| Freelance Asset Management Ltd | Administrative & support | 2017 |
| French Court (Chelmsford) Ltd | Households | 2023 |
| Frost Holdings (London) Ltd | Financial services | 2016 |
| Funk of the Monk Ltd | Arts & recreation | 2019 |
| Futura Contracts Limited | Wholesale & retail | 1991 |
| Future Smart Electrical & Renewables Ltd | Other services | 2022 |
| FVB International Limited | Professional & scientific | 2018 |
| FW Work Limited | Administrative & support | 2024 |
| G & M Building Foundations Ltd | Construction | 2004 |
| G MAX Holdings Ltd | Financial services | 2026 |
| G Pope & Associates Ltd | Professional & scientific | 2013 |
| G.A. Prestige Limited | Construction | 2003 |
| G.S. Gangar Ltd | Professional & scientific | 2003 |
| Gaffer App Limited | Information & communication | 2019 |
| Gailes Holding UK Limited | Wholesale & retail | 2021 |
| Gamart Engineering Limited | Manufacturing | 2003 |
| Gamart Fabrications Ltd | Professional & scientific | 2021 |
| Garfield Property Limited | Real estate | 2021 |
| Garisan Ltd | Real estate | 2017 |
| GAS and Heating Limited | Construction | 2009 |
| Gautama Limited | Professional & scientific | 2018 |
| Gaymer Limited | Agriculture & fishing | 2010 |
| Gaymer Properties LLP | | 2009 |
| Gazelle Book Services Limited | Wholesale & retail | 1987 |
| GBE Financial Services Ltd | Professional & scientific | 2016 |
| GDL-1 Limited | Financial services | 2013 |
| Genevieve Edwards Medical Aesthetics Ltd | Health & social care | 2021 |
| Geniusto (UK) Ltd | Information & communication | 2020 |
| Gestral Limited | Information & communication | 2013 |
| Giosec UK Limited | Information & communication | 2008 |
| GJM Consultancy Limited | Arts & recreation | 2023 |
| GL Property Investments Limited | Real estate | 2019 |
| GLK Productions Limited | Information & communication | 2023 |
| Global Electronics Limited | Professional & scientific | 1995 |
| Goatsmoor Lodge Ltd | Agriculture & fishing | 2025 |
| Gotham Impressions Limited | Administrative & support | 1964 |
| Grace Monica Wickham Ltd | Extraterritorial | 2025 |
| Grange Homes & Developments Limited | Construction | 2022 |
| Grangebrook Estates Limited | Real estate | 1986 |
| Grangewood Brentwood Limited | Real estate | 1999 |
| Grayshot Limited | Administrative & support | 1991 |
| Greenacres International Ltd | Financial services | 2020 |
| Greenfields Family Investment Company Limited | Financial services | 2012 |
| Greensteds Tree Surgery Limited | Agriculture & fishing | 2022 |
| Grimstead Stainless & Vent Ltd | Manufacturing | 2016 |
| Grow Entertainment Limited | Professional & scientific | 2002 |
| GRP Roofing Contractors Limited | Construction | 2016 |
| Gryphon Surveys Ltd | Professional & scientific | 1988 |
| Guard TEC Security Limited | Administrative & support | 2005 |
| Guiler Group Holdings Ltd | Financial services | 2020 |
| Guiler Properties Ltd | Real estate | 2023 |
| Guiler Property LLP | | 2023 |
| Gunnervito Limited | Professional & scientific | 2017 |
| GW Contracts Ltd | Construction | 2024 |
| H E Upton Contracting Ltd | Agriculture & fishing | 2026 |
| H SQUARED2 Limited | Construction | 2017 |
| H&E Real Estate Ltd | Real estate | 2020 |
| H&F Property Holdings Ltd | Real estate | 2025 |
| Hadleigh Property Holdings Ltd | Financial services | 2019 |
| Haines Roofing Ltd | Construction | 2025 |
| Hair @ 39 Limited | Other services | 2017 |
| Haircut Club Limited | Other services | 2025 |
| Handmade Speciality Products Limited | Manufacturing | 2009 |
| Hann Trustees Limited | Financial services | 2024 |
| Hanviojam Limited | Wholesale & retail | 2023 |
| Harklinikken UK Limited | Wholesale & retail | 2022 |
| Harpon Limited | Financial services | 2016 |
| Hart Wealth Management Limited | Other services | 2020 |
| Hartnell Estates Limited | Construction | 1961 |
| Hartnell Residential Ltd | Construction | 1974 |
| Hatch Roofing Services Limited | Construction | 2013 |
| Havering Carriage Company Limited | Transport & logistics | 1997 |
| Havering Carriage Leasing Limited | Real estate | 2007 |
| Havilah Solutions Ltd | Professional & scientific | 2006 |
| HBS Building Group Ltd | Financial services | 2024 |
| HBS Holdings (SE) Ltd | Financial services | 2015 |
| HDG Consulting Limited | Professional & scientific | 2011 |
| Healthcare Staff Services Ltd | Health & social care | 2024 |
| Heasmans Limited | Professional & scientific | 2003 |
| Heath Place Properties Limited | Real estate | 2012 |
| Henchley Ltd | Construction | 2014 |
| Henrys Events Ltd | Hospitality | 2012 |
| Henton Kirkman Limited | Real estate | 2016 |
| Hero Marine Limited | Administrative & support | 2016 |
| HH Gyms Ltd | Arts & recreation | 2024 |
| Hi-Deck Scaffolding Limited | Construction | 1998 |
| Hichens Properties Limited | Real estate | 1998 |
| High Pitch Roofing Ltd | Construction | 2022 |
| Hintlesham Care Limited | Administrative & support | 2012 |
| Hippodrome Consulting Ltd | Professional & scientific | 2024 |
| Hlsfm Limited | Financial services | 2004 |
| HN Sustainable Processing Ltd | Water & waste | 2025 |
| Hodges Financial Services Ltd | Financial services | 2018 |
| Hollyside Limited | Professional & scientific | 2020 |
| Holy Grail.Ai Limited | Professional & scientific | 2019 |
| Honest Hounds Limited | Professional & scientific | 2023 |
| Honeywell and Co LP | | 2023 |
| Horse & Groom Warley Ltd | Hospitality | 2024 |
| House & Jackson Equine Hospital Limited | Professional & scientific | 2024 |
| House & Jackson Small Animal Hospital Limited | Professional & scientific | 2024 |