| HA HA! Business Ltd | Information & communication | 2021 |
| Ha-Styled Ltd | Wholesale & retail | 2026 |
| Haarhaar Ltd | Wholesale & retail | 2022 |
| Habe Ltd | Information & communication | 2017 |
| Habello Ltd | Real estate | 2025 |
| Hability Ltd | Information & communication | 2024 |
| Habitat Timber Frame Ltd | Construction | 2012 |
| Hadlow Stone Limited | Real estate | 2024 |
| Hadon Ltd | Professional & scientific | 2025 |
| Hafade Limited | Hospitality | 2025 |
| Hafasa Omid Ltd | Wholesale & retail | 2025 |
| Hagbad Ltd | Information & communication | 2024 |
| Haig Developments Ltd | Construction | 2014 |
| Hailey Cara 1 Ltd | Real estate | 2025 |
| Haima Consulting Ltd | Professional & scientific | 2016 |
| Haimac Limited | Real estate | 2020 |
| Hair & Beauty by Nessa Ltd | Other services | 2024 |
| Hair Anatomy UK Ltd | Other services | 2019 |
| Hair by Murad Ltd | Other services | 2017 |
| Hair Loss Clinic Bournemouth Ltd | Other services | 2024 |
| Haisem Ltd | Information & communication | 2025 |
| Haizelen Ltd | Wholesale & retail | 2024 |
| Halcyon Court Limited | Households | 2003 |
| Halcyon Homestays Ltd | Real estate | 2025 |
| Haldane Estates Ltd | Real estate | 2025 |
| Halex Property Ltd | Real estate | 2025 |
| Half Baked Solutions Limited | Information & communication | 2010 |
| Halfway Poole Ltd | Hospitality | 2023 |
| Halicord Limited | Real estate | 2006 |
| Halix Limited | Hospitality | 1981 |
| Halliday Duncan Consulting Limited | Professional & scientific | 2017 |
| Hallmark Broadcast Limited | Information & communication | 2009 |
| Hallmark Hypnotherapy Ltd | Health & social care | 2025 |
| Hallmaster Ltd | Public administration | 2017 |
| Halls Real Estate Ltd | Real estate | 2017 |
| Hallstan Roofing Limited | Construction | 2025 |
| Halo Homes Management Ltd | Other services | 2024 |
| Halo Toothpaste Ltd | Wholesale & retail | 2025 |
| Halton Marketing Ltd | Other services | 2022 |
| Hamadshandmadescraft Ltd | Wholesale & retail | 2024 |
| Hamber and J Arthur Properties Ltd | Real estate | 2022 |
| Hamber Homes Ltd | Real estate | 2020 |
| Hamber Properties Limited | Real estate | 2019 |
| Hamer Investments Limited | Financial services | 2025 |
| Hamerkop Advisory Limited | Professional & scientific | 2025 |
| Hamidavi Ltd | Professional & scientific | 2024 |
| Hamilton 12 Freehold Limited | Households | 2008 |
| Hamilton and Co Hairdressing Ltd | Other services | 2025 |
| Hamilton Bayley Associates Limited | Health & social care | 2019 |
| Hamilton Carpentry and Construction Ltd | Construction | 2018 |
| Hamilton Imperial Properties Limited | Extraterritorial | 2010 |
| Hammad Ecom Trader Limited | Wholesale & retail | 2025 |
| Hammock Counselling Limited | Health & social care | 2024 |
| Hampshire Breast Clinic Ltd | Health & social care | 2023 |
| Hampshire Breast Imaging Ltd | Health & social care | 2025 |
| Hampshire Endodontics Limited | Health & social care | 2023 |
| Hampshire Oncology Limited | Health & social care | 2015 |
| Hampshire Plant and Commercial Ltd | Manufacturing | 1999 |
| Hampton Interior Design Ltd | Professional & scientific | 2020 |
| Hamworthy Car Centre Limited | Wholesale & retail | 2003 |
| Hamworthy Holdings Limited | Financial services | 2022 |
| Hamworthy International Holding Ltd | Financial services | 2026 |
| Hamworthy International Ltd | Manufacturing | 1962 |
| Hamworthy MOT Ltd | Wholesale & retail | 2025 |
| Hamworthy Park Art Community Interest Company | Arts & recreation | 2025 |
| Hamworthy Property Limited | Real estate | 2022 |
| Hamworthy United Football Club Limited | Arts & recreation | 2018 |
| Hamza Hafeez Limited | Real estate | 2025 |
| Han'Ei Collection Limited | Wholesale & retail | 2024 |
| Hancox Electrical Services Ltd | Construction | 2023 |
| Hand Craft Composites Ltd | Professional & scientific | 2014 |
| Hand Made Spaces Limited | Extraterritorial | 2007 |
| Hand of Ogun Protection Ltd | Administrative & support | 2024 |
| Handball Dorset CIC | Education | 2025 |
| Handmade Kitchens of Christchurch Limited | Wholesale & retail | 2003 |
| Hands of Comfort Ltd | Health & social care | 2025 |
| Handyworx Limited | Construction | 2005 |
| Hanesstockes Limited | Wholesale & retail | 2025 |
| Hang Loose Entertainment Ltd | Arts & recreation | 2012 |
| Hangover Hill Ltd | Information & communication | 2017 |
| Hania AL Hadhrami Limited | Wholesale & retail | 2025 |
| Hanliu Ltd | Manufacturing | 2022 |
| Hann Gardens Management Co Ltd. | Other services | 2008 |
| Hannah Bright Wellness Limited | Arts & recreation | 2021 |
| Hannams Close Freehold Limited | Households | 2019 |
| Hanneford Finance Company Limited (the) | Construction | 1973 |
| Haplo Limited | Administrative & support | 2019 |
| Happy Buddha Limited | Wholesale & retail | 2016 |
| Happy Feet Nursery & Preschool (Westbourne) Ltd | Education | 2024 |
| Happy Feet Nursery & Preschool (Wimborne) Ltd | Health & social care | 2024 |
| Happy Forest Design Limited | Professional & scientific | 2020 |
| Happy House South Ltd | Real estate | 2025 |
| Happy Lion Media Limited | Information & communication | 2008 |
| Happy Tea Properties Ltd | Real estate | 2024 |
| Happydent Limited | Health & social care | 2013 |
| Happytickets Limited | Information & communication | 2020 |
| Haptic Limited | Wholesale & retail | 2004 |
| Harati Mata Takeaway Ltd | Hospitality | 2024 |
| Harbar Blue Ltd | Hospitality | 2014 |
| Harbor Point Limited | Professional & scientific | 2024 |