| Golden Rustic Deli Limited | Wholesale & retail | 2013 |
| Goldenace Properties Limited | Real estate | 2018 |
| Goodrich Sports Consulting Limited | Professional & scientific | 2019 |
| Grace Fagan Limited | Health & social care | 2025 |
| Grantsports Ltd | Other services | 2018 |
| Green Deals Solutions Ltd | Hospitality | 2021 |
| Green Retail Stratford Limited | Wholesale & retail | 2022 |
| Green Retail White City Limited | Wholesale & retail | 2022 |
| Green SET Construction Limited | Construction | 2009 |
| Greenspace Gardens Limited | Administrative & support | 2009 |
| Griffon Realty Limited | Real estate | 2017 |
| Grub House Ltd | Hospitality | 2019 |
| Gtsam Ltd | Transport & logistics | 2016 |
| H & J EV Solutions Ltd | Construction | 2021 |
| H & M International Commodities Limited | Wholesale & retail | 2020 |
| Hanala Holdings Limited | Financial services | 2022 |
| Hannah Ambali Ltd | Wholesale & retail | 2024 |
| Hashtagme.Online Ltd | Professional & scientific | 2018 |
| Hassan Homes Ltd | Construction | 2025 |
| Hassco Developments Limited | Construction | 2017 |
| Hassco Group Limited | Financial services | 2017 |
| Hatch Studio London Ltd | Professional & scientific | 2024 |
| Haven Coffee Limited | Hospitality | 2019 |
| Haywards House Flat Management Company Limited | Households | 2000 |
| Headway Support Homes Limited | Health & social care | 2019 |
| Healthy Hospitality Ltd | Health & social care | 2022 |
| Hearts MOT Limited | Wholesale & retail | 2018 |
| Helix Asset Management Limited | Financial services | 2014 |
| Henley Electricals Ltd | Construction | 2016 |
| HH Highlands Limited | Real estate | 2018 |
| Himalayan Highland Summer Exhibitions Limited | Wholesale & retail | 2004 |
| Hirenetwork Global Ltd | Administrative & support | 2025 |
| Holi Aroma Ltd | Wholesale & retail | 2019 |
| Holistic Health and Wellness Circle Ltd | Health & social care | 2018 |
| Holy Habits Ltd | Manufacturing | 2022 |
| Holy Pitta Limited | Hospitality | 2017 |
| Home Made Community Café C.I.C. | Manufacturing | 2013 |
| Home Touch Building Contractors Limited | Construction | 2022 |
| Homes at Last Ltd | Real estate | 2025 |
| Honey Management Consultancy Ltd | Professional & scientific | 2023 |
| Honeybel Estates Limited | Real estate | 2003 |
| Hoque Halal Meat Limited | Wholesale & retail | 2020 |
| HSA Group of Companies Ltd | Financial services | 2021 |
| HSA Specs Limited | Wholesale & retail | 2022 |
| HSA Transportation Ltd | Transport & logistics | 2022 |
| HUD Limited | Real estate | 2007 |
| Huda Homes Limited | Real estate | 2025 |
| Hunter Court Limited | Administrative & support | 2016 |
| Hydrostatica Ltd | Professional & scientific | 2019 |
| Hyperdis Properties Ltd | Real estate | 2023 |
| Hypnoscience Limited | Health & social care | 2005 |
| Hypotek Capital Limited | Financial services | 2021 |
| Hypotek Financeco 2 Limited | Financial services | 2023 |
| I-Kuan TAO United Kingdom-Hq | Other services | 1998 |
| I.B. Electrical (London) Limited | Construction | 2011 |
| Iactive.Me Limited | Other services | 2019 |
| IAN Drury Associates Ltd | Professional & scientific | 2025 |
| Iberica Design Limited | Manufacturing | 2026 |
| Ice Polar Foods Limited | Manufacturing | 2022 |
| Iconic Talent LLP | | 2019 |
| Icpap Ltd | Education | 2018 |
| IG Invest UK Limited | Financial services | 2021 |
| Iiman Limited | Hospitality | 2019 |
| In-Eight Entertainment Limited | Information & communication | 2019 |
| Incredible Music Entertainment Limited | Information & communication | 2009 |
| India Bravo Ltd | Administrative & support | 2023 |
| Indie Investments Limited | Real estate | 2018 |
| Inhand Limited | Other services | 2021 |
| Instasoft Academics & IT Solutions Limited | Information & communication | 2025 |
| INX Trading Ltd | Wholesale & retail | 2025 |
| Istanbul Fabrics Ltd | Wholesale & retail | 2018 |
| IT Takes a Village Collective Ltd | Information & communication | 2023 |
| Iwired Professional Services Limited | Transport & logistics | 2019 |
| J2O Property Management Ltd | Households | 2025 |
| James Marcus Property Investments Ltd | Real estate | 2022 |
| Jamie Roberton Media Ltd | Information & communication | 2026 |
| Jasmine T Skee Limited | Other services | 2016 |
| JAT Property Limited | Real estate | 2008 |
| JB Crew Enterprise Limited | Financial services | 2024 |
| JB Marine Ltd. | Transport & logistics | 1995 |
| JBS & Co Associates Limited | Information & communication | 2018 |
| JHN Locums Limited | Professional & scientific | 2025 |
| JJI Co Limited | Wholesale & retail | 2005 |
| JKA Yialousa Limited | Real estate | 2020 |
| JOE Mckechnie Consulting Ltd | Professional & scientific | 2024 |
| John Bray Property Services Limited | Real estate | 2013 |
| John Leach Properties Limited | Real estate | 1996 |
| Josh Horus Limited | Arts & recreation | 2020 |
| Josh-Gen International Limited | Administrative & support | 2006 |
| Joterry Limited | Real estate | 2018 |
| Jovinda Ltd | Transport & logistics | 2017 |
| JP Cannon Ltd | Hospitality | 2004 |
| JPS Commodities Limited | Financial services | 2014 |
| JUS Holiday Homes Ltd | Hospitality | 2019 |
| Just Gifted Ltd | Manufacturing | 2016 |
| K Hayat Construction Limited | Construction | 2023 |
| K.S.R Developments Limited | Construction | 2024 |
| Kally Ellis Limited | Wholesale & retail | 1998 |
| Kame Consultancy Limited | Professional & scientific | 2019 |
| Kamfit Coaching Ltd | Health & social care | 2025 |