| Hidden Keileon CIC | Arts & recreation | 2022 |
| Hidden Level Ltd | Wholesale & retail | 2026 |
| Hidden Track Theatre C.I.C. | Arts & recreation | 2013 |
| Hidden Treasure Discovery Centre CIC | Health & social care | 2017 |
| Hide Collective Ltd | Professional & scientific | 2024 |
| Hide-Care Ltd | Wholesale & retail | 2026 |
| Hideaway Brewing Co Ltd | Manufacturing | 2020 |
| Hideaway Youth Project Limited | Education | 2005 |
| Hideout Manchester Limited | Administrative & support | 2026 |
| Hidmona Habesha Ltd | Wholesale & retail | 2025 |
| Hidoor Limited | Information & communication | 2025 |
| Hiersch Port Ltd | Wholesale & retail | 2022 |
| Hieunguyen Ltd | Manufacturing | 2025 |
| Hifi Services Ltd | Transport & logistics | 2024 |
| Hifon Ltd. | Professional & scientific | 2017 |
| Hifu Clinics UK Limited | Other services | 2016 |
| HIG Group Ltd | Financial services | 2026 |
| Higginbottom Investment Group Ltd | Real estate | 2017 |
| Higgins B. (UK) Ltd | Transport & logistics | 2015 |
| Higgins Electronic Limited | Manufacturing | 2023 |
| Higgins Height Hire Ltd | Administrative & support | 2023 |
| Higginson & SON Limited | Manufacturing | 2011 |
| Higginson and Sons Building Services Ltd | Construction | 2025 |
| Higginson Refrigeration Ltd | Professional & scientific | 2023 |
| Higginsons Land & Property Developers Ltd | Construction | 2020 |
| Higgo Homes Limited | Real estate | 2025 |
| Higgs Holding Co Limited | Professional & scientific | 2022 |
| High C Tech Limited | Wholesale & retail | 2019 |
| High Class Flights Ltd | Administrative & support | 2018 |
| High Class for Investment Ltd | Other services | 2021 |
| High Court Writ Recovery Limited | Public administration | 2023 |
| High Definition Resin Limited | Construction | 2021 |
| High Demand Ltd | Wholesale & retail | 2017 |
| High Ecom Group Offshore Limited | Professional & scientific | 2025 |
| High Elms Medical and Training Services Limited | Health & social care | 2012 |
| High END Compute Ltd | Administrative & support | 2017 |
| High END Friends Ltd | Wholesale & retail | 2019 |
| High Hills for Trading and Contracting Ltd | Wholesale & retail | 2024 |
| High Hopes Consulting Ltd | Professional & scientific | 2016 |
| High House for Contracting Ltd | Wholesale & retail | 2024 |
| High Lane Homes Ltd | Real estate | 2025 |
| High Lane Medical Services Limited | Health & social care | 2013 |
| High Lawn Village Management Company Limited | Households | 1983 |
| High Level Wellness Ltd | Wholesale & retail | 2017 |
| High Life & Co. Home Ltd | Wholesale & retail | 2025 |
| High Life Trade Ltd | Wholesale & retail | 2017 |
| High Market Ltd | Agriculture & fishing | 2021 |
| High Meadow Management Company (Swinton) Limited | Households | 2006 |
| High Peak Conversions Ltd | Wholesale & retail | 2019 |
| High Peak Hotel Ltd | Hospitality | 2025 |
| High Peak Pro Ltd | Information & communication | 2018 |
| High Performance Business Consulting Ltd | Professional & scientific | 2017 |
| High Performance for Trading Ltd | Wholesale & retail | 2022 |
| High Point Security Ltd | Administrative & support | 2023 |
| High Precision Equipment Limited | Professional & scientific | 1947 |
| High Rated Ltd | Wholesale & retail | 2024 |
| High Resolution Solutions Limited | Information & communication | 2022 |
| High Seas Escapades Ltd | Wholesale & retail | 2020 |
| High SIX Events Holdco Ltd | Professional & scientific | 2025 |
| High SIX Group Limited | Professional & scientific | 2025 |
| High SIX Labels Holdco Ltd | Information & communication | 2025 |
| High SIX Mgmt Holdco Ltd | Professional & scientific | 2025 |
| High Spec. Industries Limited | Manufacturing | 1987 |
| High Sprit Care Ltd | Health & social care | 2017 |
| High ST Manchester Ltd | Real estate | 2014 |
| High Standards International Group Ltd | Manufacturing | 2022 |
| High State Homes Ltd | Real estate | 2023 |
| High Street Fashion Limited | Wholesale & retail | 2016 |
| High Street Hucknall Development Limited | Real estate | 2021 |
| High Street Tower Ltd | Extraterritorial | 2023 |
| High Thiqah Transport Ltd | Transport & logistics | 2025 |
| High Tide Titanium Fasteners Ltd | Wholesale & retail | 2023 |
| High Time Digital Ltd | Other services | 2024 |
| High Vission UK Ltd | Hospitality | 2020 |
| High Voltage Technical Services Ltd | Professional & scientific | 2008 |
| High-End Interiors Ltd | Construction | 2015 |
| High-Level Maintenance Solutions Ltd | Construction | 2013 |
| High-O Ltd | Wholesale & retail | 2019 |
| Higham Commercial Ltd | Professional & scientific | 2013 |
| Highbank Residential Properties Ltd | Real estate | 2016 |
| Highbeech Consultancy Limited | Information & communication | 2002 |
| Highbelle Ltd | Wholesale & retail | 2022 |
| Highborn Global Limited | Administrative & support | 2024 |
| Highbow Limited | Professional & scientific | 2017 |
| Highcedars Limited | Households | 1977 |
| Highcliffe Real Estates (NO 2) Limited | Construction | 2019 |
| Highcontrast Limited | Real estate | 2004 |
| Highcroft Services Limited | Administrative & support | 2025 |
| Highcross Designs Limited | Manufacturing | 2003 |
| Highdale 613 Limited | Financial services | 2026 |
| Highdale Spaces Limited | Real estate | 2025 |
| Highdale SPV 1 Ltd | Real estate | 2025 |
| Highdale SPV 2 Ltd | Real estate | 2025 |
| Highend Fashion Limited | Wholesale & retail | 2025 |
| Higher Broughton Partnership LP | | 2004 |
| Higher Capacity Ltd | Professional & scientific | 2017 |
| Higher Care Ltd | Health & social care | 2020 |
| Higher Generation Ltd | Information & communication | 2025 |
| Higher Group Limited | Administrative & support | 2017 |
| Higher Resolution Limited | Professional & scientific | 1999 |