| Creative Wood Solutions Ltd | Manufacturing | 2013 |
| Credu Supporting Young and Adult Carers Limited | Health & social care | 2003 |
| Crooked Pool Logs Ltd | Agriculture & fishing | 2011 |
| Crowden International Search Ltd | Professional & scientific | 2018 |
| Crystalline Windows & Doors Limited | Construction | 2021 |
| Cura Terra Retreat Ltd | Health & social care | 2025 |
| Curlew Hotline (Powys) Community Interest Company | Professional & scientific | 2021 |
| CUT Above Tree Services Limited | Administrative & support | 2025 |
| CWM Chwefru Management Limited | Hospitality | 1987 |
| Cwmdu Car Club Ltd | Arts & recreation | 2025 |
| Cwtch @ Llew Coch Ltd | Hospitality | 2022 |
| D & C Price Ltd | Agriculture & fishing | 2025 |
| D Bridgewater Steel Buildings Ltd | Construction | 2012 |
| D.F. Harris and SON | | 1997 |
| Davies John Accountants Limited | Professional & scientific | 2010 |
| Ddole Road Veterinary Clinic Limited | Professional & scientific | 2018 |
| Delfin Investments Limited | Administrative & support | 2011 |
| Delves Subway Limited | Hospitality | 2015 |
| Dentron Limited | Manufacturing | 1989 |
| Deziderat Limited | Real estate | 2025 |
| Dilwyns Limited | Professional & scientific | 2016 |
| Dirt N Dust Limited | Wholesale & retail | 2025 |
| Divine Care and Support Services(Wales) Limited | Health & social care | 2023 |
| DNS Windows & Doors Ltd | Construction | 2025 |
| Dolwen Garage Limited | Real estate | 1984 |
| DON Graham Fitness Limited | Arts & recreation | 2023 |
| DON Graham Fitness Studios Limited | Arts & recreation | 2026 |
| DTP Xtreme Ltd | Extraterritorial | 2014 |
| Dubacle Limited | Professional & scientific | 1983 |
| Duke Beverages Limited | Manufacturing | 2020 |
| Dundeis (UK) Ltd | Manufacturing | 2002 |
| Dyfodol Powys Futures | Health & social care | 2008 |
| E.Z.T. Mouldings Limited | Manufacturing | 1996 |
| Earthbound Organics International Limited | Manufacturing | 2011 |
| Edwards Peak Ltd | Wholesale & retail | 2025 |
| Elina Barber Ltd | Other services | 2025 |
| Ellarose Homecare Services Limited | Health & social care | 2015 |
| Ellis Eggs Holdings Limited | Financial services | 2024 |
| Elmwood Forge Limited | Financial services | 2021 |
| Emporium Flats Management Limited | Households | 2005 |
| Environment Systems Limited | Professional & scientific | 2003 |
| Epynt Motor Club Limited | Arts & recreation | 1990 |
| ERD Property Limited | Real estate | 2025 |
| ERH Powertrain Solutions Limited | Professional & scientific | 2023 |
| Essential Market Ltd | Wholesale & retail | 2025 |
| Evans Partnership Ltd | Real estate | 2022 |
| Evesham Autograss Club Limited | Arts & recreation | 1981 |
| Fast VET Limited | Professional & scientific | 2025 |
| Feakins OIL Recoveries Limited | Extraterritorial | 2010 |
| Fernant Micro Hydro Company Limited | Energy | 2013 |
| First Steps Nursery Y Garth Ltd | Other services | 2024 |
| Fish Disease Dolau Ltd. | Agriculture & fishing | 2014 |
| Fix-O-Phones Limited | Wholesale & retail | 2024 |
| Flomp LLP | | 2008 |
| Forest of Dean Lodges Ltd | Hospitality | 2012 |
| Fourfold Property Ltd | Real estate | 2022 |
| From the Anvil Limited | Extraterritorial | 2022 |
| Fruitless Ltd | Real estate | 2021 |
| Funding EYE Limited | Professional & scientific | 2011 |
| Furniturebox Limited | Wholesale & retail | 2002 |
| G B T Design Services Limited | Professional & scientific | 2008 |
| G R Morris Ltd. | Construction | 2013 |
| Gadget Productions Limited | Information & communication | 2008 |
| Gareth M Jones Limited | Real estate | 2017 |
| Garrabost Administrators Limited | Administrative & support | 2015 |
| Garrabost Limited | Administrative & support | 2015 |
| Garrabost Trustees Limited | Professional & scientific | 2015 |
| Garth House Consulting Limited | Information & communication | 2004 |
| Gary Bevan Groundworks Ltd | Construction | 2023 |
| Gaufron Investments (2012) Limited | Real estate | 2012 |
| Gaufron Investments Limited | Real estate | 2005 |
| GD Health Ltd | Health & social care | 2012 |
| GD Middleton Limited | Transport & logistics | 2005 |
| George's Taxi 22 Ltd | Transport & logistics | 2021 |
| GJM Wales Ltd | Wholesale & retail | 1998 |
| Glaslyn Trading Limited | Extraterritorial | 2014 |
| GLM Services Group Ltd | Wholesale & retail | 2025 |
| Golden Link Care Services Limited | Health & social care | 2013 |
| Grand Pavilion Events C.I.C. | Arts & recreation | 2016 |
| Great House Garage Ltd | Wholesale & retail | 2022 |
| GVR Electrical Services Limited | Construction | 2015 |
| Halbear Networking & Software Ltd | Information & communication | 2025 |
| Hand Forged Limited | Extraterritorial | 2005 |
| Hand in Hand Community Care Limited | Hospitality | 2013 |
| Hannahnash Ltd | Health & social care | 2023 |
| Hano Midland Ltd | Other services | 2025 |
| Hawthornden Management (Llandrindod) Limited | Households | 2018 |
| Haydn Lewis Financial Services Limited | Financial services | 2004 |
| HD1 Fitness Limited | Arts & recreation | 2020 |
| Heart of Wales Lodges Limited | Hospitality | 2015 |
| Henry and Williams Property Group Limited | Real estate | 2026 |
| Henty Close Limited | Other services | 2025 |
| HH Llandod Ltd | Hospitality | 2025 |
| Highland Moors Properties Limited | Real estate | 2025 |
| Hinkle & Begbie Investments Limited | Real estate | 2020 |
| Hoboarmour Ltd | Wholesale & retail | 2026 |
| Holistic Psychology Services Limited | Health & social care | 2022 |
| Hostday Limited | Administrative & support | 2010 |
| Humanities & Social Science Tutoring Ltd | Education | 2021 |
| Hwgga Studios Limited | Wholesale & retail | 2021 |