| Hobleuk Ltd | Arts & recreation | 2020 |
| HOF BOM Ltd | Hospitality | 2021 |
| HOF BOM Rocket Ltd | Real estate | 2025 |
| Hogerty Hill Limited | Administrative & support | 2015 |
| Hoggs Security Limited | Administrative & support | 2023 |
| Holdenby Business Services Limited | Professional & scientific | 2010 |
| Holistic Email Academy Ltd | Arts & recreation | 2024 |
| Holistic Email Marketing Ltd | Education | 2013 |
| Holistic Risk Solutions Limited | Professional & scientific | 2002 |
| Holly Oaks Living Limited | Construction | 2023 |
| Holt Estates England Limited | Administrative & support | 2017 |
| Holthurst Limited | Construction | 1986 |
| Home Build 2000 Limited | Other services | 1992 |
| Home Improvement Growth Ltd | Professional & scientific | 2024 |
| Home Inventories Limited | Real estate | 2006 |
| Homer AC Limited | Professional & scientific | 2015 |
| Homer Property Ltd | Other services | 2018 |
| Hope & Data Limited | Information & communication | 2025 |
| Hope Barbers (Surrey) Ltd | Other services | 2022 |
| Horizon Energy Acquisition Limited | Administrative & support | 2019 |
| Horizon Energy Partners Limited | Professional & scientific | 2014 |
| Horizon International Global Solutions Limited | Financial services | 2013 |
| Horley Piscatorial Society Limited | Arts & recreation | 2024 |
| Horse Meat Disco Ltd | Wholesale & retail | 2023 |
| Horsfall Education Ltd | Education | 2017 |
| Horsham Leisure Holdings Limited | Financial services | 2014 |
| Horsham Leisure Limited | Arts & recreation | 2007 |
| Horsham Management Co One Ltd | Other services | 2022 |
| Horsham Management Co Two Ltd | Other services | 2022 |
| Host. Property Management Ltd | Real estate | 2026 |
| Hot Nails (UK) Limited | Other services | 2012 |
| House Bridge Expert Property Advice Limited | Real estate | 2008 |
| House of Socials Ltd | Professional & scientific | 2024 |
| Howlett Psychology Limited | Health & social care | 2018 |
| Hrrr Limited | Households | 1988 |
| HU United Ltd | Transport & logistics | 2021 |
| Humanising OUR Workplaces Ltd | Professional & scientific | 2025 |
| Huntley Cartwright LLP | | 2024 |
| Huxley Wear Ltd | Wholesale & retail | 2024 |
| Hydrocarbon Search Partners Limited | Administrative & support | 2013 |
| HYG Hub Ltd | Manufacturing | 2023 |
| HZ Audio Ltd | Information & communication | 2019 |
| I AM Home Property Ltd | Real estate | 2018 |
| I.T. Recruitment Services Limited | Information & communication | 2002 |
| IAN Chescoe Decorating Limited | Construction | 2019 |
| IAN Skinner Consulting Limited | Professional & scientific | 1996 |
| Iappz Limited | Information & communication | 2011 |
| Idea Construction Installation and Design Limited | Construction | 2023 |
| Identium Ltd. | Administrative & support | 2018 |
| IFO Advisory Group Limited | Professional & scientific | 2021 |
| IG Residences Limited | Real estate | 2021 |
| Ignis Arca Ltd | Administrative & support | 2025 |
| IJF Plumbing & Heating Ltd | Construction | 2016 |
| IJP Property Limited | Households | 2025 |
| Illya Marketing Ltd | Professional & scientific | 2019 |
| ILM Asset Management Limited | Real estate | 2012 |
| IMB Cleaning & Maintenance Services Limited | Construction | 2007 |
| Immaculate Property Limited | Construction | 2019 |
| Imperial Airways Limited | Transport & logistics | 2013 |
| IN Data WE Trust Ltd | Information & communication | 2022 |
| Infant Sleep Consultants Limited | Other services | 2016 |
| Inkelite Ltd | Wholesale & retail | 2024 |
| Inova Holdings Ltd | Financial services | 2024 |
| Insight Service Limited | Real estate | 1998 |
| Intaso Group Ltd | Financial services | 2022 |
| Intaso Ltd | Administrative & support | 2019 |
| Integral Detailing Limited | Wholesale & retail | 2020 |
| Inter Franchise Limited | Administrative & support | 2007 |
| Interiors Incorporated Ltd | Professional & scientific | 2011 |
| International Sureties Limited | Financial services | 2011 |
| Internet Marketing HQ Ltd | Administrative & support | 2018 |
| Intertransgroup Limited | Transport & logistics | 2020 |
| Intimate Holidays Ltd | Administrative & support | 2014 |
| Intruder Solutions UK Ltd | Administrative & support | 2018 |
| Inverse Limited | Information & communication | 2014 |
| Invest Offgrid Ched Ltd | Real estate | 2025 |
| Invest Offgrid COT Limited | Real estate | 2023 |
| Invest Offgrid Limited | Real estate | 2022 |
| Invest Offgrid LR Limited | Real estate | 2024 |
| Invest Offgrid SD Limited | Real estate | 2023 |
| Investment & Wealth Management Consultants Limited | Professional & scientific | 2012 |
| Iodis Limited | Information & communication | 2022 |
| Iron Heart Consulting Ltd | Information & communication | 2022 |
| Isin Limited | Construction | 2007 |
| Ivens Metering Ltd | Professional & scientific | 2026 |
| J & S Gray Properties Limited | Real estate | 2020 |
| J Davies Electrical Ltd | Construction | 2023 |
| J N Maslen Electrical Ltd | Construction | 2022 |
| J Stride Limited | Construction | 2018 |
| J-Co Electrical Ltd | Construction | 2018 |
| J. J. & SON Cleaning Limited | Administrative & support | 2017 |
| J. J. Browne & SON (Jewellers) Limited | Wholesale & retail | 1960 |
| J.C Moore Building Services Ltd | Construction | 2024 |
| J.G.G Engineering Ltd | Professional & scientific | 2025 |
| J.M.E. Multi-Services LLP | | 2014 |
| J.R Landscapes Ltd | Professional & scientific | 2012 |
| JA Residential Investments Ltd | Real estate | 2025 |
| JAC & Partners Ltd | Construction | 2015 |
| Jade Insurance Consultants Limited | Financial services | 2002 |
| JAM JAR IT Limited | Information & communication | 2009 |