| Gillett Morrissey Limited | Construction | 2008 |
| Ginger Indigo Limited | Real estate | 2020 |
| GJB Developments Limited | Manufacturing | 1990 |
| GJB Holdings Limited | Professional & scientific | 1991 |
| GJB New Build Ltd | Manufacturing | 2010 |
| GJC Estates Ltd | Real estate | 2023 |
| GK Surveying Limited | Professional & scientific | 2023 |
| Glencrest Seatex Limited | Manufacturing | 1983 |
| Glendale International Limited | Transport & logistics | 1991 |
| Global IT Reuse Ltd | Wholesale & retail | 2025 |
| Global IT Solutions UK Limited | Information & communication | 2006 |
| Go Fundraising Limited | Administrative & support | 2023 |
| Go Group Holdings Limited | Financial services | 2018 |
| Go Privilege Limited | Other services | 2019 |
| Go Property Group Limited | Administrative & support | 2020 |
| Go Sporting Limited | Arts & recreation | 2013 |
| Go Xchange Limited | Financial services | 2017 |
| Golding Accountancy Ltd | Professional & scientific | 2013 |
| Golding Acqco Ltd | Financial services | 2023 |
| Golding BAL Ltd | Professional & scientific | 2012 |
| Golding DCA Ltd | Professional & scientific | 2011 |
| Golding GPA Ltd | Professional & scientific | 2023 |
| Golding Holdco Ltd | Financial services | 2026 |
| Golding NTA Ltd | Professional & scientific | 2026 |
| Goldsmith Property Services Limited | Construction | 2016 |
| Gonystylus Ltd | Wholesale & retail | 2020 |
| Good Fortune Homes Limited | Construction | 2025 |
| Good Girl Publishing Limited | Information & communication | 2024 |
| GP Autoclimate Ltd | Wholesale & retail | 2016 |
| Graham Electrical Limited | Professional & scientific | 2009 |
| Grange Marketing (UK) Ltd | Wholesale & retail | 2000 |
| Grangeway Limited | Professional & scientific | 2020 |
| Granite Building Developments Limited | Construction | 2021 |
| Granite Windows and Doors Limited | Construction | 2020 |
| Grapevine Capital Limited | Information & communication | 2005 |
| Graphion Witt Limited | Information & communication | 2020 |
| Grass Roots Genealogy Ltd | Arts & recreation | 2017 |
| Grateful Heads Limited | Other services | 2003 |
| Greater London Financial Services Ltd | Financial services | 2024 |
| Green for Doors Limited | Administrative & support | 2026 |
| Green Plumbing and Heating Ltd | Construction | 2019 |
| Greenglow Solar Ltd | Construction | 2025 |
| Greensail Holdings Ltd | Real estate | 2018 |
| Greentech Plumbing & Drainage Ltd | Construction | 2024 |
| Gregory Dean Rayleigh Limited | Other services | 2018 |
| Grey Logic Consulting Ltd | Information & communication | 2023 |
| Gridjems Limited | Information & communication | 2025 |
| Grove Road Pre-School | Education | 2010 |
| Grove Windows Limited | Construction | 2002 |
| Grove Wood Academy Trust | Education | 2014 |
| Growology Ltd | Manufacturing | 2020 |
| Growvia Solutions Ltd | Professional & scientific | 2025 |
| GTA Grill Ltd | Hospitality | 2018 |
| GUS Campbell Photography Limited | Professional & scientific | 2007 |
| GWC Data Limited | Information & communication | 2024 |
| Gymnastics 4 Dancers Limited | Education | 2021 |
| H F Installations Ltd | Construction | 2006 |
| H&O Homes Limited | Professional & scientific | 2015 |
| H&S Commercial Property Ltd | Real estate | 2020 |
| H&S Drywall Limited | Construction | 2011 |
| H&S Insulation Limited | Construction | 2015 |
| H'S Customs Ltd | Wholesale & retail | 2023 |
| H.I.G.S. Solutions Limited | Information & communication | 2004 |
| H.O.P.E Developments (Essex) Ltd | Construction | 2018 |
| Haines Consulting Limited | Professional & scientific | 2010 |
| Hair Ornaments UK Limited | Wholesale & retail | 2008 |
| Hamish Lettings Ltd | Real estate | 2024 |
| Hanbury Drive Management Company Limited | Real estate | 2013 |
| Happier People Ltd | Health & social care | 2019 |
| Happier Property Ltd | Real estate | 2019 |
| Happy Days Nursery (Rayleigh) Limited | Education | 2016 |
| Happy Endings LDN Limited | Hospitality | 2014 |
| Harbour 8 Group Ltd | Financial services | 2025 |
| Harmony Homes Supportive Living Ltd | Health & social care | 2024 |
| Harris Property Services Ltd | Construction | 2017 |
| Harrislee Electrical Ltd | Construction | 2021 |
| Harrisons Business Recovery & Insolvency (London) Limited | Administrative & support | 2011 |
| Harry Homes Limited | Real estate | 2025 |
| Hart Plant Ltd | Administrative & support | 2026 |
| Hartfair Limited | Professional & scientific | 2010 |
| Harveys Catering Limited | Hospitality | 2025 |
| Hatch Talent Group Ltd | Administrative & support | 2025 |
| Hatz Holdings Ltd | Real estate | 2022 |
| Haven Contractors Limited | Construction | 2025 |
| Havewegot.Com Ltd | Manufacturing | 2014 |
| Havilah Healthcare Ltd | Health & social care | 2019 |
| Havilah Properties Ltd | Real estate | 2020 |
| Hawarden Technology Centre Ltd | Real estate | 2022 |
| Hawkins Militaria & Collectables Ltd | Wholesale & retail | 2025 |
| Hawkley Meade Management Company Limited | Households | 2003 |
| Hayes Automotive Ltd | Wholesale & retail | 2026 |
| Haywards Heating Ltd | Construction | 2018 |
| Haywards Property Solutions Ltd | Real estate | 2022 |
| Haze Creative Studio Ltd | Professional & scientific | 2025 |
| HB Fight Gear Limited | Wholesale & retail | 2021 |
| Heal to Heel Limited | Other services | 2024 |
| Health & Safety Compliance Partnership Limited | Professional & scientific | 2009 |
| Health-Spa Water Limited | Administrative & support | 1987 |
| Heatafloor Limited | Wholesale & retail | 2024 |
| Heath Administration Limited | Administrative & support | 2011 |