| Handdels London Limited | Transport & logistics | 2016 |
| Handle Artists Management Limited | Professional & scientific | 1973 |
| Handley Country Park Limited | Real estate | 2021 |
| Handley Daniel Ltd | Hospitality | 2023 |
| Handley Electrical Limited | Construction | 2022 |
| Handmade Theatre | Arts & recreation | 2016 |
| Hands of Rescue C.I.C. | Health & social care | 2020 |
| Hands on Health UK Wellbeing Ltd | Other services | 2015 |
| Hands on PUB Co. Ltd | Hospitality | 2001 |
| Hands UP Productions Limited | Arts & recreation | 1995 |
| Hands UP Puppets Limited | Arts & recreation | 1989 |
| Hands&Harmony Care Ltd | Health & social care | 2025 |
| HANDS2SHOULDER Ltd | Health & social care | 2016 |
| Handy Grab Hire Limited | Administrative & support | 2005 |
| Handy Woman Signs Ltd | Manufacturing | 2021 |
| Handyman H Ltd | Construction | 2026 |
| Handyman Matt Limited | Construction | 2015 |
| Handyman Solutions Ltd | Manufacturing | 2023 |
| Hangover Roofing & Building Ltd | Construction | 2025 |
| Hania Homes Ltd | Real estate | 2026 |
| Hankgrange Limited | Households | 1978 |
| Hankoe Motorsport Limited | Professional & scientific | 1990 |
| Hanl Consultancy Ltd | Hospitality | 2026 |
| Hanlon Computer Systems Limited | Information & communication | 1993 |
| Hann Books Limited | Information & communication | 2010 |
| Hannah Burt Properties Limited | Real estate | 2012 |
| Hannah Howe Legal Services Limited | Professional & scientific | 2021 |
| Hannah Quigley Ceramics Limited | Manufacturing | 2021 |
| Hannah Sword Ltd | Professional & scientific | 2021 |
| Hannahdrome Limited | Construction | 2022 |
| Hannaton Limited | Health & social care | 2026 |
| Hannaton Property Investments Limited | Real estate | 2026 |
| Hans Durner Translations Ltd. | Administrative & support | 2013 |
| Hansur Ltd | Health & social care | 2013 |
| Hansur Property Ltd | Real estate | 2022 |
| Hantona Ltd | Health & social care | 2014 |
| Hanya Homecare Ltd | Health & social care | 2022 |
| Hanys Ltd | Wholesale & retail | 2019 |
| Hanzey Brown Ltd | Professional & scientific | 2026 |
| Haphe CIC | Health & social care | 2023 |
| Happy 115 Limited | Hospitality | 2024 |
| Happy Days Childcare Services Ltd | Education | 2016 |
| Happy Days Group Care Ltd | Other services | 2015 |
| Happy Ears EAR WAX Removal Clinic Nottingham Ltd | Health & social care | 2023 |
| Happy Garden 2025 Ltd | Hospitality | 2025 |
| Happy Gleam Cleaner Ltd | Administrative & support | 2025 |
| Happy Henny After CIC | Agriculture & fishing | 2025 |
| Happy Home Furnishing Ltd | Wholesale & retail | 2026 |
| Happy Hub Consulting Limited | Extraterritorial | 2021 |
| Happy Inn Day Centre CIC | Arts & recreation | 2025 |
| Happy Life Living CIC | Health & social care | 2026 |
| Happy Little Star Limited | Construction | 2025 |
| Happy NG Limited | Hospitality | 2022 |
| Happy Phoenix 25 Ltd | Hospitality | 2024 |
| Happy Swimmers Ltd | Education | 2024 |
| Happy Valley Property Ltd | Construction | 2021 |
| Happybit Ltd | Information & communication | 2010 |
| Happymar Ltd | Hospitality | 2026 |
| Happypaws Haven Ltd | Wholesale & retail | 2025 |
| Hapsworth Ltd | Professional & scientific | 2025 |
| Haptiv Ltd | Professional & scientific | 2021 |
| Haqstudios Ltd | Professional & scientific | 2025 |
| HARA2 Business Group Ltd | Information & communication | 2021 |
| Haral Ltd | Administrative & support | 2025 |
| Haramain Giving Ltd | Wholesale & retail | 2026 |
| Haran & Sons Ltd | Construction | 2024 |
| Harben Green Human Capital Limited | Administrative & support | 2014 |
| Harbett Holdings Limited | Financial services | 2018 |
| Harbons' Creative Solutions Ltd | Wholesale & retail | 2020 |
| Harbor Lights Entertainment (UK) Limited | Information & communication | 1987 |
| Harborough Tool Hire Limited | Administrative & support | 2005 |
| Harbour Maintenance Ltd | Administrative & support | 2020 |
| Harbourdale Capital Ltd | Financial services | 1984 |
| Harbourdale Care Ltd | Construction | 2021 |
| Harbourdale Crandon Projectco 1 Limited | Construction | 2024 |
| Harbourdale Developments Ltd | Construction | 2021 |
| Harbourdale Lincoln Ltd | Construction | 2021 |
| Harbourdale Property Ltd | Construction | 2021 |
| Harby Garage Ltd. | Wholesale & retail | 2001 |
| Harby Hayes Property Ltd | Construction | 2025 |
| Harcourt House (West Bridgford) Management Company Limited | Households | 2006 |
| Harcourt Landscapes Limited | Construction | 2019 |
| Harcourt Property Improvements Ltd | Manufacturing | 2019 |
| HARD4ORCE Limited | Information & communication | 2019 |
| Hardeymor Global Concept Ltd | Other services | 2025 |
| Hardforce Limited | Extraterritorial | 2016 |
| Hardi Nice Barber Ltd | Other services | 2024 |
| Hardie Medico-Legal Holdings Ltd | Financial services | 2026 |
| Hardie Medico-Legal Services Ltd | Professional & scientific | 2012 |
| Hardihood Healthcare Ltd | Health & social care | 2022 |
| Harding and Dodds Properties Limited | Real estate | 2019 |
| Harding Thompson Limited | Real estate | 2016 |
| Harding's Estate's Ltd | Real estate | 2024 |
| Hardings Investments Ltd | Real estate | 2022 |
| Hardintone Court Management Company Limited | Households | 2012 |
| Hardman Holdings Limited | Real estate | 2019 |
| Hardstaff Linby Unlimited | Agriculture & fishing | 2011 |
| Hardware Connect Ltd | Information & communication | 2025 |
| Hardwell Projects Ltd | Construction | 2020 |
| Hardwick Facades Limited | Construction | 2025 |