| Hussain Nottingham Holdings Ltd | Real estate | 2020 |
| Hussain Property Solutions Ltd | Real estate | 2023 |
| Hussain's Letting Ltd | Real estate | 2023 |
| Hussein Autos Limited | Wholesale & retail | 2025 |
| HUT 6 Ventures Limited | Professional & scientific | 2019 |
| Hutchings & Butlin Limited | Real estate | 1998 |
| Hutchinson Marketing Limited | Professional & scientific | 2025 |
| Hutchinson Plumbing and Heating Limited | Construction | 2023 |
| Huthwaite Holdings Limited | Financial services | 2019 |
| Huthwaite Plumbing & Heating Supplies Limited | Wholesale & retail | 1975 |
| Hutosh International Ltd | Wholesale & retail | 2023 |
| Huud Homes Ltd | Real estate | 2023 |
| HV Power Engineering Ltd | Construction | 2024 |
| Hvc&M Ltd | Professional & scientific | 2023 |
| HVK Global Ltd | Professional & scientific | 2024 |
| HVK Performance Limited | Wholesale & retail | 2021 |
| HVL Engineering Limited | Manufacturing | 2020 |
| HVL Solutions Limited | Construction | 2014 |
| HVN TM Ltd | Construction | 2024 |
| HVS Traders Ltd | Wholesale & retail | 2026 |
| HW Building Company Ltd | Construction | 2019 |
| HW Capital Group Ltd | Real estate | 2021 |
| HW Consulting Engineers Ltd | Administrative & support | 2019 |
| HW Properties Inc Ltd | Real estate | 2025 |
| HW Signs Ltd | Manufacturing | 2019 |
| HW Stepup Limited | Wholesale & retail | 2024 |
| HW Traders Ltd | Wholesale & retail | 2013 |
| HW Trading Group Limited | Wholesale & retail | 2023 |
| HW Wembley Ltd | Real estate | 2021 |
| Hwhite Design Consultancy Ltd | Professional & scientific | 2015 |
| HWM Skegness Limited | Hospitality | 2019 |
| Hwsps Limited | Real estate | 2020 |
| HWW Properties Ltd | Real estate | 2024 |
| HXD Consulting Ltd | Information & communication | 2023 |
| HYA Care Group Ltd | Health & social care | 2024 |
| HYA Properties Group Ltd | Real estate | 2025 |
| HYA Services Limited | Construction | 2022 |
| Hyacinth Modelling Ltd | Extraterritorial | 2023 |
| Hybrid Barn Ltd | Wholesale & retail | 2024 |
| Hybrid Electrical Contractors Ltd | Construction | 2016 |
| Hybrid Improvements Ltd | Construction | 2024 |
| Hybrid Pro Limited | Professional & scientific | 2023 |
| Hybrid Property Investments Limited | Real estate | 2026 |
| Hybrid Servicing Limited | Wholesale & retail | 2014 |
| Hybride Deux Soleils (PVT) (Électricité ET EAU Chaude) Limited | Manufacturing | 2020 |
| Hybridra Cars Limited | Administrative & support | 2025 |
| Hyco Ltd | Wholesale & retail | 2014 |
| Hyderabadi Biryani Ltd | Hospitality | 2024 |
| Hydrogen Aircraft Services Limited | Professional & scientific | 2016 |
| Hydrogen NOW Limited | Administrative & support | 2012 |
| Hydrohertz Limited | Manufacturing | 2020 |
| Hydrohertz Thermal Solutions Limited | Extraterritorial | 2023 |
| Hydrotech Draincare Ltd | Water & waste | 2023 |
| Hydrotechnik UK Test Engineering Limited | Wholesale & retail | 1990 |
| Hygieia Holdings Limited | Manufacturing | 2020 |
| Hygiene 1ST Mobility Limited | Professional & scientific | 2024 |
| Hygienic Pigging Systems Limited | Manufacturing | 1994 |
| Hygienix Limited | Wholesale & retail | 2008 |
| Hylands Hotel (Nottingham) Limited | Hospitality | 1979 |
| Hylands Lettings Ltd | Construction | 2026 |
| Hyle Holdings Ltd | Construction | 2020 |
| Hyle Homes Ltd | Real estate | 2020 |
| Hylyfe Leicester Ltd | Construction | 2022 |
| Hylyfe Management Limited | Real estate | 2020 |
| Hyman Black Limited | Wholesale & retail | 2020 |
| Hyman Holdings Ltd | Real estate | 2024 |
| HYP Limited | Construction | 2018 |
| HYP Therapie Limited | Other services | 2022 |
| Hyper Padel Leagues Ltd | Arts & recreation | 2025 |
| Hyper Tech IT Ltd | Information & communication | 2021 |
| Hyperama PLC | Wholesale & retail | 1991 |
| Hyperintelligence Ltd | Professional & scientific | 2025 |
| Hyperion 88 Ltd | Wholesale & retail | 2024 |
| Hyperion Electrical Ltd | Construction | 2019 |
| Hyperion Product Development Ltd | Professional & scientific | 2011 |
| Hyperise Ltd | Information & communication | 2021 |
| Hypermech Engineering Ltd | Mining & quarrying | 2013 |
| Hypervation Ltd | Information & communication | 2024 |
| Hyson Green Community Action CIC | Administrative & support | 2024 |
| Hyson Green Developments Limited | Real estate | 2015 |
| Hyson Green Lettings Limited | Real estate | 2017 |
| Hyson Green Limited | Real estate | 2015 |
| Hyson Green Youth Club | Extraterritorial | 2008 |
| Hyssop Cleaning Service Ltd | Administrative & support | 2024 |
| HZ Beauty Studio & Collective Ltd | Other services | 2026 |
| HZ Dynamics Limited | Wholesale & retail | 2017 |
| HZK Chippy Ltd | Hospitality | 2026 |
| HZL Limited | Other services | 2012 |
| HZL Specialist Solutions Limited | Education | 2007 |
| HZO Holdings Ltd | Financial services | 2026 |
| I & AK Properties Limited | Real estate | 2022 |
| I & R Management Ltd | Real estate | 2022 |
| I & R Prime Properties Ltd | Real estate | 2021 |
| I & S Motors Ltd | Wholesale & retail | 2024 |
| I & S Serv Limited | Construction | 2025 |
| I ALI Consulting Ltd | Professional & scientific | 2025 |
| I AM Energy Ltd | Energy | 2020 |
| I AM Marketing Ltd | Professional & scientific | 2023 |
| I AM Property Management Ltd | Real estate | 2024 |
| I AM Residential Limited | Construction | 2010 |