| Dynacast Holdings Limited | Financial services | 1996 |
| Dynacast UK Parent Limited | Professional & scientific | 2011 |
| Dynamic Tech Systems Ltd | Mining & quarrying | 2024 |
| Dyos Group Assets Ltd | Real estate | 2024 |
| Eagle Safety & Environment Limited | Professional & scientific | 2010 |
| EB Davies Timber Ltd | Agriculture & fishing | 2009 |
| Ecological Advisors Ltd | Professional & scientific | 2025 |
| ED Tomkiss Brickwork Limited | Construction | 2015 |
| ED Tomkiss Construction Ltd | Construction | 2021 |
| Electric Horse Limited | Construction | 2023 |
| Elevate Balloon Flights Ltd | Transport & logistics | 2023 |
| Elgar Learning Limited | Education | 2014 |
| Eltec Electrical Services Limited | Administrative & support | 2021 |
| Emberton Property Limited | Real estate | 2013 |
| Emily Mcgill Ltd | Households | 2025 |
| Emonda Global Limited | Financial services | 2025 |
| Emonda Limited | Administrative & support | 2023 |
| Endless Edge Limited | Information & communication | 2025 |
| Enersyst Powersystems Limited | Extraterritorial | 2019 |
| Enlitn Limited | Information & communication | 2012 |
| ER Thomas Limited | Professional & scientific | 2006 |
| Erhat's Kebab House Ltd | Hospitality | 2025 |
| Evans Rural Enterprises Ltd | Agriculture & fishing | 2025 |
| Evison Care Consultancy Ltd | Professional & scientific | 2025 |
| Evolution Heritage Ltd | Professional & scientific | 2022 |
| Evolution Rotacasters Ltd | Administrative & support | 2007 |
| Evolutionary Lifestyle Ltd | Information & communication | 2020 |
| Exsel Electronics Limited | Manufacturing | 2017 |
| Farrah’S Flowers Ltd | Wholesale & retail | 2026 |
| Fast Air Ltd | Extraterritorial | 2005 |
| Fern Natural Holistic Centre Ltd | Health & social care | 2016 |
| Field Mouse Designs Ltd | Arts & recreation | 2023 |
| Finest Fettle Limited | Transport & logistics | 2014 |
| Firecode Training Limited | Professional & scientific | 2024 |
| Fishercast UK Limited | Extraterritorial | 2008 |
| Flipus Transport Limited | Transport & logistics | 2018 |
| Flotec Plumbing Services Limited | Construction | 2021 |
| Forden Farriers Limited | Agriculture & fishing | 2003 |
| Fortune Star Takeaway Limited | Hospitality | 2026 |
| FOX Complex Limited | Real estate | 2018 |
| Fractal (Golfa) Limited | Professional & scientific | 2022 |
| Freezprice Ltd | Information & communication | 2025 |
| Funky Feet Fashions Limited | Wholesale & retail | 2003 |
| Future Geoscience Ltd | Professional & scientific | 2017 |
| Future Surveying Ltd | Professional & scientific | 2020 |
| G & R Davies & Sons Limited | Real estate | 2023 |
| G C Morgan Limited | Professional & scientific | 2003 |
| G F Potter Limited | Extraterritorial | 2019 |
| Galalent Limited | Administrative & support | 1986 |
| Garry Biechmann Dctepis Limited | Construction | 2023 |
| Gate Farm Direct Sales Limited | Manufacturing | 2019 |
| Gelert Angus Mcmoose Limited | Real estate | 2019 |
| Generation X Computers Limited | Professional & scientific | 2003 |
| George Stanners Limited | Other services | 2021 |
| GF & JE Potter Garages Limited | Real estate | 1997 |
| Gifts of Wales Ltd | Wholesale & retail | 2020 |
| GLM Services Ltd | Manufacturing | 2001 |
| Glover-Davies Limited | Financial services | 2014 |
| Gloversure Limited | Information & communication | 2004 |
| Golden Key Investments Limited | Real estate | 2024 |
| GP Training Services Ltd | Public administration | 2025 |
| Grain & Glory Ltd | Hospitality | 2026 |
| Greats Escape Limited | Arts & recreation | 2013 |
| Greats Fitness Limited | Arts & recreation | 2011 |
| Griffiths Hills Advisory Ltd | Professional & scientific | 2026 |
| Groes Close Management Company Limited | Households | 2008 |
| Gronwyn Ltd | Hospitality | 2025 |
| Group Finance Solutions Consulting Limited | Information & communication | 2007 |
| GRS Drone Services Limited | Public administration | 2024 |
| GT Electrical Services SY Ltd | Construction | 2019 |
| Guartel Surveillance and Security Systems Limited | Extraterritorial | 2002 |
| Guartel Technologies Limited | Manufacturing | 2002 |
| Guilsfield Local Ltd | Wholesale & retail | 2019 |
| Gwynne J Thomas Limited | Transport & logistics | 2012 |
| Gwynt Cymru Limited | Energy | 2003 |
| Gyfylchau Limited | Financial services | 2025 |
| Hafren Scientific Ltd | Professional & scientific | 2008 |
| Hall Agri Limited | Wholesale & retail | 2025 |
| Hamer Leisure Caravan Sales Ltd | Wholesale & retail | 2016 |
| Harding and Jones Property Ltd | Real estate | 2023 |
| Harries Services Limited | Agriculture & fishing | 2018 |
| Harris & Evans Builders Limited | Construction | 2002 |
| Harrisons Solicitors LLP | | 2006 |
| Haswol Ltd | Education | 2020 |
| HC Education Limited | Education | 2025 |
| HCT Pubs Ltd | Hospitality | 2019 |
| Heavenly Scents Cleaning Services Limited | Administrative & support | 2023 |
| Heck Press Ltd | Manufacturing | 2025 |
| Help in Homes Ltd | Administrative & support | 2022 |
| Henfaes 12-18 Limited | Hospitality | 2011 |
| Heritage Green Management Company Limited | Households | 2018 |
| Heulwen Trust | Health & social care | 1992 |
| HGE Supplies Limited | Wholesale & retail | 2021 |
| Hillside Parks Limited | Construction | 1987 |
| Hilltop Holidays Ltd | Hospitality | 2021 |
| Hitch & TOW Limited | Wholesale & retail | 2016 |
| Hogs Apartments Ltd | Real estate | 2025 |
| Hogs Inn Group Limited | Financial services | 2026 |
| Hogs Inn the Pinewood Ltd | Hospitality | 2025 |
| Hogs Inn the Tankard Ltd | Hospitality | 2026 |