| Hijama Remedy Ltd | Health & social care | 2021 |
| Hillbury Crawley Ltd | Real estate | 2019 |
| Hillcrest Social Club CIC | Hospitality | 2023 |
| Hind Commercial House Ltd | Real estate | 2026 |
| Hippo Fibre Solutions Ltd | Information & communication | 2020 |
| Hireandgo Limited | Administrative & support | 2025 |
| Hits Facilities Management Ltd | Administrative & support | 2018 |
| Hits Fitness Ltd | Arts & recreation | 2023 |
| Hits Holdings Ltd | Financial services | 2025 |
| Hits Properties Ltd | Real estate | 2023 |
| Hivesoft Ltd | Information & communication | 2024 |
| HJM Grab Services Ltd | Transport & logistics | 2014 |
| HM Beauty Studio Ltd | Other services | 2020 |
| Hm-Haqs Limited | Information & communication | 2026 |
| HN06 Limited | Professional & scientific | 2022 |
| HNK Homes Limited | Other services | 2023 |
| Hntas Services Ltd | Professional & scientific | 2025 |
| Hobbsmarren Ltd | Administrative & support | 2016 |
| Holapets Ltd. | Wholesale & retail | 2019 |
| Holborough Dental Care Limited | Health & social care | 2007 |
| Hold My Hand Sourcing Ltd | Real estate | 2022 |
| Holdings 33 Limited | Real estate | 2023 |
| Holdings Clock Tower Limited | Financial services | 2023 |
| Holiday Meet and Greet Ltd | Transport & logistics | 2019 |
| Holiland Festival of Colours Limited | Administrative & support | 2017 |
| Hollybush Dental Care Limited | Health & social care | 2007 |
| Hollymason Property Management Limited | Households | 2002 |
| Home and Hart Limited | Real estate | 2025 |
| Home Counties Pools Group Holdings Ltd | Financial services | 2023 |
| Home Design Services Ltd | Construction | 2025 |
| Home Farm Barn Limited | Real estate | 2023 |
| Home-Physiotherapy Ltd | Health & social care | 2025 |
| Home-Start Crawley, Horsham and MID Sussex | Health & social care | 2009 |
| Homebridge Property Solutions Ltd | Real estate | 2025 |
| Homemade@Hayley's Ltd | Hospitality | 2024 |
| Homes Partnership Holdings Limited | Real estate | 2022 |
| Hometrust Kitchens Limited | Extraterritorial | 1981 |
| Hometrust Limited | Extraterritorial | 1980 |
| Homity Ltd | Real estate | 2018 |
| Honest Crew Ltd | Professional & scientific | 2022 |
| Honey Pots Childcare Limited | Education | 2010 |
| Honey Rich Limited | Extraterritorial | 2013 |
| Honeydew Media Marketing Limited | Professional & scientific | 2025 |
| Honeypack Ltd | Manufacturing | 2026 |
| Honeypot Logistics Ltd | Transport & logistics | 2024 |
| Hong Kong Restaurant Limited | Hospitality | 2025 |
| Honor Oak Dental Care Ltd | Health & social care | 2010 |
| Hophurst Ltd | Information & communication | 2019 |
| Hopla Finance Ltd | Other services | 2024 |
| Hopscotch Crawley Down Ltd | Health & social care | 2019 |
| Horizon Traffic Simulation Ltd | Transport & logistics | 2018 |
| Horley Limited | Real estate | 2016 |
| Horley Miniature Locomotives LLP | | 2010 |
| Horley Travels Ltd | Transport & logistics | 2024 |
| Horsham Automatic Doors Solutions Ltd | Manufacturing | 2025 |
| Horsham Dental Care Limited | Health & social care | 2007 |
| Horsham Distribution Ltd | Hospitality | 2024 |
| Horsham Gamechangers Limited | Arts & recreation | 2023 |
| Hostomic Ltd | Information & communication | 2016 |
| Hotel Ventures Ltd | Administrative & support | 2017 |
| House 365 Limited | Real estate | 2025 |
| House Force Ltd | Construction | 2020 |
| House of Grace PMU Ltd | Wholesale & retail | 2026 |
| House of Heritage (London UK) Limited | Real estate | 2021 |
| House of Marlyns Daughter Ltd | Health & social care | 2013 |
| House of Musk Ltd | Wholesale & retail | 2023 |
| House of Threads Limited | Wholesale & retail | 2024 |
| House of Warriors Limited | Arts & recreation | 2025 |
| House of Zinplex Limited | Wholesale & retail | 2014 |
| Howard Portfolio Management Limited | Real estate | 2017 |
| Howards Commercial Services Ltd | Administrative & support | 2024 |
| Howards Domestic Services Ltd | Administrative & support | 2024 |
| HP Assets Ltd | Real estate | 2022 |
| Hped Limited | Wholesale & retail | 2025 |
| HRH Building Contractors Ltd | Construction | 2018 |
| Hrsikesa Property Ltd | Extraterritorial | 2021 |
| HS Enterprise Ltd | Hospitality | 2025 |
| HS Transportation Limited | Transport & logistics | 2019 |
| Hsmp Forum (UK) Limited | Other services | 2008 |
| Hsmp Forum Limited | Other services | 2007 |
| HSZ Logistics Ltd | Transport & logistics | 2017 |
| HT AIM Trading Ltd | Wholesale & retail | 2026 |
| Htouch Ltd | Health & social care | 2015 |
| HTS Cars Ltd | Hospitality | 2018 |
| Hubex Properties Ltd | Real estate | 2025 |
| Huckleberry Innovations Ltd | Extraterritorial | 2011 |
| Hudson BS Limited | Professional & scientific | 2022 |
| Hudspith HR Ltd | Administrative & support | 2020 |
| Hugh Langmead Limited | Real estate | 1946 |
| Hummingbird Lily Ltd | Wholesale & retail | 2025 |
| Huntley Farms 2015 Limited | Extraterritorial | 2015 |
| Huntley Farms LLP | | 2005 |
| Huntley LLP | | 2004 |
| Husky Renovations Ltd | Construction | 2019 |
| Hvac Buyers Club Ltd | Wholesale & retail | 2023 |
| HWH Building Services Limited | Construction | 2026 |
| HWS Vehicle and Plant Repair Services Limited | Manufacturing | 2024 |
| HWT Cafe Limited | Hospitality | 2024 |
| Hy-Mac Construction Machinery Limited | Manufacturing | 2010 |
| Hybrid Mail Distribution Ltd | Administrative & support | 2024 |