| Himalayan Cotton House Limited | Wholesale & retail | 2022 |
| Himalayan Ventures UK Ltd | Wholesale & retail | 2026 |
| Himt Holdings Ltd | Financial services | 2021 |
| HIN Pharma Limited | Health & social care | 2018 |
| HIN Wong Netley Ltd | Hospitality | 2012 |
| Hind Building 2000 Limited | Construction | 1997 |
| Hindson Construction Limited | Construction | 2016 |
| Hinge Ltd | Information & communication | 2014 |
| Hinkseyipr Ltd | Manufacturing | 2000 |
| Hinton & SON Ltd | Real estate | 2025 |
| Hinton House Construction Limited | Construction | 2025 |
| Hinton King Limited | Administrative & support | 2014 |
| Hinton Landholdings Ltd | Real estate | 2001 |
| Hipir Ltd | Professional & scientific | 2025 |
| Hippo UK Limited | Information & communication | 1999 |
| HIR Holdings Ltd | Financial services | 2026 |
| Hire & Hire Solutions Ltd | Administrative & support | 2022 |
| Hiro Adrenaline Limited | Construction | 2015 |
| Hirst Aviation Ltd | Administrative & support | 2020 |
| History Bombs Limited | Information & communication | 2014 |
| HIT Systems Limited | Information & communication | 2003 |
| Hitdesk Automation Limited | Information & communication | 2023 |
| Hive Day Nursery and Preschool Ltd | Education | 2024 |
| Hiwaplumbing Ltd | Construction | 2026 |
| Hiwayman Limited | Information & communication | 2009 |
| Hiwwt Trading Limited | Professional & scientific | 2013 |
| Hiyacar Newco Ltd | Administrative & support | 2024 |
| HJ Express Ltd | Transport & logistics | 2025 |
| HJ Property Care Ltd | Construction | 2017 |
| HJA Business Solutions Limited | Professional & scientific | 2019 |
| HJA Electrical Contractors Ltd | Construction | 2017 |
| HJA Security Ltd | Administrative & support | 2020 |
| HJB Property Investments Ltd | Real estate | 2021 |
| HJK (Chandlers Ford) Limited | Other services | 2017 |
| HJK Trading Services Ltd | Transport & logistics | 2024 |
| HJL Consultancy Ltd | Professional & scientific | 2022 |
| HJS Accountants Ltd | Professional & scientific | 2001 |
| HJS Company Secretarial Services Limited | Extraterritorial | 2006 |
| HJS Financial Management Limited | Financial services | 2021 |
| HJS Financial Planning Limited | Professional & scientific | 2009 |
| HJS Group Limited | Financial services | 2020 |
| HJS Properties (South) Limited | Real estate | 2021 |
| HJS Technology Limited | Information & communication | 2007 |
| HK Accountancy Limited | Professional & scientific | 2011 |
| HK1 Holding Limited | Real estate | 2024 |
| HKL Tech Solutions Ltd | Professional & scientific | 2018 |
| HKM IT Firm Ltd | Information & communication | 2025 |
| HKS Couriers Ltd | Transport & logistics | 2025 |
| Hkwp Health & Beauty Ltd | Wholesale & retail | 2024 |
| HL Mortgages Ltd | Financial services | 2025 |
| HLD Accounts Ltd | Professional & scientific | 2026 |
| HM Holding Ltd. | Manufacturing | 2016 |
| HM Mot's Ltd | Wholesale & retail | 2025 |
| HM Vehicle Repairs Ltd | Wholesale & retail | 2017 |
| Hm&R Limited | Transport & logistics | 2024 |
| HM2 Property Solutions Ltd | Construction | 2020 |
| HMA Iqbal Ltd | Hospitality | 2024 |
| HMG Limited | Health & social care | 2016 |
| Hmlc Holdings Ltd | Financial services | 2018 |
| HMM Psychological Therapies Limited | Health & social care | 2021 |
| HMO (Southampton) Ltd | Real estate | 2023 |
| HMO Investment Partners Limited | Real estate | 2025 |
| HMS Events Limited | Hospitality | 2021 |
| HMS Property Management Services Limited | Real estate | 2005 |
| HMU Products Limited | Wholesale & retail | 2025 |
| Hmvc Healthcare Limited | Administrative & support | 2022 |
| HN Estates Ltd | Real estate | 2025 |
| HN Locum Pharma Ltd | Wholesale & retail | 2025 |
| HNA Commercial Property Ltd | Real estate | 2024 |
| Hnbfilms Ltd | Information & communication | 2019 |
| HNX Limited | Professional & scientific | 2018 |
| Hoang VU Limited | Other services | 2025 |
| HOB Creative Limited | Professional & scientific | 2024 |
| Hobb Lane (Hedge END) Management Company Limited | Households | 2017 |
| Hobbits Wine Bars Limited | Hospitality | 1983 |
| Hobbs the Printers Limited | Manufacturing | 1946 |
| Hobby House Models (Amplevine House) Limited | Wholesale & retail | 2025 |
| Hobson & Kelsey Limited | Administrative & support | 1947 |
| Hobson and Kelsey (Hedge END) Limited | Real estate | 1987 |
| Hobson Design Ltd | Manufacturing | 2014 |
| Hodders Law Limited | Professional & scientific | 2010 |
| Hodges Auto Centre Limited | Wholesale & retail | 2006 |
| Hoeford Business Park Ltd | Real estate | 1963 |
| HOG Wort Brewery Limited | Manufacturing | 2016 |
| Hogg Consultancy Services Limited | Information & communication | 2023 |
| Hogg Lettings Limited | Real estate | 2019 |
| Hokkaido Sushi Ltd | Hospitality | 2023 |
| Holborn Properties (UK) Limited | Construction | 2005 |
| Holbury Appliance Services Ltd | Wholesale & retail | 2011 |
| Holbury Barber Limited | Other services | 2024 |
| Holbury Fish Bar Limited | Real estate | 2012 |
| Holbury Manor Limited | Real estate | 1988 |
| Holbury Service Station Limited | Wholesale & retail | 1973 |
| Holdaway Financial Services Limited | Professional & scientific | 2016 |
| Holdcentral Residents Management Limited | Households | 1987 |
| Holding Events Limited | Administrative & support | 2020 |
| Holdings for Saxton Scaffolding Limited | Construction | 2026 |
| Holdstock Property Group Ltd | Real estate | 2025 |
| Holeshot Motocross Limited | Wholesale & retail | 2011 |
| Holiday Heat Ltd | Administrative & support | 2013 |