| Estuary Commercial Utilities Ltd | Energy | 2021 |
| Estuary Energy Ltd | Energy | 2021 |
| Estuary Fuel Oils Limited | Mining & quarrying | 2020 |
| Estuary Fuels Limited | Mining & quarrying | 2020 |
| Euro Mechanical Engineering Limited | Administrative & support | 2018 |
| Eurographique Ltd | Manufacturing | 2010 |
| EV Association Cymru CIC | Other services | 2025 |
| Evaframe Property Limited | Financial services | 2022 |
| Evoqua Pension Trustees Limited | Financial services | 2014 |
| Evoqua Water Technologies Limited | Administrative & support | 2013 |
| Excalibur Hexa Group Ltd | Real estate | 2024 |
| Expert Commercial and Project Management Services Ltd | Professional & scientific | 2024 |
| Expimatch Ltd | Information & communication | 2024 |
| Extreme Rigging Limited | Professional & scientific | 2006 |
| Fantasy Greens Limited | Administrative & support | 2013 |
| FDH Property Ltd | Real estate | 2021 |
| Feom Limited | Wholesale & retail | 2024 |
| Fidelis Facilities Management Ltd | Administrative & support | 2025 |
| FIG Consultancy Ltd | Professional & scientific | 2025 |
| Firewise & Security Solutions Limited | Professional & scientific | 2025 |
| Fitzwilliams Engineering Limited | Professional & scientific | 2018 |
| Fluxbuy.Shop Ltd | Wholesale & retail | 2025 |
| FLY Hare Limited | Wholesale & retail | 2023 |
| FMD Equine Services Limited | Other services | 2023 |
| Foot Pulse Podiatry Limited | Health & social care | 2020 |
| Fortis Familia Ltd | Financial services | 2024 |
| Forza GB (Great Britain) Ltd | Wholesale & retail | 2008 |
| Forza SC (Supercars) Limited | Extraterritorial | 2015 |
| Fours Food Ltd | Manufacturing | 2024 |
| Frametech Construction, Building & Maintenance Limited | Construction | 2018 |
| Freedom Property Holdings Limited | Real estate | 2021 |
| Freedom Studios Europe Ltd | Information & communication | 2024 |
| Fryer Management Ltd | Other services | 2017 |
| FSL Management Limited | Professional & scientific | 2009 |
| Full Board Cafe Limited | Hospitality | 2025 |
| Fvfc Limited | Wholesale & retail | 2017 |
| G Quinn Consulting Limited | Professional & scientific | 2015 |
| G W Construction (South Wales) Limited | Construction | 2017 |
| G&T Home Improvements Ltd | Construction | 2023 |
| Gardens View Close Management Company Limited | Households | 2016 |
| Gembo Investments Ltd | Real estate | 2019 |
| Geocat Ltd | Real estate | 2018 |
| Gghm Ltd | Construction | 2023 |
| Gloucestershire Autograss League Limited | Arts & recreation | 1997 |
| GMB Driveways and Patios Limited | Construction | 2026 |
| Go Spinnaker Limited | Transport & logistics | 2020 |
| Goodnights Serviced Accommodation Ltd | Real estate | 2023 |
| Goodwillvouchers Ltd | Information & communication | 2013 |
| Gorilla Move Ltd | Transport & logistics | 2023 |
| GPA CPF Ltd | Financial services | 2026 |
| Gppc Ltd | Construction | 2025 |
| Grafton Property Holdings Limited | Real estate | 2026 |
| Graham Meacock Inspection Limited | Professional & scientific | 2018 |
| Grand Master Services Ltd | Construction | 2024 |
| Graphics Shack Ltd | Manufacturing | 2012 |
| Graphitex Limited | Manufacturing | 2015 |
| Green FOX Limited | Administrative & support | 2016 |
| Green HAT Stays Ltd | Hospitality | 2025 |
| Greener Energy Futures Ltd | Professional & scientific | 2019 |
| Greenimp Media Limited | Information & communication | 2021 |
| Greenland Development Group Ltd | Real estate | 2020 |
| Greystone Productions Ltd | Arts & recreation | 2014 |
| Grolman Limited | Wholesale & retail | 2001 |
| Ground Cover Garden Care Ltd | Administrative & support | 2023 |
| Growthvantage Limited | Health & social care | 2012 |
| GSF Homes Ltd | Real estate | 2018 |
| Guy-Hurley Property Ltd | Real estate | 2023 |
| Gwydion Ltd | Professional & scientific | 2011 |
| Gyles Blake Construction Limited | Construction | 2003 |
| H & P Property Developments Limited | Real estate | 2012 |
| H S W (Major 1) Recruitment Ltd | Administrative & support | 2020 |
| H&H Electrical Contractors (SW) Ltd | Construction | 2025 |
| H&M Detailing Ltd | Administrative & support | 2024 |
| H20 Site Services Ltd | Water & waste | 2019 |
| Hallstow Limited | Real estate | 2019 |
| Hall’S Property Lettings Ltd | Real estate | 2024 |
| Hamel Engineering Ltd | Professional & scientific | 2012 |
| Hannans Barbering Limited | Other services | 2026 |
| Hansonia Limited | Administrative & support | 2012 |
| Happy Frog Consulting Ltd | Professional & scientific | 2017 |
| Harris and SON Engineering Limited | Manufacturing | 2016 |
| Harris Property Renovations Ltd | Construction | 2021 |
| Hayesgate Osteopathy Limited | Health & social care | 2020 |
| Hayman Media LLP | | 2024 |
| Heaat Ltd | Real estate | 2024 |
| Heathman Homes Construction and Groundworks Ltd | Construction | 2025 |
| Hennylew Limited | Professional & scientific | 2016 |
| Henry T Pope Landscape Design Limited | Administrative & support | 2025 |
| Hercston Ltd | Professional & scientific | 2020 |
| Hicks Property Rentals Limited | Real estate | 2022 |
| Highfield Interiors Ltd | Construction | 2019 |
| Hjds Ltd | Professional & scientific | 2022 |
| Hnexus Ltd | Wholesale & retail | 2025 |
| Hot TUB Hire of Monmouthshire Ltd | Arts & recreation | 2018 |
| How-To-Repair Limited | Information & communication | 2020 |
| Hugh Gregory Consulting Ltd | Professional & scientific | 2014 |
| Hughes, Isaac & Co Limited | Professional & scientific | 1988 |
| Hussey Properties Limited | Real estate | 2016 |
| I Ruco Ltd | Health & social care | 2013 |
| I.B. Distribution Ltd | Transport & logistics | 2010 |