| 18-19 Heol Y CWM Limited | Extraterritorial | 2019 |
| 20-21 Heol Y CWM Limited | Extraterritorial | 2019 |
| 3MTLETTINGS Ltd | Real estate | 2025 |
| A & SI Contractors Ltd | Administrative & support | 2022 |
| A M Esau Limited | Other services | 2005 |
| A Sober Spot Ltd | Hospitality | 2026 |
| A4W Innovation C.I.C. | Education | 2013 |
| ACH Engineering and Environmental Services Limited | Professional & scientific | 2012 |
| Adam Cole Estates Limited | Hospitality | 2021 |
| Adventure Beyond Limited | Arts & recreation | 2001 |
| Adventure Beyond Schools Limited | Arts & recreation | 2009 |
| Air View Engineering Ltd | Professional & scientific | 2021 |
| Aird Holdings Limited | Financial services | 2021 |
| AJ James & Sons Limited | Agriculture & fishing | 2008 |
| Alan Cope Services Ltd | Professional & scientific | 2015 |
| Alltyrodyn Farm Ltd | Real estate | 2025 |
| Alpas Events Ltd | Hospitality | 2019 |
| Ana's Farmacy Ltd | Manufacturing | 2020 |
| ANC Group Holdings Ltd | Professional & scientific | 2026 |
| Andgreen (Red Kite) Limited | Real estate | 2005 |
| Androidgynous Ltd | Professional & scientific | 2018 |
| Andton Investments Limited | Real estate | 2005 |
| ANIM8DESIGN Ltd | Manufacturing | 2006 |
| Arfordir Holdings Ltd | Financial services | 2015 |
| Arfordir Properties LLP | | 2015 |
| Aromist Ltd | Manufacturing | 2026 |
| Arwerthwyr LJ CYF | Financial services | 2026 |
| Arwyn Vobe Accountancy Ltd. | Professional & scientific | 2015 |
| Atlantic Challenge GB Maritime Training Trust Ltd | Education | 1993 |
| Atlas Windows (Llandysul) Ltd | Construction | 2008 |
| Aves Group Holdings Limited | Financial services | 2025 |
| B & S Educational Systems & Training Ltd | Professional & scientific | 2013 |
| Back Pocket HR Ltd | Professional & scientific | 2025 |
| Baum Tree Company Limited | Agriculture & fishing | 2020 |
| BB4W Ltd | Information & communication | 2019 |
| BDE Systems Ltd | Manufacturing | 2026 |
| Bikers Campsite Limited | Hospitality | 2023 |
| Biorhythmica Ltd | Wholesale & retail | 2024 |
| Blaen Maenog Limited | Agriculture & fishing | 2023 |
| Blove Sacred Sound Ltd | Manufacturing | 2025 |
| Broken Sleep Books Limited | Information & communication | 2020 |
| BRS Revenue Protection Ltd | Transport & logistics | 2013 |
| Brunel Infrastructure Services Ltd | Construction | 2022 |
| Brynhoffnant Business Limited | Other services | 2018 |
| Brynhoffnant Limited | Hospitality | 2006 |
| BTL Portfolio Finance Ltd | Financial services | 2026 |
| Bushcraft Media Limited | Information & communication | 2006 |
| Bwthyn Industries Ltd | Information & communication | 2006 |
| C N C Cymru Services Limited | Real estate | 2025 |
| C.O. Edwards Flooring Limited | Construction | 2008 |
| Caban Bwyd Ltd | Hospitality | 2026 |
| Caffi Sgadan CYF | Hospitality | 2022 |
| Canolfan Crannog | Arts & recreation | 2012 |
| Carboncreditnow.Com Ltd | Other services | 2021 |
| Cardigan Bay Active Ltd | Arts & recreation | 2011 |
| Cardigan Bay Leisure Ltd | Arts & recreation | 2017 |
| Cardiopharm Solutions Limited | Professional & scientific | 2012 |
| Carmarthen Town Ltd | Hospitality | 2023 |
| Carmarthenshiremetalrecycling Limited | Water & waste | 2012 |
| Carsalespoint.Co.Uk Limited | Wholesale & retail | 2014 |
| Cartref Care Home Ltd | Health & social care | 2003 |
| Cartrefi Einon Homes Limited | Construction | 2008 |
| Castell Howell Escapes Ltd | Hospitality | 2025 |
| Castell Ystrad Developments Limited | Construction | 2008 |
| Cattallon Creative Productions Ltd | Information & communication | 2019 |
| Caws Teifi Ltd | Wholesale & retail | 2025 |
| Celtic Country Wines Limited | Manufacturing | 2020 |
| Celyn Investments CYF | Real estate | 2022 |
| Ceridwen Centre Limited | Administrative & support | 2004 |
| Cherry Picked Farm Shop Ltd | Wholesale & retail | 2023 |
| Chinese Llanbedrog CYF | Hospitality | 2026 |
| Chrysanthemum Designs Limited | Administrative & support | 2004 |
| Chuckling Goat Holdings Limited | Financial services | 2022 |
| Chuckling Goat Limited | Manufacturing | 2014 |
| Club Mambo Ltd | Hospitality | 2020 |
| Clyd Lettings Ltd | Real estate | 2024 |
| Coed Bedw Ltd | Real estate | 2013 |
| Coed PEN YR Allt Ltd | Education | 2010 |
| Corgam Farming Enterprises Limited | Agriculture & fishing | 2023 |
| Cornerstone Mortgages Limited | Financial services | 2013 |
| Cribor Fach CYF. | Agriculture & fishing | 2022 |
| Crouch Property Holdings Ltd | Real estate | 2025 |
| CSW Holidays Ltd | Hospitality | 2017 |
| Curo Services Ltd | Administrative & support | 2026 |
| Custom Kids Curtains Ltd | Manufacturing | 2020 |
| CWC ( West Wales ) Limited | Administrative & support | 2023 |
| CWM Golff Ltd | Hospitality | 2024 |
| Cwmbychan Limited | Professional & scientific | 2019 |
| Cwmni Bondo PAC | | 2019 |
| Cwrws Cottages Ltd | Real estate | 2021 |
| Cyd-Siarad CYF | Education | 2023 |
| Cyfrifwyr Lloyds Accountants Ltd | Professional & scientific | 2020 |
| Cymdeithas Chwaraeon Llandysul | Arts & recreation | 1988 |
| Cymru Community Collaboration CIC | Education | 2025 |
| Cynllunio RW Planning Limited | Professional & scientific | 2022 |
| Cynyrchiadau HAY Productions Limited | Information & communication | 2011 |
| D & J Davies Limited | Wholesale & retail | 2005 |
| D. Taylor Builders Limited | Construction | 2005 |
| D10AED Ltd | Real estate | 2020 |
| Dad's Farm Ltd | Manufacturing | 2020 |