| Gradewish Limited | Real estate | 1994 |
| Grand Dale Limited | Professional & scientific | 2003 |
| Grange Park (Thurston) Management Company Limited | Households | 2021 |
| Grange Social and Sports Club Limited | Wholesale & retail | 2002 |
| Grant Sims Signs Limited | Construction | 2016 |
| Granteezy Ltd | Construction | 2025 |
| Granville James (Financial Planning) Limited | Financial services | 2008 |
| Granville James Limited | Professional & scientific | 2013 |
| Graphite (UK) Limited | Transport & logistics | 2000 |
| Gray Post Ltd | Information & communication | 2014 |
| GRC Consultancy (U.K.) Ltd | Professional & scientific | 2019 |
| Grease Lightning Ltd | Administrative & support | 2025 |
| Great Fish & Chips Ltd | Hospitality | 2025 |
| Great Fleete Management NO.2 Limited | Households | 1996 |
| Great Wakering Pre-School LLP | | 2010 |
| Greater Care Limited | Administrative & support | 2010 |
| Green & Handy Ltd | Other services | 2025 |
| Green Essex Investment Ltd | Real estate | 2024 |
| Green Light Print Solutions Limited | Manufacturing | 2007 |
| Green Oak Global Resources Ltd | Information & communication | 2024 |
| Green Oaks (Quedgeley) Management Company Limited | Households | 2020 |
| Green on Purpose Limited | Wholesale & retail | 2022 |
| Green Road Clinic Limited | Health & social care | 2003 |
| Green Shoots Services Limited | Transport & logistics | 2023 |
| Green Street Nominees Limited | Extraterritorial | 2004 |
| Greenfield Property Services Ltd | Other services | 2008 |
| Greenleaves (Billingshurst) Management Company Limited | Households | 2014 |
| Greenshoots Garden Services Limited | Administrative & support | 2003 |
| Greenwall Thermal Panels Ltd | Real estate | 2019 |
| Grey House Design & Build Ltd | Construction | 2014 |
| Grey House Design & Build Properties Limited | Real estate | 2020 |
| Grey House Developers Limited | Construction | 2023 |
| Grey Shield Security Services Ltd | Administrative & support | 2015 |
| Grey Starling Antiques Ltd | Wholesale & retail | 2025 |
| Grey Starling Ltd | Real estate | 2021 |
| Grhon Technologies Ltd | Information & communication | 2024 |
| Griffiths Evans Limited | Professional & scientific | 2018 |
| Grind Hsend Limited | Hospitality | 2024 |
| Grind Southend Limited | Hospitality | 2022 |
| GRN Integrated Services Limited | Construction | 2014 |
| Grnt Property Limited | Real estate | 2026 |
| Grosvenor Confectionery Company Limited | Real estate | 1951 |
| Ground Rent Partners Ltd | Real estate | 2010 |
| Ground Rent Residential Limited | Real estate | 2010 |
| Ground Rents 2011 Limited | Real estate | 2011 |
| Group Anaesthetists of Southend LLP | | 2023 |
| Group Gilbey Ltd | Construction | 2025 |
| Grove Lodge Management Co. (Shoebury) Limited | Households | 1988 |
| Groveland Services Limited | Administrative & support | 2020 |
| Groveland Solutions Limited | Administrative & support | 2020 |
| Grovemount Installations Limited | Professional & scientific | 2017 |
| Grow More Academy Ltd | Professional & scientific | 2025 |
| Growing Revolution Ltd | Professional & scientific | 2019 |
| Growthnest Ltd | Transport & logistics | 2024 |
| Growup Venture Ltd | Administrative & support | 2014 |
| GRP Resin Supplies UK Ltd | Wholesale & retail | 2025 |
| Grumpy FOX Limited | Information & communication | 2022 |
| Grumpy Malone Ltd | Hospitality | 2019 |
| Grumpy Takeaway Ltd | Hospitality | 2022 |
| Grw.It Limited | Administrative & support | 2023 |
| GS Bespoke Joinery Limited | Construction | 2016 |
| GS Electrics & Building Services Ltd | Construction | 2020 |
| GSS 1948 Limited | Financial services | 2020 |
| Guild of Assassins Ltd | Information & communication | 2024 |
| Guler Properties Limited | Real estate | 2017 |
| Gurunanakg Limited | Hospitality | 2025 |
| GV IT Ltd | Information & communication | 2019 |
| GWR Contractors Limited | Construction | 2023 |
| Gymnastic Trust Ltd. | Arts & recreation | 1997 |
| Gyproc Systems Limited | Administrative & support | 2007 |
| H & a Plumbing & Heating Ltd | Financial services | 2021 |
| H & D Contractor Limited | Construction | 2023 |
| H & Q Properties Ltd | Real estate | 2022 |
| H Dewar Ltd | Information & communication | 2019 |
| H Dype Limited | Administrative & support | 2024 |
| H R Thatching Limited | Construction | 2026 |
| H Salter & Sons Ltd | Construction | 2017 |
| H Z H Ltd | Other services | 2023 |
| H&C Air Ltd | Construction | 2021 |
| H&H Cosmatic Ltd | Wholesale & retail | 2025 |
| H&L Roofing Contractors Limited | Construction | 2024 |
| H.C.M. Windows & Doors Ltd | Construction | 2019 |
| H.W. Renall Limited | Wholesale & retail | 1952 |
| H2 BRO Solutions Limited | Administrative & support | 2025 |
| Habinest Ventures Ltd | Real estate | 2025 |
| Hadden Grove (East Didcot) Management Company Limited | Households | 2018 |
| Hadleigh Property Company Limited | Real estate | 2011 |
| Hadleigh Salvage (Recycling) Limited | Administrative & support | 1990 |
| Hagman's Emporium Limited | Wholesale & retail | 2022 |
| Hair & SON Group LLP | | 2008 |
| Hair at Three Doors Down Limited | Other services | 2024 |
| Hair Studio 23 Ltd | Other services | 2023 |
| Halalspark Ltd | Professional & scientific | 2025 |
| Halation Studios Ltd | Professional & scientific | 2025 |
| Haldon Reach (Alphington) Management Company Limited | Households | 2021 |
| Halgurd Market Ltd | Wholesale & retail | 2024 |
| Halle Mews Residents Freehold Limited | Households | 2023 |
| Halm Accountancy Services Ltd | Professional & scientific | 2015 |
| Halo Hair and Beauty (UK) Limited | Other services | 2012 |
| Hambury Tilmond Ltd | Administrative & support | 2012 |