| Go West Self-Drive Ltd | Administrative & support | 2025 |
| Going Live in 5 Ltd | Information & communication | 2024 |
| Golden Ears Audiology Clinic Limited | Health & social care | 2016 |
| Golden Touch Care Services Ltd | Health & social care | 2026 |
| Goldstar Aviation Ltd | Transport & logistics | 2022 |
| Goodall AVE Ltd | Health & social care | 2023 |
| Gorkhas Force Ltd | Administrative & support | 2021 |
| Gorkhas Property Ltd Limited | Real estate | 2025 |
| Gouldy's Groundworks Ltd | Construction | 2019 |
| GPA Europe Limited | Other services | 2012 |
| Grace Gardens RTM Company Ltd | Households | 2008 |
| Graeche UK Ltd. | Information & communication | 2013 |
| Grants Tackle UP Ltd | Wholesale & retail | 2022 |
| Grassthetics Ltd | Administrative & support | 2025 |
| Gravity Private Finance Limited | Professional & scientific | 2006 |
| Graykin Estates Limited | Professional & scientific | 2019 |
| Grayston Technology Ltd | Information & communication | 2024 |
| Graze Panda Ltd | Hospitality | 2025 |
| Great Gaming Limited | Information & communication | 2019 |
| Grebe Consulting Ltd | Professional & scientific | 2023 |
| Green Basket Limited | Hospitality | 2016 |
| Green Day Consulting Ltd | Professional & scientific | 2022 |
| Green Drycleaners Ltd | Other services | 2012 |
| Green Tomatoes Ltd | Hospitality | 2011 |
| Greenbee Gardening Ltd | Administrative & support | 2013 |
| Greenboxx Renewables Ltd | Construction | 2026 |
| Gregory Martin International Limited | Administrative & support | 1988 |
| Gridcore Power Limited | Construction | 2015 |
| Griffiths & Co Developments Ltd | Real estate | 2022 |
| Grosvenor Capital Management Ltd | Hospitality | 2012 |
| Grosvenor Court (Anerley Hill) Limited | Real estate | 1966 |
| Grosvenor Residence Limited | Hospitality | 2011 |
| Grove Apartments Management Limited | Households | 2007 |
| Grover Productions Limited | Information & communication | 2026 |
| Growth Constructors Ltd | Professional & scientific | 2025 |
| GSA Company Holdings Limited | Construction | 2018 |
| GT FOX Security Limited | Administrative & support | 2025 |
| GU Plumbing & Heating Services Ltd | Construction | 2017 |
| Gulliver Marketing Ltd | Professional & scientific | 2015 |
| GUY Shattock Associates Limited | Construction | 1999 |
| Gym Factory Beverley Limited | Arts & recreation | 2025 |
| H J Roelofs (Egham) Ltd. | Financial services | 2010 |
| H P Surveys Ltd | Professional & scientific | 2011 |
| H.A.C.S. Air Conditioning Ltd | Construction | 2023 |
| H23 Limited | Information & communication | 2019 |
| H2JOEPLUMBING Ltd | Construction | 2021 |
| Haar Associates Limited | Professional & scientific | 2007 |
| Haar Holdings Limited | Professional & scientific | 2019 |
| Haauuss Land and Properties Limited | Manufacturing | 2020 |
| HAB Consultants Ltd | Professional & scientific | 2022 |
| Habby and Co Limited | Other services | 2020 |
| Hailinit ED Ltd | Information & communication | 2021 |
| Hair by Heidi Limited | Other services | 2015 |
| Hair Studio 17 Ltd | Other services | 2024 |
| Hala (Farnborough) Limited | Hospitality | 1997 |
| Hall Property (London) Limited | Real estate | 2021 |
| Hall Yacht Consulting Limited | Professional & scientific | 2019 |
| Hall YC Holdings Limited | Financial services | 2024 |
| Hamments Health and Safety Limited | Professional & scientific | 2013 |
| Hanco Consultants Ltd | Professional & scientific | 2015 |
| Hancocks Farm Limited | Agriculture & fishing | 2003 |
| Handy Accounting Services Ltd. | Professional & scientific | 2022 |
| Handy Dance Training Ltd | Arts & recreation | 2025 |
| Hannay & Co Limited | Professional & scientific | 2010 |
| Hansford Financial Solutions Ltd | Financial services | 2025 |
| Hapi Nutrition UK Limited | Information & communication | 2015 |
| Hapisource UK Limited | Wholesale & retail | 2014 |
| Hargon Holdings Limited | Professional & scientific | 2023 |
| Harley Street Knee Clinic LLP | | 2012 |
| Harrad Property Services Limited | Real estate | 2010 |
| Harricon Events Limited | Administrative & support | 2022 |
| Harridges Ltd | Arts & recreation | 2016 |
| Harrington Digital Ltd | Professional & scientific | 2026 |
| Harrington West Properties Limited | Real estate | 2021 |
| Hart Cars Ltd | Professional & scientific | 2004 |
| Hart Family Law Ltd | Professional & scientific | 2020 |
| Hart Hkers FC CIC | Education | 2024 |
| Hart Housing Property Management Company Limited | Real estate | 2021 |
| Hart Peri Peri Limited | Hospitality | 2020 |
| Hart Phone Box Ltd | Wholesale & retail | 2015 |
| Hart Securus Ltd | Financial services | 2015 |
| Hart Voluntary Action Limited | Other services | 2006 |
| Hart Windows and Glazing Limited | Construction | 2012 |
| Hashka Limited | Information & communication | 2024 |
| Haslett Avenue East (Crawley) Management Company Limited | Households | 2006 |
| Havan Nails Ltd | Other services | 2025 |
| Havenstone Housing CIC | Real estate | 2025 |
| Hawk EYE Pizza Limited | Hospitality | 2011 |
| Hawshier Limited | Wholesale & retail | 2004 |
| HCB Limited | Information & communication | 2018 |
| HCL Operations Ltd | Professional & scientific | 2014 |
| Hearing and Balance Limited | Health & social care | 2026 |
| Heathfield Court (Fleet) Residents Association Limited | Households | 1965 |
| Hellia Limited | Information & communication | 2012 |
| Hello Renewables Ltd | Construction | 2020 |
| Hemisphere Gifts Ltd | Wholesale & retail | 2019 |
| Henke Financial Services Ltd | Professional & scientific | 2016 |
| Henkirst Properties Limited | Real estate | 2024 |
| Henkirst Property Maintenance Limited | Real estate | 2023 |
| Herballea Healing From the Meadow Ltd | Health & social care | 2025 |