| HNN Investments Ltd | Real estate | 2021 |
| HNN Trading Limited | Wholesale & retail | 2009 |
| Hnnss Ltd | Administrative & support | 2022 |
| Hnpk Properties Ltd | Real estate | 2024 |
| HNR Catering Supplies Ltd | Wholesale & retail | 2015 |
| Hnrl Ltd | Information & communication | 2022 |
| HNS Enterprise Ltd | Professional & scientific | 2025 |
| HNS Investments Ltd | Real estate | 2018 |
| HNS Optical Ltd | Wholesale & retail | 2019 |
| HNS Surveyors Ltd | Professional & scientific | 2024 |
| HNS Transport Ltd | Transport & logistics | 2017 |
| HNS Tyres Ltd | Wholesale & retail | 2025 |
| Hnsg Properties Limited | Real estate | 2018 |
| HNT Ltd | Health & social care | 2016 |
| HNW UK Ltd | Manufacturing | 2017 |
| HO HO 280 Limited | Hospitality | 2023 |
| HO HO Yardley Limited | Hospitality | 2025 |
| Ho-Siid Ltd | Hospitality | 2021 |
| Ho-Well International Ltd | Wholesale & retail | 2024 |
| Hoan Ltd | Wholesale & retail | 2014 |
| Hoard on a Minute Ltd | Manufacturing | 2025 |
| Hobbs Enterprise Limited | Real estate | 1989 |
| Hobby Zone Limited | Wholesale & retail | 2022 |
| HOBBY26 Limited | Wholesale & retail | 2026 |
| Hobday Solutions Limited | Construction | 2009 |
| Hobmoor House Management Company Limited | Administrative & support | 2018 |
| Hobo Holding Limited | Real estate | 2025 |
| Hobs Electrical Limited | Construction | 2019 |
| Hobs Moat Holding Limited | Financial services | 2014 |
| Hobson Grange Ltd | Real estate | 2022 |
| HOC Brand Management Ltd | Professional & scientific | 2025 |
| Hocgroup Limited | Wholesale & retail | 2026 |
| Hocken Sound Contracts Limited | Other services | 2002 |
| Hockley Automotive Limited | Wholesale & retail | 2023 |
| Hockley Brook Limited | Real estate | 2025 |
| Hockley Building Services Limited | Construction | 1997 |
| Hockley Community Day Nursery Ltd | Education | 2025 |
| Hockley Consultancy Limited | Professional & scientific | 2024 |
| Hockley Developments (Mount Street) Limited | Construction | 2017 |
| Hockley Developments (Palm Street) Limited | Construction | 2018 |
| Hockley Developments (Station Road) Ltd | Construction | 2024 |
| Hockley Gold Limited | Wholesale & retail | 2025 |
| Hockley Group Ltd | Professional & scientific | 2017 |
| Hockley Jewellers Limited | Wholesale & retail | 2014 |
| Hockley Mechanical and Electrical Services Limited | Manufacturing | 2013 |
| Hockley Metal Sales Limited | Manufacturing | 1993 |
| Hockley Mint EOT Limited | Professional & scientific | 2023 |
| Hockley Mint Limited | Manufacturing | 1980 |
| Hockley Mobiles Ltd | Wholesale & retail | 2020 |
| Hockley Operations Ltd | Hospitality | 2023 |
| Hockley Roti Junction Limited | Wholesale & retail | 2018 |
| Hockley Service & Maintenance Limited | Extraterritorial | 1998 |
| Hockley Store Ltd | Wholesale & retail | 2023 |
| Hockley Trading Ltd | Hospitality | 2023 |
| Hockley Trustees Limited | Other services | 2025 |
| Hockley Tyres Ltd | Wholesale & retail | 2026 |
| Hodge Hill Freight and Travel Ltd | Transport & logistics | 2011 |
| Hodge Hill Motors Ltd | Wholesale & retail | 2022 |
| Hodge Hill Services Ltd | Real estate | 2021 |
| Hodge Hill Transport Ltd | Transport & logistics | 2022 |
| Hodge Housing Ltd | Real estate | 2025 |
| Hodgkinson Builders Holdings Limited | Construction | 2020 |
| Hodgson & Friend Limited | Construction | 2023 |
| Hodo Market Limited | Administrative & support | 2014 |
| Hodu Digital UK Ltd | Information & communication | 2026 |
| HOE Park Heights Limited | Real estate | 2024 |
| Hoey Diagnostics Ltd | Health & social care | 2011 |
| Hoeys Deals 316 Ltd | Wholesale & retail | 2025 |
| Hoffman Project Engineering Ltd | Other services | 2015 |
| Hoffmann UK Quality Tools Limited | Administrative & support | 2007 |
| Hofish Maternity Clothes Ltd | Wholesale & retail | 2023 |
| Hoft Store Limited | Wholesale & retail | 2025 |
| Hogan Properties Limited | Households | 2019 |
| Hogan Technical Consultancy Ltd | Information & communication | 2019 |
| Hoganas Solutions Ltd | Administrative & support | 2016 |
| Hohm Holdings Limited | Construction | 2018 |
| Hohm Property 1 Limited | Construction | 2018 |
| Hohm Property 2 Limited | Construction | 2019 |
| HOI Sea Limited | Real estate | 2020 |
| Hojaba Limited | Wholesale & retail | 2016 |
| Hojden Ltd | Manufacturing | 2024 |
| Hokan Brothers Ltd | Construction | 2023 |
| Hokin Limited | Real estate | 2021 |
| Hokn Ltd | Information & communication | 2026 |
| Hoko Limited | Real estate | 2021 |
| Hola's Kitchen Food to Go Ltd | Hospitality | 2023 |
| Holberrow Holdings Limited | Construction | 2021 |
| Holborn (WS) Limited | Real estate | 2019 |
| Holborn Energy Limited | Energy | 2012 |
| Holborn Waste 2015 Limited | Water & waste | 2015 |
| Holbrooks Pharmacy Limited | Wholesale & retail | 2025 |
| Holcombe House Ltd | Real estate | 2018 |
| Hold Hand Together Limited | Education | 2026 |
| Holden Controlled Environments (UK) Ltd | Construction | 2022 |
| Holdens Supaseal Limited | Manufacturing | 1977 |
| Holder Blackthorn LLP | | 2002 |
| Holder Catering Limited | Hospitality | 2025 |
| Holder Electrical Telecommunications Limited | Information & communication | 2013 |
| Hole Drilling & Concrete Cutting Ltd | Construction | 2024 |
| Holford Drive Community Sports Hub Limited | Arts & recreation | 2013 |