| Goodsouls Collective Ltd | Information & communication | 2025 |
| Gooinara Ltd | Hospitality | 2023 |
| GR Real Estate Ltd | Real estate | 2021 |
| Graeme Maisey Limited | Professional & scientific | 2008 |
| Graphica Display Group Ltd | Manufacturing | 2025 |
| Graphica Holdings Limited | Financial services | 2026 |
| Grava Limited | Administrative & support | 2025 |
| Grayston Engineering Limited | Manufacturing | 1978 |
| Green Cleen (Surrey 2020) Limited | Administrative & support | 2020 |
| Greenhill 2003 Ltd | Professional & scientific | 2003 |
| Greenlane Auto Car Spares Ltd | Wholesale & retail | 2024 |
| Greenlane Management Company Limited | Households | 1982 |
| Greyroofs Surbiton Limited | Households | 2010 |
| Grilo Estates Ltd | Real estate | 2023 |
| GS Immigration Law Consultancy Ltd | Professional & scientific | 2025 |
| Guild of Project Controls Limited | Other services | 2014 |
| H & M Surrey Limited | Administrative & support | 2016 |
| H. J. Golding & Co. Ltd. | Construction | 2001 |
| H.F.M. Lighting and Sound Ltd | Professional & scientific | 1998 |
| H.M.D. (UK) Ltd. | Wholesale & retail | 2003 |
| H.Q. Lacquer Limited | Manufacturing | 1995 |
| Hadrianeia Consultancy Services Ltd | Information & communication | 2017 |
| Hair IS Everything Ltd | Other services | 2025 |
| Halford Court Residents Association Limited | Households | 1970 |
| Halo Home Protect Ltd | Construction | 2026 |
| Hamilton Court Limited | Households | 1996 |
| Hammer Medical Bidco Limited | Other services | 2024 |
| Hammersmith Grove 26 Ltd | Real estate | 2026 |
| Hampton Corporate Services Ltd | Real estate | 2001 |
| Hampton Data Services Limited | Information & communication | 1992 |
| Hanberry Consulting Ltd | Professional & scientific | 2022 |
| Handrail and Staircase Consultants Limited | Construction | 2018 |
| Hangang Trading Ltd | Wholesale & retail | 2009 |
| Hankook International Motors Limited | Wholesale & retail | 1998 |
| Hanmi Gallery Limited | Wholesale & retail | 2010 |
| Hann Made by Lesley Ltd | Manufacturing | 2021 |
| Hantech UK Ltd | Wholesale & retail | 2012 |
| Harbans LAL Kakkar&Sons Ltd | Real estate | 2022 |
| Harris Court Management Limited | Administrative & support | 2014 |
| Hart of London Ltd | Wholesale & retail | 2022 |
| Harv C & J Ltd | Manufacturing | 2025 |
| Hastains Special Maintenance Works and Building Development Limited | Construction | 1980 |
| Hauxley Tech Ltd | Professional & scientific | 2018 |
| Hawk Recruitment Solutions Limited | Administrative & support | 2024 |
| Hayats Consulting Limited | Professional & scientific | 2014 |
| Hayats Wholesale Limited | Wholesale & retail | 2023 |
| Heartwood London Ltd | Construction | 2022 |
| Heathrow Van Centre Limited | Wholesale & retail | 2013 |
| Heavenly Encounters Ltd | Other services | 2025 |
| Hebden Bridge Property Limited | Real estate | 2017 |
| Heritage Refurbishments Ltd | Administrative & support | 2019 |
| Heron Court Residents Association Limited | Households | 1999 |
| Hesco (South East) Ltd | Information & communication | 2020 |
| Hfuk Giving Ltd | Wholesale & retail | 2025 |
| HHD 16 Coln Ltd | Real estate | 2025 |
| Hickman Building Ltd | Construction | 2025 |
| High Secure Ltd | Administrative & support | 2024 |
| High-Tech IT Limited | Information & communication | 2012 |
| Highpoint Management Consulting Limited | Professional & scientific | 2019 |
| Hikepath Ltd | Wholesale & retail | 2022 |
| Hilda Court Maintenance Company Limited | Households | 1962 |
| Hilka Tools (UK) Holding Limited | Financial services | 2025 |
| Hilka Tools (UK) Limited | Manufacturing | 1982 |
| Hive Work Ltd | Construction | 2019 |
| Holtlodge Limited | Households | 1985 |
| Home Time Maintenance Ltd | Construction | 2023 |
| Homeglory Limited | Construction | 1984 |
| Homemead Construction Ltd | Construction | 2012 |
| Homeovitality Company Limited | Professional & scientific | 2010 |
| Homesafe Glazing and Locks Ltd | Construction | 2019 |
| Hook Cafe & Bakery Ltd | Hospitality | 2021 |
| Hook Swim School and Aqua Centre Limited | Education | 2005 |
| Hooklands and Heather Courts Residents' Association, Limited | Households | 1968 |
| Horstead Hunt Ltd | Real estate | 2019 |
| House of 786 Limited | Wholesale & retail | 2025 |
| Howard Elite Training Ltd | Education | 2025 |
| HP Architects Limited | Professional & scientific | 2013 |
| HSE MEP Design Ltd | Professional & scientific | 2025 |
| Hsnj Ltd | Real estate | 2020 |
| Hudsons DRY Cleaners Limited | Other services | 2015 |
| HUI Property Ltd | Real estate | 2019 |
| Humanity First UK | Health & social care | 2018 |
| Hungary 4 U Ltd | Administrative & support | 2012 |
| Hunt Promotions Limited | Arts & recreation | 2015 |
| Hussain Investment Group (UK) Ltd | Financial services | 2021 |
| Hyams Wardrobes Limited | Construction | 2018 |
| Hyperia AI Limited | Information & communication | 2025 |
| Hyunji Ltd | Wholesale & retail | 2017 |
| I J Beim & Associates Limited | Administrative & support | 2015 |
| I'M OK, You'Re OK, We'Re OK Ltd | Information & communication | 2025 |
| IBA Home Ltd | Wholesale & retail | 2025 |
| IC Impact Consulting Ltd | Administrative & support | 2020 |
| ICC Security Company Limited | Administrative & support | 2012 |
| Idmiston (Management) Limited | Households | 1980 |
| Ignition MKT Limited | Professional & scientific | 2025 |
| Ikkar London Ltd | Other services | 2018 |
| IMD Contractor Ltd | Construction | 2019 |
| Impact Core Fitness Ltd | Wholesale & retail | 2025 |
| IN Medias RES (Holdings) Limited | Manufacturing | 2024 |
| Ince Corporate Financial Advisory Services Ltd | Real estate | 2024 |