| Davies & Rees Properties Ltd | Extraterritorial | 2025 |
| Davies Consultancy Group Ltd. | Construction | 2023 |
| Davies Morgan and Partners Limited | Real estate | 2020 |
| Deri Danto Limited | Information & communication | 2010 |
| DHL Gwynne Fencing Ltd | Construction | 2005 |
| Dilwyn Davies Properties Limited | Real estate | 2022 |
| Dinefwr Distillery Ltd | Manufacturing | 2024 |
| Dinefwr Orchardeers Ltd | Agriculture & fishing | 2024 |
| DK & J Roberts Limited | Construction | 2005 |
| Dodd Racher Limited | Information & communication | 2011 |
| Dog Dancing Ltd | Manufacturing | 2015 |
| Dolau Ltd | Agriculture & fishing | 2011 |
| Dotclothing Ltd | Wholesale & retail | 2019 |
| Dragon Internal Audit Services Limited | Professional & scientific | 2025 |
| Draig Properties Limited | Real estate | 2010 |
| Dual Zone Developments Ltd | Construction | 2017 |
| Dyfed Fencing Services Ltd | Agriculture & fishing | 2017 |
| E & T L Jones (Civils) Ltd | Construction | 2012 |
| Edwinsford Sporting Clays Ltd | Arts & recreation | 2025 |
| EIZ Global Ltd | Information & communication | 2024 |
| Elizabeth Preece Ltd | Professional & scientific | 2018 |
| Encrypted Clothing London Ltd | Wholesale & retail | 2018 |
| Ernst.B.Westman.Limited | Wholesale & retail | 1908 |
| Eves Toy Shop Ltd | Wholesale & retail | 2008 |
| Festival of Senses Community Interest Company | Administrative & support | 2026 |
| Fferm Esgair Owen Ltd | Agriculture & fishing | 2020 |
| Fielder-Hobbs Consultancy Services Ltd | Professional & scientific | 2024 |
| Financeme Ltd | Financial services | 2014 |
| Fine-Edge-Construction Ltd | Construction | 2011 |
| Friend and Friends Studio Ltd | Professional & scientific | 2018 |
| G. Pearson | Health & social care | 2008 |
| Gelli Secret Escapes Limited | Hospitality | 2022 |
| Genesis Life Ltd | Other services | 2018 |
| George Rowan Chimneys and Stoves Ltd | Construction | 2012 |
| GIN Haus Deli Limited | Hospitality | 2014 |
| Glamorgan-Gwent Archaeological Trust Limited (the) | Information & communication | 1976 |
| Glitter GIN Ltd | Wholesale & retail | 2022 |
| Glynawel Lettings Limited | Real estate | 2026 |
| Glynbyr Wildlife Rescue and Animal Sanctuary CIC | Agriculture & fishing | 2024 |
| GNH Contracts Ltd | Construction | 2020 |
| Gofal Golwg Ltd | Wholesale & retail | 2023 |
| Gofal Plant CYF | Health & social care | 2015 |
| Golwg Y Mynydd Golden Retrievers Limited | Agriculture & fishing | 2021 |
| Gourock Consulting Limited | Professional & scientific | 2026 |
| Green Ideas- Outdoor Education, Training and Coaching CYF | Education | 2019 |
| Green Tomato Limited | Health & social care | 2009 |
| Green Valley Group Ltd | Professional & scientific | 2017 |
| Greenview Kennels Ltd | Wholesale & retail | 2021 |
| Grove Software Testing Limited | Information & communication | 1993 |
| Gwynedd Archaeological Trust Limited | Professional & scientific | 1974 |
| Gwynt Gwndwn CYF | Extraterritorial | 2025 |
| Hanwell & Co.,Limited | Real estate | 1924 |
| Harries Motor Company Ltd | Wholesale & retail | 2026 |
| Harrington Grounds Ltd | Construction | 2019 |
| Hartington Court Management Limited | Households | 1993 |
| Haul Limited | Other services | 2026 |
| Hayes Heating and Homes Ltd | Construction | 2024 |
| Haywood Pubs Ltd | Hospitality | 2023 |
| Hemmings Plant Hire & Groundwork Contractors Limited | Construction | 2004 |
| Henry's Retreat Ltd | Hospitality | 2025 |
| HI Life Homes Ltd | Real estate | 2024 |
| Holmes Events Ltd | Arts & recreation | 2019 |
| Hughes and Jones (Llandovery) Limited | Wholesale & retail | 2025 |
| Hywel Richards Ltd | Wholesale & retail | 2020 |
| Inclusive Neighbourhoods Limited | Other services | 2011 |
| Independent Brewers Ltd Ltd | Hospitality | 2014 |
| Independent Vehicle Solutions (Wales) Limited | Administrative & support | 2023 |
| Infinite IG Limited | Professional & scientific | 2017 |
| Infinite Law Limited | Professional & scientific | 2017 |
| JE Detailing Ltd | Administrative & support | 2021 |
| JEK Farm Ltd | Agriculture & fishing | 2013 |
| JLT (Port Talbot) & Co Ltd | Wholesale & retail | 2019 |
| Jltech Ltd | Professional & scientific | 2006 |
| Jobs Lane Ltd | Real estate | 2022 |
| Jonathan Garrard Limited | Manufacturing | 2003 |
| Jones Bros Environmentals Ltd | Construction | 2026 |
| Jones International Holidays Ltd | Administrative & support | 2018 |
| Jones International Travel Ltd | Transport & logistics | 2015 |
| Jones LAN Rentals Ltd | Real estate | 2025 |
| KB Home Investments Ltd | Real estate | 2022 |
| KB Home Maintenance Ltd | Construction | 2026 |
| Keywest Leisure Group Ltd | Wholesale & retail | 2016 |
| Kings Head Cottages Ltd | Households | 2012 |
| KPM Electrical Services Ltd | Construction | 2023 |
| KSM500 Limited | Professional & scientific | 2024 |
| Kunzan Tandoori Limited | Hospitality | 2014 |
| L Vaughan & Co (Mumbles) Limited | Wholesale & retail | 2018 |
| LBW Livestock Ltd | Agriculture & fishing | 2025 |
| LBW Sport Ltd | Extraterritorial | 2011 |
| Leach Partnership Limited | Professional & scientific | 2018 |
| Leading Light Technology Services Ltd | Manufacturing | 2023 |
| Leverett Farming Limited | Agriculture & fishing | 2015 |
| Liliwen Limited | Agriculture & fishing | 2006 |
| Liven UP Limited | Construction | 2007 |
| Living Crete Holidays Limited | Transport & logistics | 2006 |
| Llandeilo Scaffolding and Roofing Contractors Ltd | Construction | 2025 |
| Llandeilo Service Station Ltd | Wholesale & retail | 2018 |
| Llansawel Agored Cyfyngedig | Other services | 2021 |
| Llansawel Recreation Field and Hall Trust | Arts & recreation | 2011 |
| Lloyd Morris Ltd | Administrative & support | 2023 |