| High Definition Security Systems Ltd | Administrative & support | 2012 |
| High Elms Park (Hullbridge) Management Company Limited | Households | 2020 |
| High Street Fish Limited | Hospitality | 2010 |
| Highfield Windows Limited | Construction | 2026 |
| Highton Court Management Company Limited | Households | 2002 |
| Highwood (Filton) Management Company Limited | Households | 2019 |
| Hill's Caravan Services Ltd | Manufacturing | 2022 |
| Himbury Homes Ltd | Real estate | 2020 |
| Hinde House Management Company Ltd | Real estate | 2005 |
| Hinnao Technology Ltd | Manufacturing | 2022 |
| Hirmohan Limited | Hospitality | 2026 |
| Hitbay Aparels Ltd | Wholesale & retail | 2025 |
| Hive Residential Limited | Real estate | 2024 |
| Hive Work Zones Limited | Other services | 2019 |
| Hivedome Limited | Information & communication | 1983 |
| HJI Property Management Limited | Real estate | 2016 |
| HKH Property Investments Limited | Real estate | 2021 |
| HKS Autos Ltd | Wholesale & retail | 2025 |
| HLR20 Consulting Limited | Professional & scientific | 2019 |
| HM Tradelink Limited | Wholesale & retail | 2025 |
| HMA Express Ltd | Transport & logistics | 2025 |
| HNJ Property Limited | Real estate | 2022 |
| HNP Homes & Properties Ltd | Real estate | 2021 |
| HNR Solutions Ltd | Professional & scientific | 2022 |
| Hodl Hires Limited | Administrative & support | 2023 |
| HOI LIK International Limited | Extraterritorial | 2021 |
| Holder Holdings Limited | Financial services | 2022 |
| Holiday Hunters Ltd | Administrative & support | 2020 |
| Holistic Nurture Limited | Health & social care | 2017 |
| Holival Management Limited | Real estate | 2018 |
| Holland's Electrical Services Limited | Construction | 2022 |
| Holliday & Osborne Building Ltd | Construction | 2019 |
| Hollins Park View (Stocksbridge) Management Company Limited | Households | 2026 |
| Holloway Coaching Limited | Education | 2018 |
| Holly Samantha Mitchell Ltd | Professional & scientific | 2025 |
| Hollycroft Limited | Construction | 2024 |
| Hollymede Cottage Limited | Health & social care | 2003 |
| Holmesian Consultants Ltd | Professional & scientific | 2014 |
| Home (Hersham) Management Company Limited | Households | 2013 |
| Home Estate Agents of Leigh Limited | Real estate | 2011 |
| Home Grown Hot Rods & Restorations Limited | Other services | 2011 |
| Home Solutions Essex Ltd | Wholesale & retail | 2023 |
| Homebridge Care Group Ltd | Health & social care | 2020 |
| Homecare Professionals (Essex) Limited | Health & social care | 2014 |
| Homecareguardian Ltd | Information & communication | 2026 |
| Homefort Care Specialist Ltd | Health & social care | 2025 |
| Homeless Action Resource Project | Health & social care | 2002 |
| Homelux Properties Ltd | Construction | 2023 |
| Homes (South) Limited | Construction | 2024 |
| Homes Development 1 Limited | Construction | 2024 |
| Homes Direct Southend Limited | Real estate | 2017 |
| Homeseed Properties Ltd | Construction | 2023 |
| Honeycomb News Limited | Wholesale & retail | 2024 |
| Honeycomb Properties (Thorpe Bay) Limited | Construction | 2022 |
| Hood Group Administration Limited | Financial services | 1983 |
| Hood Group Limited | Financial services | 1995 |
| Hood Travel Limited | Financial services | 2012 |
| Hooper Homes Ltd | Real estate | 2009 |
| Hopfields (Ledbury) Management Company Limited | Households | 2023 |
| Hopkins Young Electrical Limited | Construction | 1999 |
| Horimand Limited | Wholesale & retail | 2026 |
| Horizon & Universe Ltd | Hospitality | 2023 |
| Hornett's Design Limited | Manufacturing | 1998 |
| Horton Homes 2 Limited | Real estate | 2018 |
| Horton Homes Ltd | Construction | 2015 |
| Horwood Building Company Limited | Construction | 2016 |
| Hosesido Limited | Health & social care | 2019 |
| Hoss ENG Limited | Manufacturing | 2022 |
| House of Curry Limited | Hospitality | 2025 |
| House of Fate Ltd | Manufacturing | 2026 |
| House of Glazed Ltd | Hospitality | 2024 |
| House of Toviel Limited | Wholesale & retail | 2011 |
| Houseofjamila Limited | Other services | 2025 |
| Howard Arnold Ltd | Professional & scientific | 2021 |
| Howe 2 LET Limited | Real estate | 2016 |
| Howell Origin Ltd | Wholesale & retail | 2026 |
| Howmatic Ltd | Information & communication | 2025 |
| Howzit Limited | Professional & scientific | 2024 |
| Hoxton Macs Ltd | Wholesale & retail | 2013 |
| HP Accountants Ltd | Professional & scientific | 2019 |
| HPA Developments Limited | Real estate | 2023 |
| HR Belfairs Limited | Real estate | 2010 |
| HR Prittlewell Limited | Real estate | 2010 |
| HR Shoeburyness Limited | Real estate | 2010 |
| HR Wakering Limited | Real estate | 2010 |
| HR Wigmore Limited | Real estate | 2016 |
| HRP Access Limited | Construction | 2026 |
| Htr-Uk Limited | Wholesale & retail | 2025 |
| Hughes Grading Ltd | Extraterritorial | 2023 |
| Hughes Lifting Services Ltd | Construction | 2012 |
| Hunter & Sons Tree Services Ltd | Administrative & support | 2017 |
| Hunts Drive Management Co Ltd | Households | 2013 |
| Hush Bar Southend Limited | Hospitality | 2022 |
| Huxy Facilities Limited | Financial services | 2010 |
| Huxy Holdings Ltd | Financial services | 2025 |
| Huxy Lettings Ltd | Real estate | 2008 |
| HVG Sorrell Limited | Real estate | 2019 |
| Hwfg Clothing Ltd | Wholesale & retail | 2025 |
| HY Holdings Limited | Financial services | 2019 |
| Hydra CPO Ltd | Other services | 2025 |