| Dare to Dazzle Ltd | Wholesale & retail | 2023 |
| Darks Closing Ltd | Wholesale & retail | 2025 |
| Davies and Treasure Limited | Hospitality | 2024 |
| Dawkins Properties Ltd | Real estate | 2014 |
| DDE Roofing Ltd | Construction | 2023 |
| Delilicious J+C Ltd | Hospitality | 2026 |
| DG Alternative Investments Ltd | Financial services | 2012 |
| Distinctive Designs With A&R Ltd | Wholesale & retail | 2025 |
| Dixies Electrical and Maintenance Services Limited | Administrative & support | 2017 |
| DMK CF34 Ltd | Real estate | 2022 |
| DMK Residential Ltd | Households | 2020 |
| Dollcast Properties Limited | Real estate | 2018 |
| Dolly's Funfair Ltd | Arts & recreation | 2026 |
| Dragon House HK Takeaway Ltd | Hospitality | 2013 |
| Draig Access NDT Limited | Professional & scientific | 2025 |
| DRH Holdings Limited | Real estate | 2024 |
| E C Fishbar Ltd | Hospitality | 2019 |
| Easy EPC Ltd | Professional & scientific | 2020 |
| Eco Build (South Wales) Ltd | Construction | 2022 |
| Ecolec Maintenance Installation Services Ltd | Construction | 2011 |
| Eddiestar Limited | Real estate | 2019 |
| Elegant Essence by Cath Ltd | Wholesale & retail | 2025 |
| Eljax Energy Consultants Limited | Energy | 2018 |
| ELS Environmental Management Limited | Professional & scientific | 2024 |
| Elsplumbing Limited | Construction | 2025 |
| Emilov Ltd | Hospitality | 2026 |
| EOS Property Maintenance Services Ltd | Construction | 2023 |
| Eternal Memories Limited | Wholesale & retail | 2022 |
| ETG Home Improvements Ltd | Construction | 2025 |
| Evans Cable & Electrical Services Ltd | Construction | 2017 |
| Every Link Counts | Other services | 2007 |
| Evox Academy Ltd | Education | 2025 |
| Ewan Squires Ltd | Information & communication | 2025 |
| Express Pipeing Limited | Construction | 2005 |
| Fairfield Nutrition Limited | Health & social care | 2024 |
| Fairfield Tool & DIE Company (Maesteg) Limited | Manufacturing | 1976 |
| FC Electrical (Wales) Limited | Construction | 2013 |
| Felin Isaf CYF. | Agriculture & fishing | 2024 |
| Ferrier & Thomas Limited | Real estate | 2007 |
| Ferriers Mortgage Services Limited | Financial services | 2022 |
| Filip Damian Ltd | Transport & logistics | 2025 |
| Fish Bite Maesteg Ltd | Hospitality | 2023 |
| Fjjt Ltd | Professional & scientific | 2024 |
| Florinel Company Ltd Ltd | Transport & logistics | 2023 |
| Foedus Global Ltd | Wholesale & retail | 2015 |
| Forge Travel Limited | Wholesale & retail | 2009 |
| Forged Functional Fitness Limited | Arts & recreation | 2026 |
| Foursons Property Ltd | Wholesale & retail | 2025 |
| Fuss Windows & Doors Ltd | Construction | 2023 |
| G W Plastering Limited | Construction | 2019 |
| G.Lewis Site Engineering Ltd. | Construction | 2015 |
| GC Rooms and Renovations Ltd | Real estate | 2023 |
| GCB Food Ltd | Hospitality | 2025 |
| Geraint W Jones Limited | Agriculture & fishing | 2005 |
| Ginsei Mizuki Core Ltd | Financial services | 2025 |
| Glamorgan Drainage Solutions Ltd | Water & waste | 2026 |
| Glgscaffolding Ltd | Construction | 2022 |
| Greenfield Street Allotments Management Company Limited | Administrative & support | 2008 |
| Greenteam Heating & Energy Design Limited | Professional & scientific | 2025 |
| Greenteam Installations Limited | Construction | 2025 |
| Ground & Pound Burger City Ltd | Hospitality | 2025 |
| GT Motors Maesteg Ltd | Wholesale & retail | 2025 |
| GWA Properties Limited | Real estate | 2026 |
| Gym Engineers (U.K.) Ltd | Extraterritorial | 2021 |
| H & G Trading Limited | Extraterritorial | 2009 |
| H.C.Herbert & Sons Ltd | Transport & logistics | 2013 |
| HAF Organic Ltd | Agriculture & fishing | 2023 |
| Hallows Care (Franchising) Limited | Professional & scientific | 2015 |
| Happy Little Monkeys Limited | Wholesale & retail | 2006 |
| Hardcastle Rail Ltd | Construction | 2023 |
| Hardings Courier Services Ltd | Transport & logistics | 2019 |
| Harriett David's Academy of Dance Limited | Arts & recreation | 2023 |
| Heatherdene Properties Limited | Construction | 2002 |
| Hermon Horizons Ltd | Real estate | 2025 |
| HJE Group Ltd | Administrative & support | 2020 |
| Hojet Consulting Limited | Financial services | 2019 |
| Hollow & Heart Ltd | Wholesale & retail | 2026 |
| Hornproperty Ltd | Real estate | 2025 |
| Howard-Higgins International Limited | Agriculture & fishing | 2014 |
| HW (Maesteg) Ltd | Hospitality | 2019 |
| Hydroline (Wales) Limited | Construction | 2006 |
| IAN Rees Greenfield Garage Maesteg Limited | Wholesale & retail | 2007 |
| Iced Cake Parlour Limited | Administrative & support | 2017 |
| Igglow Ltd | Arts & recreation | 2025 |
| Immortal Pictures Limited | Information & communication | 2003 |
| Infinity Technologies Ltd | Information & communication | 2014 |
| Inscapes Environmental Limited | Professional & scientific | 2018 |
| Investa Wealth Management Limited | Financial services | 2013 |
| IO Developments Ltd | Construction | 2018 |
| IPL Plant Ltd | Manufacturing | 2010 |
| Ivy&Rose Softplay Ltd | Wholesale & retail | 2025 |
| J&F Building Ltd | Construction | 2026 |
| J.T. Plumbing and Heating Services Limited | Construction | 2003 |
| JA Cable Installation Ltd | Construction | 2023 |
| Japanese Knotweed Remediation Limited | Administrative & support | 2019 |
| Jayani Investments Ltd | Real estate | 2021 |
| Jonathans House CIC | Hospitality | 2024 |
| Jones Developments (South Wales) Ltd | Construction | 2022 |
| JPD Construction &Cladding Limited | Construction | 2017 |
| JZ NC Ltd | Hospitality | 2024 |