| Falcon Installations Limited | Construction | 2002 |
| Faml:Es Solutions Ltd. | Real estate | 2016 |
| Farm Dynamics Ltd | Professional & scientific | 2015 |
| Fashion Impex Limited | Wholesale & retail | 2004 |
| FE Costumes Ltd | Arts & recreation | 2026 |
| Festac Limited | Wholesale & retail | 2009 |
| Fforest Green Limited | Extraterritorial | 2011 |
| FFT Education Limited | Information & communication | 1998 |
| Fidmac Limited | Professional & scientific | 1998 |
| Fine Finishing (Decorators) Limited | Construction | 2019 |
| First Class Podiatry Ltd | Health & social care | 2019 |
| Five Foot Seven Ltd | Information & communication | 2025 |
| Flokk Claims Ltd | Financial services | 2021 |
| Floors on Floors Limited | Wholesale & retail | 2010 |
| Focus Construction Consultancy Limited | Professional & scientific | 2011 |
| Fontycarlo Limited | Hospitality | 2026 |
| Fore Right Golf Ltd. | Arts & recreation | 2014 |
| Four Capes Ltd | Wholesale & retail | 2023 |
| Foxbury Solutions Ltd | Public administration | 2017 |
| Franklyn Farm Limited | Agriculture & fishing | 2023 |
| Fredbel Investments Limited | Real estate | 2003 |
| Freshfind Limited | Real estate | 2006 |
| Friends of Coed Hills (Cariad O Coed Hills) | Arts & recreation | 2006 |
| Front Door Communications Limited | Professional & scientific | 2015 |
| Front Door Property Ltd | Real estate | 2025 |
| FUN Foundations Day Nursery Limited | Education | 2010 |
| Future Carbon Global Ltd | Professional & scientific | 2022 |
| G & M Sales Limited | Administrative & support | 2014 |
| G Elec Installations Ltd | Construction | 2024 |
| G&J Morgan Limited | Real estate | 2014 |
| G. Oakley & Sons Ltd | Construction | 2000 |
| Gail Armytage Limited | Wholesale & retail | 2003 |
| Gallaghers Contractors Services Limited | Construction | 2009 |
| Gareth John Consulting LLP | | 2006 |
| Gareth Thomas Youth Services Limited | Health & social care | 2020 |
| Gastro-E-Learn Limited | Health & social care | 2011 |
| GDL Building Contractors Ltd | Construction | 2024 |
| Gemlytics Ltd | Information & communication | 2024 |
| Giggle Tipple Ltd | Wholesale & retail | 2018 |
| GIGGLE2GROW Ltd | Manufacturing | 2026 |
| Glamorgan White Lining Limited | Construction | 1999 |
| GLD Real Estate Limited | Real estate | 2006 |
| Glebe Farm Produce LLP | | 2015 |
| Glyndwr Tours Limited | Administrative & support | 2026 |
| Glyndwr Vineyard Limited | Agriculture & fishing | 1931 |
| Glyndwr Vineyard Wales Ltd | Hospitality | 2016 |
| Go Corporate Finance Ltd | Financial services | 2024 |
| Gofal Moore DDA Ltd | Health & social care | 2024 |
| Goldcrest Medical Ltd | Health & social care | 2018 |
| Golden WOK Takeaway Limited | Hospitality | 2024 |
| GR Dog Training Limited | Other services | 2022 |
| Graham Givens Limited | Health & social care | 2008 |
| Great House Farm Ltd | Hospitality | 2024 |
| Green Valley Farming Limited | Agriculture & fishing | 1998 |
| Greenbox Agriculture Limited | Agriculture & fishing | 2025 |
| Greendown Services Limited | Administrative & support | 2025 |
| Greening Construction Ltd | Construction | 2023 |
| Greenwood Waste Brokers Ltd | Water & waste | 2025 |
| Gregory Corp Limited | Professional & scientific | 2025 |
| Greytree Associates Ltd | Professional & scientific | 2024 |
| Grid Line Surveys Ltd | Professional & scientific | 2011 |
| GRJ 2012 Limited | Financial services | 2015 |
| Guidemy Group Limited | Wholesale & retail | 2015 |
| Gwarant Morgannwg CYF | Administrative & support | 2024 |
| H Boss Construction Limited Ltd | Construction | 2020 |
| H.R. Thomas Limited | Real estate | 2014 |
| H3R Consult Ltd | Information & communication | 2015 |
| Hafod Mastering Limited | Arts & recreation | 2008 |
| Halcyon Medica Limited | Health & social care | 1999 |
| Halewood Shoes Limited | Financial services | 1962 |
| Hammarr Ltd | Manufacturing | 2025 |
| Handipod Limited | Manufacturing | 2015 |
| Hare & Hounds Group Hotel Ltd | Hospitality | 2025 |
| Hare & Hounds Group Ltd | Hospitality | 2025 |
| Harmaxal Ltd | Health & social care | 2018 |
| Harram Developments (South Wales) Limited | Real estate | 2011 |
| Hart Jones Consultancy Ltd | Health & social care | 2019 |
| Hartree Property Ltd | Real estate | 2018 |
| Hascelik UK Ltd | Wholesale & retail | 2018 |
| Haus Contemporary Furnishings Ltd | Other services | 2011 |
| Haven FM (Pembrokeshire) Limited | Information & communication | 2000 |
| Hawke Land Projects Limited | Professional & scientific | 2023 |
| Hawthorn UK Projects Ltd | Professional & scientific | 2023 |
| Hbdpjd Ltd | Arts & recreation | 2019 |
| HDJ Consultancy Ltd | Professional & scientific | 2025 |
| Hearth Care Systems Ltd | Professional & scientific | 2021 |
| Heat Exchanger Services (Wales) Limited | Manufacturing | 1996 |
| Heathcock Bakery Ltd | Hospitality | 2020 |
| Helm Positive Workplaces Limited | Administrative & support | 2016 |
| Hensam Consulting Limited | Administrative & support | 2022 |
| Hensam Properties Limited | Real estate | 2024 |
| Hensol Group Ltd | Agriculture & fishing | 2022 |
| Herberts Management Company Limited | Water & waste | 2007 |
| Heritage Coast Honey Ltd | Hospitality | 2023 |
| Heritage Tourism and Events Ltd | Administrative & support | 2017 |
| Heronston Barn Cottage Limited | Hospitality | 2007 |
| HF Minis Ltd | Wholesale & retail | 2025 |
| Hg&Rg Ltd. | Construction | 2009 |
| Hiliary's Kitchen Limited | Hospitality | 2007 |
| HL Design Consultancy Ltd | Professional & scientific | 2017 |