| Green Eden Healthcare Limited | Health & social care | 2023 |
| Green Farm Butchery Limited | Wholesale & retail | 2007 |
| Green Shape Maintenance Ltd | Administrative & support | 2021 |
| Green White Homes Ltd | Real estate | 2026 |
| Green World Filters Ltd | Manufacturing | 2025 |
| Greenbrook Industries Limited | Manufacturing | 1988 |
| Greenlight Property Consultants Limited | Real estate | 2011 |
| Greenline(Environmental) Ltd. | Water & waste | 2011 |
| Greenpassionlandscapes Ltd | Administrative & support | 2026 |
| Greenstead Realty Ltd | Real estate | 2024 |
| Greenvilla Care Ltd | Health & social care | 2024 |
| Greenwood and Negus Boxing and Fitness Ltd | Arts & recreation | 2024 |
| Gregg Bennett Ltd | Construction | 2025 |
| Gregory-Dean Developments Ltd | Construction | 2012 |
| Gremlin Ltd | Information & communication | 2003 |
| Grendale Limited | Real estate | 2024 |
| Grey Line Transport Ltd | Administrative & support | 2025 |
| Gridline Precise Limited | Construction | 2007 |
| Grieving Friends Support Network Ltd | Health & social care | 2024 |
| Griffin Cafe Limited | Hospitality | 2020 |
| Griffin Gaming Limited | Wholesale & retail | 2023 |
| Griffiths Legal Limited | Professional & scientific | 2026 |
| GRK Properties Limited | Real estate | 2002 |
| Grosvenor Court Residents Management Company Limited | Households | 2003 |
| Groundhopr Ltd | Arts & recreation | 2025 |
| Grove Leaseholders Limited | Real estate | 2013 |
| Grove Lofts Management Company Limited | Households | 2002 |
| Groves Autos Limited | Wholesale & retail | 2008 |
| Grovetown Services Limited | Professional & scientific | 2020 |
| Growth Brothers Ltd | Information & communication | 2022 |
| GS Express Logistics Ltd | Transport & logistics | 2024 |
| GSG Polisher Ltd | Construction | 2017 |
| GSS Solutions Ltd | Administrative & support | 2022 |
| GSV Drylining Ltd | Construction | 2020 |
| GSY Building Maintenance Ltd | Construction | 2022 |
| GT Cabling Ltd | Construction | 2019 |
| GT Construction Services Ltd | Construction | 2025 |
| GT Creams Ltd | Wholesale & retail | 2024 |
| Gtsp Limited | Information & communication | 2015 |
| Guadrelle Ltd | Administrative & support | 2016 |
| Guaranty Services Limited | Administrative & support | 2017 |
| Guardwise Security Limited | Administrative & support | 2026 |
| Guerlyn Limited | Wholesale & retail | 2024 |
| Guess Fiber Ltd | Construction | 2025 |
| Guide IT Limited | Wholesale & retail | 2014 |
| Guildbro Roofing Ltd | Construction | 2025 |
| GUL Logistics Ltd | Transport & logistics | 2020 |
| Gunter Veterinary Services Ltd | Professional & scientific | 2024 |
| Gurnav Transport Ltd | Transport & logistics | 2026 |
| Gurnell Grove Management Company Limited | Households | 2018 |
| Gurv Limited | Real estate | 1994 |
| GUS Medical Services Limited | Health & social care | 2020 |
| GVS Carpentry Limited | Manufacturing | 2023 |
| GW Auto Cars Limited | Wholesale & retail | 2025 |
| GW Grab Services Limited | Transport & logistics | 2005 |
| GW Public Relations Limited | Administrative & support | 2007 |
| Gxpeople Ltd | Administrative & support | 2015 |
| Gym Tours AI Ltd | Information & communication | 2025 |
| GZM Capital Investments Limited | Financial services | 2024 |
| H & C Plus Limited | Professional & scientific | 2017 |
| H & H Shelters Limited | Real estate | 2025 |
| H & J Mortgage Services Ltd | Financial services | 2018 |
| H & J Property Solutions Ltd | Households | 2018 |
| H G Evans Garage Limited | Wholesale & retail | 2014 |
| H J Kabir Limited | Wholesale & retail | 2021 |
| H Solak Ltd | Transport & logistics | 2026 |
| H Tinney Farming Limited | Agriculture & fishing | 2022 |
| H Tinney Ltd | Real estate | 2019 |
| H&E Harlow Limited | Real estate | 2013 |
| H&H ALI Trading Limited | Wholesale & retail | 2024 |
| H&K Structural Engineers Limited | Professional & scientific | 2021 |
| H&S Engineering Construction Ltd | Professional & scientific | 2023 |
| H&W Collection Limited | Manufacturing | 2018 |
| H.A Medical Services (UK) Limited | Health & social care | 2016 |
| H.D. & R.D.Electrical & Mechanical Engineers Limited | Construction | 1972 |
| H.Mike Tiling Limited | Construction | 2017 |
| H@Me Events Limited | Hospitality | 2008 |
| Habasllari Limited | Wholesale & retail | 2026 |
| Hadleigh Healthcare Ltd | Health & social care | 2020 |
| Hadley Grange (Residents) Management Limited | Professional & scientific | 1993 |
| Hadley Lloyd Ltd | Administrative & support | 2015 |
| Hagi Express Ltd | Transport & logistics | 2025 |
| HAI Ying Limited | Real estate | 2020 |
| Hair & Image Limited | Other services | 2023 |
| Hair Space Salon Harlow Ltd | Other services | 2026 |
| Hair Styled by MEG Ltd | Wholesale & retail | 2024 |
| HAIRBYNATS19 Ltd | Other services | 2022 |
| Haitches & Siya T/A BAE Miami Limited | Wholesale & retail | 2023 |
| Hakamama Consulting Limited | Professional & scientific | 2025 |
| Hakamama Ltd | Professional & scientific | 2017 |
| Hala Diamonds Ltd | Wholesale & retail | 2023 |
| Halcyon Consults Limited | Health & social care | 2023 |
| Halford Road NO 19 Limited | Households | 2009 |
| Hallams (Electrical Contractors) Limited | Professional & scientific | 1946 |
| Hallcrest Maintenance Limited | Construction | 2021 |
| Hallmark Glass & Glazing Limited | Construction | 2009 |
| Halzee Estates Limited | Real estate | 2026 |
| Hammer & Tongue Limited | Information & communication | 2018 |
| Hammond & Smith Bishop's Stortford Ltd | Real estate | 2025 |
| Hammond Logistics Limited | Real estate | 2018 |