| MORRIS, Elin Gwenllian ACTIVE | Secretary | 30 Jul 2008 | | | | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| DAVIES, William Dyfrig ACTIVE | Director | 19 May 2025 | | Wales | November 1963 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| DIMMICK, Stephen ACTIVE | Director | 16 Sep 2026 | | Wales | July 1975 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| EVANS, Geraint Rhys ACTIVE | Director | 01 Jan 2025 | | Wales | March 1968 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| JOHNSTON, Richard Robert ACTIVE | Director | 30 Jan 2025 | | United Kingdom | May 1967 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| LANG, Oliver James Alport ACTIVE | Director | 30 Jan 2025 | | England | April 1971 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| MORRIS, Elin Gwenllian ACTIVE | Director | 13 May 2009 | | Wales | October 1965 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| RAMASUT, Vilidda Catryn Jennet ACTIVE | Director | 19 May 2025 | | Wales | October 1975 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| SANAN, Luci Rebecca ACTIVE | Director | 30 Jan 2025 | | England | May 1983 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| WINOGORSKI, Sharon Ann ACTIVE | Director | 28 Nov 2019 | | Wales | April 1970 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| EVANS, Philip Gwynne RESIGNED | Secretary | 30 Jun 1998 | 27 Sep 1999 | | | 103 Rhydypenau Road, Cyncoed, Cardiff, South Glamorgan, CF2 6PZ |
| HOPKINS, Nerys Sian RESIGNED | Secretary | 21 Sep 1999 | 05 Jul 2006 | | | 6 Dagnan Road, Clapham, London, SW12 9LQ |
| HUGHES, Paul RESIGNED | Secretary | 05 Jul 2006 | 18 Jul 2008 | | | 53 Cwrt Sart, Neath, West Glamorgan, SA11 2SR |
| CRESCENT HILL LIMITED RESIGNED | Nominee Secretary | 08 Apr 1998 | 30 Jun 1998 | | | Dumfries House, Dumfries Place, Cardiff, South Glamorgan, CF10 3FN |
| BELL, Carol, Dr RESIGNED | Director | 16 Oct 2012 | 30 Jun 2018 | United Kingdom | October 1958 | Parc Ty Glas, Llanishen, Cardiff, CF14 5DU |
| BRACE, Catrin RESIGNED | Director | 30 Jun 1998 | 30 Jun 2001 | | March 1952 | 7 Fairleigh Road, Pontcanna, Cardiff, CF1 9JT |
| BRYANT, David Thomas RESIGNED | Director | 09 Jul 2014 | 09 Jul 2019 | England | April 1959 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| DARWIN, Rhianydd Jane RESIGNED | Director | 30 Jun 1998 | 31 Jan 2006 | | March 1969 | 23 Kings Road, Cardiff, South Glamorgan, CF11 9BZ |
| DAVIES, John Thomas RESIGNED | Director | 14 Feb 2011 | 15 Oct 2014 | Wales | August 1963 | Parc Ty Glas, Llanishen, Cardiff, CF14 5DU |
| DERBYSHIRE, Owen Glyn RESIGNED | Director | 07 Nov 2018 | 01 Feb 2021 | Wales | November 1990 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| DOYLE, Sian Elin RESIGNED | Director | 09 Feb 2022 | 24 Nov 2023 | Wales | June 1967 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| EVANS, Gwyn Owen RESIGNED | Director | 11 Oct 2017 | 31 Dec 2021 | Wales | November 1968 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| EVANS, Hugh Hesketh RESIGNED | Director | 11 Dec 2014 | 07 Nov 2018 | Wales | August 1961 | Parc Ty Glas, Llanishen, Cardiff, CF14 5DU |
| EVANS, Philip Gwynne RESIGNED | Director | 30 Jun 1998 | 21 Feb 2005 | Wales | May 1960 | 16 Dan Yr Heol, Cyncoed, Cardiff, CF23 6JU |
| GEORGE, Anita Anne RESIGNED | Director | 07 Nov 2018 | 01 Jul 2022 | United Kingdom | March 1959 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| GRITTEN, Adele Catherine RESIGNED | Director | 12 May 2021 | 30 Apr 2025 | United Kingdom | September 1976 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| HOPKINS, Nerys Sian RESIGNED | Director | 05 Jul 2006 | 01 Oct 2010 | United Kingdom | February 1972 | Parc Ty Glas, Llanishen, Cardiff, CF14 5DU |
| INNES, William David Wyn RESIGNED | Director | 30 Jun 1998 | 21 Feb 2005 | Wales | December 1963 | Greenfield Llantwit Road, Creigiau, Cardiff, CF15 9NN |
| JONES, Christopher Alun RESIGNED | Director | 01 Apr 2021 | 30 Apr 2025 | Wales | January 1964 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| JONES, Clive William RESIGNED | Director | 26 Sep 2007 | 31 Dec 2012 | England | January 1949 | Parc Ty Glas, Llanishen, Cardiff, CF14 5DU |
| JONES, David Huw RESIGNED | Director | 21 Feb 2005 | 03 Oct 2005 | Wales | May 1948 | 8 Heol Don, Cardiff, South Glamorgan, CF14 2AU |
| JONES, Dyfrig Wynn RESIGNED | Director | 13 Dec 2011 | 22 Apr 2013 | United Kingdom | January 1977 | Parc Ty Glas, Llanishen, Cardiff, CF14 5DU |
| JONES, Ian Howell RESIGNED | Director | 14 Feb 2012 | 30 Sep 2017 | Wales | January 1958 | Parc Ty Glas, Llanishen, Cardiff, CF14 5DU |
| JONES, Iona Elisabeth Lois RESIGNED | Director | 30 Jun 2005 | 04 Aug 2010 | Wales | January 1964 | Parc Ty Glas, Llanishen, Cardiff, CF14 5DU |
| JONES, Roger Spencer, Sir RESIGNED | Director | 14 Feb 2011 | 23 Nov 2011 | United Kingdom | July 1943 | Parc Ty Glas, Llanishen, Cardiff, CF14 5DU |
| MOREMON, Richard Thomas RESIGNED | Director | 21 Dec 1999 | 12 Sep 2003 | | June 1964 | 9 Upper Cosmeston Farm, Penarth, South Glamorgan, CF64 5UB |
| MORRIS, Kathryn Beryl RESIGNED | Director | 21 Feb 2005 | 09 Jul 2014 | Wales | June 1957 | Parc Ty Glas, Llanishen, Cardiff, CF14 5DU |
| ROBERTS, Gwyn Morris RESIGNED | Director | 17 Apr 2013 | 30 Apr 2025 | Company Director | January 1966 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| SANDERS, David John RESIGNED | Director | 19 May 2005 | 30 Jun 2022 | England | August 1949 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| WALTERS, David Huw RESIGNED | Director | 30 Jun 1998 | 22 Apr 2005 | Wales | July 1965 | Ashbrook, Llandow, Cowbridge, Vale Of Glamorgan, CF71 7NU |
| WILIAM, Sioned Mair RESIGNED | Director | 05 Apr 2024 | 01 Jan 2025 | England | June 1961 | Canolfan S4c Yr Egin, College Road, Carmarthen, SA31 3EQ, Wales |
| ST ANDREWS COMPANY SERVICES LIMITED RESIGNED | Nominee Director | 08 Apr 1998 | 30 Jun 1998 | | | Dumfries House, Dumfries Place, Cardiff, South Glamorgan, CF10 3FN |