| HWV Holdings Ltd | Administrative & support | 2023 |
| HX Hairdressing Ltd | Other services | 2019 |
| Hyalis Bath Ltd | Wholesale & retail | 2025 |
| Hybrid (FM) Group Ltd | Manufacturing | 2024 |
| Hybrid Energies Limited | Professional & scientific | 2014 |
| Hybrid Homes and Land Limited | Construction | 2023 |
| Hybrid HR Limited | Administrative & support | 2022 |
| Hybrid Independent Living Ltd | Administrative & support | 2011 |
| Hybrid Intelligence Technologies Ltd | Information & communication | 2025 |
| Hybrid Style Clothing Ltd | Wholesale & retail | 2023 |
| Hybridfordon Ltd | Construction | 2022 |
| Hyconevsolutions Ltd | Construction | 2022 |
| Hyde Corporations Ltd | Professional & scientific | 2025 |
| Hydra Talent Solutions Ltd | Professional & scientific | 2019 |
| Hydraclean Holdings 2007 Limited | Administrative & support | 2007 |
| Hydraclean Leasing Limited | Administrative & support | 2026 |
| Hydraclean Limited | Administrative & support | 1978 |
| Hydraroll Limited | Extraterritorial | 2002 |
| Hydrate Drinks Group Limited | Manufacturing | 2017 |
| Hydraulic Engineering Services (Liverpool) Ltd | Wholesale & retail | 2005 |
| Hydria Holdings Ltd | Financial services | 2026 |
| Hydria Ltd | Hospitality | 2023 |
| Hydrocat UK Ltd | Professional & scientific | 2026 |
| Hydrofix International Ltd | Professional & scientific | 2016 |
| Hydrolectrix IP Limited | Extraterritorial | 2022 |
| Hydrolectrix Ltd | Extraterritorial | 2014 |
| Hydrolux Exterior Cleaners Ltd | Wholesale & retail | 2025 |
| Hyena Ltd | Real estate | 2021 |
| Hygge Coaching Limited | Administrative & support | 2024 |
| Hygienic Design and Installation Limited | Construction | 2002 |
| Hygienic Pipe Services Limited | Administrative & support | 2014 |
| HYL 2023 Limited | Hospitality | 2023 |
| Hyland Childcare Limited | Education | 2017 |
| Hynd Construction (Merseyside) Limited | Wholesale & retail | 1974 |
| Hynd Designed Landscapes Ltd | Construction | 2023 |
| Hynes & Bird Capital Ltd | Real estate | 2025 |
| Hynot Ltd | Other services | 2025 |
| Hypa Ltd | Administrative & support | 2019 |
| Hypa Publishing Ltd | Information & communication | 2025 |
| Hypatia Clinic Ltd | Wholesale & retail | 2024 |
| Hypatia Training Ltd | Education | 2017 |
| Hype Media Marketing Ltd | Professional & scientific | 2022 |
| Hype Property Investments Ltd | Real estate | 2024 |
| Hyperax Fightwear Limited | Wholesale & retail | 2025 |
| Hypercolour Blue Limited | Manufacturing | 2020 |
| Hyperconnect (Central Dock) Limited | Administrative & support | 2019 |
| Hyperev Ltd | Manufacturing | 2020 |
| Hyperion Cleantech Group Ltd | Financial services | 2019 |
| Hypermagnetic Ltd | Extraterritorial | 2022 |
| Hyrda+ Limited | Manufacturing | 2025 |
| HYT Energy Limited | Construction | 2024 |
| HZ Furniture Ltd | Manufacturing | 2024 |
| I & B Barber 1 Ltd | Other services | 2020 |
| I & M Convenience Store Ltd | Wholesale & retail | 2024 |
| I & S News Ltd | Other services | 2017 |
| I & S Servicing Ltd | Professional & scientific | 2011 |
| I & T Electrical & Engineering Ltd | Construction | 2019 |
| I AM About YOU Limited | Education | 2014 |
| I AM Flatpack MAN Ltd | Construction | 2021 |
| I AM Holm Limited | Information & communication | 2026 |
| I AM Legal Limited | Extraterritorial | 2013 |
| I Budesteanu Ltd | Transport & logistics | 2024 |
| I D a S (Butchers) Limited | Administrative & support | 2006 |
| I D Interiors Limited | Manufacturing | 2026 |
| I D Johnson Limited | Professional & scientific | 2019 |
| I G S North West Limited | Wholesale & retail | 2022 |
| I Gornell Engineering Ltd | Professional & scientific | 2024 |
| I J W Solutions Ltd | Professional & scientific | 2025 |
| I M Driving Services Ltd | Transport & logistics | 2018 |
| I Maintenance North West Ltd | Real estate | 2012 |
| I Need International Ltd | Wholesale & retail | 2022 |
| I P Truck Parts Limited | Wholesale & retail | 1984 |
| I R Distributions Ltd | Wholesale & retail | 2017 |
| I Roberts Limited | Construction | 2015 |
| I Squared Developments Limited | Construction | 2023 |
| I Tax UK Business Solutions Limited | Professional & scientific | 2013 |
| I Team Embassy UK Ltd | Wholesale & retail | 2001 |
| I&I Interiors Limited | Construction | 2018 |
| I&K Corporation Ltd | Wholesale & retail | 2025 |
| I&P Engineering Ltd | Manufacturing | 2015 |
| I&R Property Ltd | Real estate | 2019 |
| I'M Only Sleeping Limited | Wholesale & retail | 2014 |
| I-Line Counters (Holdings) Limited | Administrative & support | 2015 |
| I-Line Counters Limited | Manufacturing | 2011 |
| I-Line Holdings Limited | Administrative & support | 2023 |
| I-Team C & H 2026 Ltd | Wholesale & retail | 2025 |
| I-Team Cleaning & Hygiene UK Ltd | Wholesale & retail | 2026 |
| I.C. Ceramics (U.K.) Limited | Construction | 1997 |
| I.C.S Civils Ltd | Water & waste | 2026 |
| I.C.U. Security (Liverpool) Ltd | Administrative & support | 2005 |
| I.D Construction North West Ltd | Construction | 2026 |
| I.D. Consultancy (Liverpool) Limited | Administrative & support | 2016 |
| I.D.M.U. Limited | Information & communication | 1998 |
| I.E.D. Holdings Ltd | Professional & scientific | 1999 |
| I.E.D. Installations Limited | Construction | 1995 |
| I.L.Drossoo Limited | Other services | 2014 |
| I.L.S Group (NW) Ltd | Real estate | 2019 |
| I.P.P. Comps Ltd | Other services | 2025 |
| I.T. SO Simple Ltd | Information & communication | 2009 |
| I.W.S. (NW) Ltd | Professional & scientific | 2011 |