 2010 | 01 Mar 2014 | Switzerland | March 1961 | Alcoa Europe, Ave Giuseppe Motta 31-33, Geneva, Ch1202, Switzerland |
| DEMBLOWSKI, Denis Anthony RESIGNED | Director | 19 Dec 2000 | 21 Oct 2002 | | August 1950 | 15 Chemin De La Rochette, Geneva, 1202, FOREIGN, Switzerland |
| ELVER, Brian Harold RESIGNED | Director | 21 Nov 1991 | 02 Feb 1996 | | March 1940 | 15 Higher Holcombe Drive, Teignmouth, Devon, TQ14 8RF |
| FARGAS MAS, Lluis Maria RESIGNED | Director | 19 Dec 2000 | 31 Aug 2020 | Switzerland | January 1966 | Alcoa Europe, Ave Giuseppe Motta 31-33, Geneva, CH1202, Switzerland |
| FAULL, Ian Trevor RESIGNED | Director | 19 Dec 2000 | 31 Dec 2008 | United Kingdom | September 1950 | West Chalet Groves Avenue, Langland, Swansea, West Glamorgan, SA3 4QF |
| HAMBLETON, Roger Colin RESIGNED | Director | 21 Nov 1991 | 08 May 2001 | | May 1944 | 6-2-4 Izumino Machi, Kanazawa 921, Ishikawa Prefecture, Japan |
| HANRAHAN, Michael Robert RESIGNED | Director | 17 Oct 2000 | 13 Oct 2001 | | October 1956 | Rineanna, Lower Corndon Farm, Chagford, Newton Abbot, Devon, TQ13 8EE |
| LASKER, Mark RESIGNED | Director | 29 Nov 1994 | 20 Apr 2000 | | July 1937 | 8 Avenue Des Ternes, Paris, FOREIGN, France |
| LUCOT, Joseph R RESIGNED | Director | 21 Oct 2002 | 20 Mar 2006 | | January 1964 | 21 Chemin De Lulasse, Vandoeuvres, 1253, Switzerland |
| MCCARTHY, Martin Gerard RESIGNED | Director | 10 Jul 2012 | 27 May 2015 | United Kingdom | July 1962 | Alcoa Howmet, Kestrel Way, Sowton, Exeter, Devon, EX2 7LG |
| MITCHELL, Raymond Barns RESIGNED | Director | 19 Dec 2000 | 21 Oct 2002 | | May 1958 | Avenue De Florimont, 20 Bis, Lausanne, 1006, Switzerland |
| MUELLER, Boyd RESIGNED | Director | 19 Apr 2018 | 01 Apr 2025 | United States | March 1959 | Howmet, Kestrel Way, Sowton Industrial Estate, Exeter, EX2 7LG, England |
| PEPPER, Michael Allen RESIGNED | Director | 04 Dec 1998 | 04 Jul 2000 | | August 1961 | Parkview, Silverton, Exeter, EX5 4DE |
| ROSE, Terence Dennis RESIGNED | Director | 23 Aug 1993 | 13 Oct 2001 | | March 1945 | 8 Avenue Des Ternes, Paris, 75017, FOREIGN, France |
| SANDERS, Scott Douglas RESIGNED | Director | 02 Jul 1996 | 04 Dec 1998 | | May 1957 | Heath Barton Harrington Lane, Pinhoe, Exeter, Devon, EX4 8QW |
| SMITH, George Ronald RESIGNED | Director | 01 Feb 2008 | 09 Jun 2009 | United Kingdom | February 1946 | 4 Kings Walk, Kings Bromley, Lichfield, Staffordshire, DE13 7JU |
| WARD, Ronald Leonard RESIGNED | Director | 21 Nov 1991 | 05 Apr 1995 | | May 1933 | 29 The Rosemullion, Budleigh Salterton, Devon, EX9 6LA |
| 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 | 18 Apr 2018 | 12 Mar 2026 | England | July 1972 | Howmet, Kestrel Way, Sowton Industrial Estate, Exeter, EX2 7LG, England |
| INSTANT COMPANIES LIMITED RESIGNED | Nominee Director | 04 Nov 1991 | 21 Nov 1991 | | | 1, Mitchell Lane, Bristol, Avon, BS1 6BU |