| A & LM Ltd | Agriculture & fishing | 2021 |
| A.G. Morgan Computer Services Limited | Information & communication | 1999 |
| A.P.Commercials Ltd | Wholesale & retail | 2006 |
| Adrian W.Morris Limited | Financial services | 2014 |
| ADS Alphadoc Solutions Limited | Administrative & support | 2003 |
| Agenda Films Limited | Information & communication | 1992 |
| Akamuti Limited | Wholesale & retail | 2005 |
| Albert Rees Ltd | Manufacturing | 2003 |
| Amgoed Pets Limited | Agriculture & fishing | 2003 |
| Antur Grenig Limited | Hospitality | 2006 |
| Arolwg CYF | Professional & scientific | 2002 |
| Arry's Plant Hire Limited | Construction | 2005 |
| Aspro (Homes) Ltd | Real estate | 2019 |
| Balm Dinefwr Limited | Health & social care | 2007 |
| Berridge Jones Ltd | Arts & recreation | 2005 |
| Betws Common Holdings Limited | Real estate | 1984 |
| Blue Hawk Properties Ltd | Real estate | 2022 |
| Brecon Carreg Ltd | Manufacturing | 2019 |
| Bysiau CWM TAF Valley Coaches Limited | Transport & logistics | 2001 |
| Caeffair Limited | Hospitality | 1994 |
| Canolfan Gymunedol Ystradowen Community Centre Ltd | Other services | 2011 |
| Carmarthen Decorating Centre Limited | Wholesale & retail | 2003 |
| Carmarthen Electronics Limited | Wholesale & retail | 2007 |
| Carmarthenshire Falconry Limited | Agriculture & fishing | 2018 |
| Cartrefi Ceiliog Limited | Construction | 2004 |
| Castell Howell Food Group Limited | Wholesale & retail | 2002 |
| Castle Garage Limited(The) | Wholesale & retail | 1925 |
| Castle Hospitality and Event Services Ltd | Hospitality | 2026 |
| Cemeg Limited | Professional & scientific | 1998 |
| Centaframe Pvcu Systems Ltd | Manufacturing | 2004 |
| Clwb Gofal MES Y Dderwen | Health & social care | 1998 |
| Construction Industry Trade Alliance (Wales) Limited | Professional & scientific | 1995 |
| Continental Self Storage Ltd | Transport & logistics | 2020 |
| Costa Mooney Trading Company Ltd | Financial services | 2024 |
| Country Hotels (Wales) Ltd. | Real estate | 1998 |
| Crown House Publishing Limited | Information & communication | 1998 |
| Cwmni Griffiths Bwtri Mawr Y Betws CYF | Construction | 1999 |
| D O Hughes & SON Limited | Wholesale & retail | 2007 |
| D.C.T. Property Holdings Limited | Real estate | 2003 |
| Dairies Sports & Social Club Limited(The) | Hospitality | 1986 |
| Dale Vaughan Limited | Construction | 2007 |
| DAN Thomas Services (DTS) Ltd | Construction | 2021 |
| DAR Design Limited | Manufacturing | 2005 |
| Darren Smith Plumbing and Heating Engineer Limited | Construction | 2008 |
| Data Management Associates Limited | Information & communication | 1992 |
| Ddol Fach Dairies Ltd | Wholesale & retail | 2014 |
| Derwen Garage Limited | Wholesale & retail | 2007 |
| Desert Falcons Limited | Agriculture & fishing | 2007 |
| DL & Red Davies Limited | Construction | 2006 |
| Doel & Rowlands Limited | Construction | 2005 |
| Dolwen Fawr Farms Ltd | Agriculture & fishing | 2015 |
| Dragon Residential Lettings & Property Management Limited | Real estate | 2005 |
| E.R.Cole Trading Ltd | Wholesale & retail | 2024 |
| E.T.Gration Limited | Information & communication | 2004 |
| Eco Solutions UK Limited | Professional & scientific | 1999 |
| Electric Access Solutions Ltd | Construction | 2023 |
| Elidyr Communities Trust Ltd | Health & social care | 1975 |
| Eliezer Ltd | Hospitality | 2006 |
| Emerald Vets Limited | Professional & scientific | 2006 |
| ERM Technologies Limited | Professional & scientific | 2002 |
| Evolution Health & Fitness Centre Limited | Arts & recreation | 2002 |
| Fairways Trading Limited | Wholesale & retail | 2006 |
| Felinfoel Brewery Company Limited(The) | Manufacturing | 1906 |
| Ffgf Ltd | Agriculture & fishing | 2017 |
| Floodgate Ltd | Manufacturing | 2001 |
| G M R Contractors Limited | Construction | 1987 |
| George & Price Limited | Construction | 2004 |
| GG Bedding and Equine Supplies Ltd | Wholesale & retail | 2023 |
| Glangwili Mansion Ltd | Hospitality | 2003 |
| Glasallt Fawr - Camphill Centre | Health & social care | 2006 |
| Gomer Williams & Co Limited | Professional & scientific | 2006 |
| Gwenmair Investments Limited | Financial services | 2021 |
| Gwyn Lewis Carpets Limited | Construction | 2003 |
| H.B.Thomas and SON (Carmarthen) Limited | Real estate | 1962 |
| Hafod Water Limited | Manufacturing | 2003 |
| Hapika Ltd | Agriculture & fishing | 2023 |
| Healthcare (Wales) Ltd. | Wholesale & retail | 2002 |
| Howards of Llanelli Limited | Extraterritorial | 1985 |
| Hugh Williams Limited | Professional & scientific | 2005 |
| HY Impact Breaking Ltd | Administrative & support | 2006 |
| IMD Systems Limited | Professional & scientific | 2004 |
| INSIGHT2WALES Limited | Administrative & support | 2007 |
| Intelligent Resource Management Limited | Professional & scientific | 2009 |
| IRP Wealth Planning LLP | | 2004 |
| J P H Haulage Limited | Information & communication | 2000 |
| J.W. Stone and Brick Limited | Wholesale & retail | 2004 |
| JAS Law Limited | Professional & scientific | 2022 |
| John Long (West Wales) Limited | Real estate | 1966 |
| Jones Bros. Ltd | Real estate | 2004 |
| Jrbc Ltd | Administrative & support | 2009 |
| K&S Property Development & Management Ltd | Construction | 2023 |
| KEN. Ratcliffe & SON Limited | Wholesale & retail | 1940 |
| Kingdon Properties Ltd | Construction | 2007 |
| L&P Social Ltd | Professional & scientific | 2025 |
| Landsker Archaeology Limited | Professional & scientific | 2002 |
| Lariche Investments Limited | Real estate | 1988 |
| Lewis Partnership Limited | Professional & scientific | 2000 |
| Libra Energy & Estates Limited | Other services | 2007 |
| Llamasoft Limited | Information & communication | 2004 |
| Llandeilo R.F.C. Limited | Arts & recreation | 2003 |