| Dalton's Atvs Limited | Wholesale & retail | 2002 |
| Daniel Doughty Ltd. | Construction | 2023 |
| Dark-Metaverse Ltd | Wholesale & retail | 2021 |
| Datblygiadau B & C CYF | Construction | 2017 |
| Davies of Lampeter Ltd | Transport & logistics | 2012 |
| Deanmore Limited | Construction | 2021 |
| Deckrite Limited | Manufacturing | 2010 |
| Declan Moroney Community Homes Ltd | Construction | 2021 |
| Declan Moroney Construction Ltd | Construction | 2007 |
| Douglas Brothers Limited | Administrative & support | 1997 |
| Dyfed Dirt Bike Club Limited | Arts & recreation | 2005 |
| E Jones Plumbing Ltd. | Construction | 2020 |
| E Lythgoe Holdings Limited | Professional & scientific | 2025 |
| E Lythgoe Properties Limited | Real estate | 2025 |
| E&M Motor Factors Limited | Wholesale & retail | 2008 |
| E.J. Metals Recycling Ltd | Water & waste | 2013 |
| Eiddo OJ Ltd | Real estate | 2024 |
| Electech Electrics Limited | Construction | 2023 |
| Elsfa Limited | Professional & scientific | 2017 |
| Endurokid UK Ltd | Arts & recreation | 2022 |
| Eryl Jones Insurance Consultants Ltd | Financial services | 2010 |
| Escari Estates Ltd | Real estate | 2025 |
| Eurosped Limited | Transport & logistics | 2013 |
| Event Eateries Ltd. | Hospitality | 2013 |
| F Mcdermott Limited | Hospitality | 2020 |
| F-Zed Ltd | Health & social care | 2021 |
| Factory Yard Cwmann Limited | Administrative & support | 1999 |
| Fairlight Global Limited | Professional & scientific | 2017 |
| Fairlight Property Limited | Real estate | 2019 |
| Fastline Cabs Limited | Transport & logistics | 2019 |
| Felicity Vacation International Limited | Hospitality | 2024 |
| Felindre Cockapoos Ltd | Agriculture & fishing | 2017 |
| Felindre Hospitality Ltd | Hospitality | 2022 |
| Ffoshelyg Caravan Park Limited | Wholesale & retail | 2002 |
| Ffynnon Properties Ltd | Real estate | 1988 |
| Finn Charles Limited | Information & communication | 2000 |
| Flitestar Aviation Ltd | Transport & logistics | 2019 |
| Flour & ASH Ltd | Hospitality | 2017 |
| Flowroll Ltd | Wholesale & retail | 2024 |
| Fluxstate Ltd | Health & social care | 2023 |
| Ford Locum Services Ltd | Health & social care | 2015 |
| Fronfraith Ltd | Professional & scientific | 2013 |
| G & N Doyle Limited | Hospitality | 2025 |
| Garth Newydd Community Interest Company | Administrative & support | 2026 |
| Gelli Gaer Limited | Professional & scientific | 2024 |
| Generalship Ltd | Information & communication | 2013 |
| GG Designs Print & Embroidery Ltd | Professional & scientific | 2021 |
| Ghost Engineering Ltd | Manufacturing | 2016 |
| Glowstay Ltd | Hospitality | 2025 |
| Go Eco Glamping Ltd | Hospitality | 2024 |
| Goetre Villa Ltd | Other services | 2016 |
| Googlies Ltd | Manufacturing | 2022 |
| Granny's Kitchen Limited | Hospitality | 2017 |
| Gweithgor Dyffryn Aeron CYF | Administrative & support | 2007 |
| Gwyncon Ltd | Information & communication | 2019 |
| Gwyndaf Davies Ltd | Construction | 2004 |
| Hagesstreetfood Ltd | Hospitality | 2024 |
| Home-Start Ceredigion | Health & social care | 2005 |
| Hush Farms Ltd | Education | 2011 |
| Hydro Bull Ltd | Wholesale & retail | 2019 |
| Idawal | Other services | 2020 |
| Imladris Smallholding Ltd | Agriculture & fishing | 2025 |
| Iwan R Evans Limited | Agriculture & fishing | 2011 |
| J & E Woodworks Ltd | Construction | 2016 |
| J&P Windows Ltd | Manufacturing | 2005 |
| Jadeflow Limited | Hospitality | 2024 |
| JD AD Limited | Energy | 2015 |
| JD Targets Ltd | Extraterritorial | 2023 |
| Jengyd CYF | Arts & recreation | 2022 |
| Jenton Limited | Administrative & support | 1999 |
| JKL Servicies Ltd | Manufacturing | 2025 |
| JO Waddington Law Limited | Professional & scientific | 2017 |
| John Tomes Engineering Limited | Wholesale & retail | 1998 |
| Jones the Bread Ltd | Manufacturing | 2018 |
| JRL Forestry Contractor Ltd | Agriculture & fishing | 2025 |
| Kazmar Rural Limited | Hospitality | 2022 |
| Kevin Evans Cleaning Services & Supplies Ltd. | Administrative & support | 2008 |
| KML Removals Ltd | Transport & logistics | 2024 |
| KN 21 Limited | Other services | 2023 |
| Kronva Consulting Ltd | Extraterritorial | 2025 |
| Kronva Limited | Information & communication | 2015 |
| L a S Property Wales Limited | Real estate | 2007 |
| Ladybug (Carmarthen) CYF | Wholesale & retail | 2020 |
| Lampeter Eats Ltd | Hospitality | 2025 |
| Lampeter Events C.I.C. | Arts & recreation | 2007 |
| Lampeter Foods Station Ltd | Hospitality | 2023 |
| Lampeter Harness Racing Club Limited | Arts & recreation | 2009 |
| Lampeter Laundrette Ltd | Manufacturing | 2024 |
| Lampeter Tree Services Limited | Agriculture & fishing | 2001 |
| LB Training Academy Limited | Wholesale & retail | 2018 |
| Llaethdy Nantygelli Ltd | Agriculture & fishing | 2025 |
| Llambed Development Trust | Administrative & support | 2009 |
| Lloyd's Dairy Centre Limited | Wholesale & retail | 2005 |
| Llwyn Farm Ltd | Agriculture & fishing | 2018 |
| Longview Properties Ltd | Agriculture & fishing | 2000 |
| Lord Capital Ltd | Professional & scientific | 2025 |
| Luke Berriman Consultancy Limited | Administrative & support | 2018 |
| LV Grocer Ltd | Wholesale & retail | 2025 |
| Lyft (Love Your Fitness Training) Club Ltd | Administrative & support | 2024 |
| M & E Blinds & Shutters Limited | Manufacturing | 2025 |