| Gombo Assets 3 Ltd | Construction | 2021 |
| Gombo Assets 4 Limited | Hospitality | 2023 |
| Goss Maritime Ltd | Professional & scientific | 2017 |
| Goulden Investments Limited | Real estate | 2015 |
| Graham Coleman Limited | Transport & logistics | 2012 |
| Grateful Today Limited | Information & communication | 2023 |
| Gravity 9.81 Limited | Other services | 2021 |
| Green Door Capital Limited | Real estate | 2015 |
| Greenheath Construction Management Limited | Construction | 2024 |
| Greenwood Care Plus Ltd | Health & social care | 2022 |
| Gresham Close Management Company Limited | Households | 1994 |
| Gresham RD Limited | Construction | 2018 |
| Greti Everest Ltd | Professional & scientific | 2021 |
| Greywood Digital Ltd | Professional & scientific | 2018 |
| Ground Property Freeholds Ltd | Real estate | 2022 |
| Ground Property Ltd | Construction | 2019 |
| Grow Advisory Ltd | Professional & scientific | 2025 |
| Gryllus Holdings Limited | Professional & scientific | 2017 |
| Gryllus Housing Limited | Real estate | 2019 |
| Gryllus Property Limited | Real estate | 2017 |
| Guards Automotive Limited | Wholesale & retail | 2011 |
| Guards Homes Limited | Real estate | 2020 |
| H.C. Contracts Ltd | Construction | 2015 |
| H20 Plumbing Limited | Construction | 2006 |
| Hailsham Group Ltd | Construction | 2023 |
| Hairstory Products UK Limited | Wholesale & retail | 2018 |
| Hamilton Rowe Recruitment Services Ltd | Administrative & support | 2022 |
| Handydeco Ltd | Construction | 2015 |
| Happy Days Porth Ltd | Real estate | 2024 |
| Happy Pace Ltd | Education | 2024 |
| Harbour & Hive Limited | Information & communication | 2025 |
| Hariaksh Limited | Wholesale & retail | 2024 |
| Harker Benham Limited | Information & communication | 2018 |
| Harley Street Doctors Limited | Professional & scientific | 1993 |
| Harlington Green Limited | Real estate | 2001 |
| Harris Global Holdings Ltd | Administrative & support | 2017 |
| Harris Global Ltd | Administrative & support | 2010 |
| Hatch Autos Ltd | Wholesale & retail | 2019 |
| Hazlo Financial Services Limited | Financial services | 2025 |
| Hazlo Limited | Professional & scientific | 2019 |
| Headstream 4 Limited | Administrative & support | 2011 |
| Health by Howe Ltd. | Arts & recreation | 2013 |
| Health for Living Community Interest Company | Professional & scientific | 2024 |
| Heart Dental Recruitment Ltd | Administrative & support | 2023 |
| Heart Felt Bloom Ltd | Administrative & support | 2023 |
| Hedley Investments Limited | Construction | 1938 |
| Hedone Hospitality Ltd | Professional & scientific | 2021 |
| Heimdall International Risk Management Ltd | Information & communication | 2023 |
| Helm Business Planning Limited | Professional & scientific | 2010 |
| Helm Recruitment Limited | Administrative & support | 2002 |
| Helpful Digital Limited | Information & communication | 2016 |
| Helpful Simulator Ltd | Professional & scientific | 2021 |
| Helpful Technology Limited | Information & communication | 2010 |
| Hengrove Green Limited | Real estate | 2001 |
| Henry Streeter (Automotive) Limited | Real estate | 1963 |
| Henry Streeter (Finance) Limited | Administrative & support | 1971 |
| Henry Streeter (Sand & Ballast) Limited | Mining & quarrying | 1955 |
| Henry Streeter (Sunbury) Limited | Real estate | 1959 |
| Henry Streeter (Transport) Limited | Transport & logistics | 1953 |
| Henry Streeter Limited | Professional & scientific | 1967 |
| Henry Streeter Securities International Limited | Administrative & support | 1972 |
| Heritage Construction & Paving Limited | Construction | 2016 |
| Hever Construction Ltd | Construction | 2010 |
| Hever Health Ltd | Health & social care | 2018 |
| Hexagon Print Limited | Manufacturing | 2007 |
| Hexatek Solutions Ltd | Information & communication | 2025 |
| High Ridge Investments Ltd | Financial services | 2008 |
| Highacre Homes Limited | Real estate | 2021 |
| Highland Collections Ltd | Wholesale & retail | 2019 |
| Hillcrest Freehold Management Limited | Households | 2014 |
| Hills Sparkling Pools Ltd | Professional & scientific | 2018 |
| Hippo Productions Ltd | Administrative & support | 2010 |
| HIS N Hers Gardeners Limited | Administrative & support | 2016 |
| HL Finance Limited | Professional & scientific | 2020 |
| Hodroyd Hall Estate Ltd | Hospitality | 2017 |
| Holmegaard Ltd | Real estate | 2018 |
| Holroyd and Sons Limited | Manufacturing | 2024 |
| Home Counties Furniture Wholesale Ltd | Wholesale & retail | 2026 |
| Home Golf Limited | Construction | 2025 |
| Homecroft Financial Management Limited | Financial services | 1997 |
| Honeystone Accounting Limited | Professional & scientific | 2018 |
| Honeystone Property Limited | Real estate | 2022 |
| Hot Sand Property Ltd | Real estate | 2026 |
| Hotter Homes Ltd | Construction | 2012 |
| Houat Invest Ltd | Professional & scientific | 2019 |
| Howard House (Brighton) Limited | Construction | 2026 |
| HP Porsche Ltd | Wholesale & retail | 2017 |
| Huely Limited | Professional & scientific | 2017 |
| Humancorps Ltd | Professional & scientific | 2023 |
| Hunterbelgo Limited | Real estate | 2025 |
| Hurricane JIM Productions Limited | Information & communication | 2007 |
| Huxley Surveyors & Valuers Limited | Professional & scientific | 2023 |
| Huxley Surveyors Limited | Professional & scientific | 2020 |
| Huyton Bathrooms Ltd | Professional & scientific | 2026 |
| Hydrosure Compliance Limited | Professional & scientific | 2026 |
| I:Am Salons Limited | Other services | 2016 |
| Iced Gems Events & Parties Limited | Education | 2014 |
| Iceworxz Consulting Limited | Information & communication | 2012 |
| Icon Limited | Administrative & support | 1996 |
| Iconic Agency Ltd. | Administrative & support | 2014 |