| Dowhatyouwannado Ltd | Households | 2025 |
| Downing and Family Limited | Real estate | 2019 |
| Dpgo Accounting Limited | Professional & scientific | 2021 |
| Draig Media Ltd | Information & communication | 2012 |
| DRL Consulting Ltd | Information & communication | 2025 |
| Dumpaskips Limited | Extraterritorial | 2014 |
| Dumpawaste Limited | Water & waste | 2013 |
| Easton Estates Ltd | Real estate | 2013 |
| Eatsalt Ltd | Wholesale & retail | 2020 |
| Edge Facilities Management Limited | Construction | 2004 |
| ELM Grove House Management Company Limited | Real estate | 2009 |
| EN Hakkore Ltd | Real estate | 2026 |
| FID Natural Treats Ltd | Wholesale & retail | 2023 |
| Flawless Flooring Specialists Ltd | Construction | 2026 |
| Forster Dowling Limited | Professional & scientific | 2016 |
| Frank Lewis House Management Company Limited | Real estate | 2014 |
| Funding Logistics Ventures Limited | Financial services | 2014 |
| Funraiser Ltd | Arts & recreation | 2022 |
| G & M Shaw Developments (Wales) Limited | Real estate | 2016 |
| G & M Shaw Property Development Limited | Real estate | 2021 |
| GB Walters Limited | Real estate | 2020 |
| Gerwyn Lloyd Designs Limited | Information & communication | 2015 |
| GET the Chance C.I.C. | Education | 2015 |
| Gibbon & Carey Properties Ltd | Real estate | 2025 |
| Gibbon & Frankland Properties Ltd | Real estate | 2025 |
| Ginatra Ltd | Arts & recreation | 2020 |
| Glen Harry (Haulage) Limited | Transport & logistics | 1983 |
| Glenn Griffith Quality Butcher & Deli Limited | Wholesale & retail | 2023 |
| GMI UK Ltd | Education | 2009 |
| Golau Cymru Cyfyngedig | Administrative & support | 2018 |
| Good Governance Ltd | Professional & scientific | 2010 |
| Green Circle Sustainable Developments Ltd. | Other services | 1996 |
| Greenfield Dental Care Limited | Health & social care | 2010 |
| Grill & Oven Ltd | Hospitality | 2018 |
| Gritty Productions Limited | Information & communication | 2013 |
| GUI Broadcast Limited | Information & communication | 2014 |
| Gunfox Limited | Real estate | 1980 |
| Gwena Ltd | Health & social care | 2016 |
| Gwyllgi Ltd | Information & communication | 2020 |
| H D Ready Limited | Information & communication | 2014 |
| H2O Graphics Ltd | Wholesale & retail | 2021 |
| Hair at the Head Space Limited | Other services | 2023 |
| Happy Embroidery Limited | Manufacturing | 1998 |
| Health Hub Academy Ltd | Health & social care | 2020 |
| Health Options Wales Limited | Health & social care | 2023 |
| Heath Prop Services Limited | Arts & recreation | 2015 |
| Highlight Planning Ltd | Professional & scientific | 2021 |
| Hong LOU Limited | Hospitality | 2018 |
| Hubbub Counselling Limited | Professional & scientific | 2018 |
| Hudsonrose Limited | Real estate | 2017 |
| Humo Ltd | Professional & scientific | 2023 |
| Hung 88 Limited | Hospitality | 2025 |
| Husk Hammocks Limited | Wholesale & retail | 2018 |
| Ibiza Bible Ltd | Administrative & support | 2021 |
| Ignite (Big Ideas) | Other services | 2012 |
| Immersive Meditation Ltd | Health & social care | 2023 |
| Infinet IT Solutions Limited | Wholesale & retail | 2024 |
| Insideout Project Management Limited | Construction | 2026 |
| Install & Service Electrical Ltd | Manufacturing | 2011 |
| Ipma Trading Ltd | Wholesale & retail | 2024 |
| Isla-Alexander Lettings Limited | Real estate | 2022 |
| Island Leisure (Wales) Limited | Real estate | 1990 |
| Ivorfire Safety Services Limited | Public administration | 2010 |
| J & S Bridle Associates Limited | Administrative & support | 2004 |
| J G H Computer Services Limited | Construction | 1989 |
| J S Garib Limited | Real estate | 2023 |
| J.R. Management Services Limited | | 1979 |
| JCA Television Limited | Information & communication | 2013 |
| JCD Carpentry Ltd | Manufacturing | 2024 |
| Jgbg ORG Limited | Wholesale & retail | 2026 |
| Jimmy JIB DOT NET Ltd | Information & communication | 2005 |
| Jobify Limited | Information & communication | 2022 |
| JWJ Clean Ltd | Administrative & support | 2019 |
| Jwsd Research Management Limited | Professional & scientific | 2017 |
| Kcpm Property Ltd | Real estate | 2024 |
| Kitchen at NO.12 Limited | Hospitality | 2014 |
| KPS Construction Ltd | Construction | 2010 |
| Langcross Farm Ltd | Agriculture & fishing | 2015 |
| Leisure Active Education Ltd | Education | 2022 |
| Lemon PIE Developments Ltd | Real estate | 2022 |
| Linden Property Developments Ltd | Other services | 2025 |
| Lindenstone Limited | Wholesale & retail | 2024 |
| Little Earring Company Ltd | Wholesale & retail | 2024 |
| Little Green Westra Limited | Other services | 2017 |
| Llunyddllyniau Cyfyngedig | Information & communication | 2021 |
| Lois Evelyn Assets Ltd | Real estate | 2013 |
| Longmeadow Consultancy Ltd | Financial services | 2013 |
| LOX Auto Locksmith Ltd | Other services | 2026 |
| Lyon Imports (UK) Limited | Administrative & support | 2023 |
| Marc Buehner Coaching Ltd | Information & communication | 2021 |
| Matthew Revell-Griffiths Limited | Arts & recreation | 2020 |
| Matthews Maintenance Limited | Construction | 2016 |
| Mattyja Productions Ltd | Information & communication | 2016 |
| Metro Eatery Ltd | Hospitality | 2022 |
| MGE Consultants UK Ltd | Professional & scientific | 2022 |
| Middleton Perry Limited | Real estate | 2005 |
| Mikrogen Media Limited | Information & communication | 2015 |
| Milky Sweats Ltd | Wholesale & retail | 2023 |
| Millbrook Accountancy Services Ltd | Professional & scientific | 2023 |
| MJ Lewis Plumbing & Heating Ltd | Construction | 2014 |