| Handyman Home Ltd | Construction | 2019 |
| Hanford Contracts Ltd | Construction | 2021 |
| HANGAR61 Ltd | Hospitality | 2026 |
| Hanger Bristol Ltd | Hospitality | 2018 |
| Hangseng Barley Ltd | Other services | 2022 |
| Hanham Building Services Limited | Construction | 2013 |
| Hanham Community Centre (Bar and Trading Services) Limited | Hospitality | 2016 |
| Hanham Dental Laboratory Limited | Manufacturing | 2015 |
| Hanham Florists Limited | Wholesale & retail | 2016 |
| Hanham Foods Station Ltd | Hospitality | 2025 |
| Hanham Lodge Management Limited | Households | 2001 |
| Hanham Nails Ltd | Other services | 2018 |
| Hanham Property Ltd | Real estate | 2021 |
| Hanham Road Store Ltd | Wholesale & retail | 2026 |
| Hanham Shop Ltd | Wholesale & retail | 2025 |
| Hanham Stores Ltd | Wholesale & retail | 2024 |
| Haniyah Enterprise Limited | Health & social care | 2020 |
| Hankuk Composite UK Ltd | Wholesale & retail | 2020 |
| Hankyu Estate Ltd | Real estate | 2025 |
| Hanley Project Management Ltd | Professional & scientific | 2025 |
| Hann & Sons Property Ltd | Real estate | 2025 |
| Hann Roofing Ltd | Construction | 2023 |
| Hannah J Lewis Limited | Health & social care | 2021 |
| Hannah Miles Consultancy & Coaching Ltd | Professional & scientific | 2024 |
| Hannah Monaghan Ltd | Wholesale & retail | 2025 |
| Hannah Moore Design Ltd | Professional & scientific | 2025 |
| Hannah MRC Limited | Other services | 2025 |
| Hannah Stiles Art Ltd | Arts & recreation | 2025 |
| Hannah Williams and the Affirmations LLP | | 2020 |
| Hannah's Pet Portraits Ltd | Arts & recreation | 2025 |
| Hannam Fire & Security Ltd | Construction | 2023 |
| Hannans Horizon Ltd | Professional & scientific | 2026 |
| Hanney Welding Limited | Professional & scientific | 2014 |
| Hanover FOX (UK) Ltd | Professional & scientific | 2018 |
| Hans HK Limited | Wholesale & retail | 2025 |
| Hanse Media Ltd | Information & communication | 2022 |
| Hansom Hall Management Ltd | Households | 2025 |
| Hanson Recruitment Ltd | Administrative & support | 2022 |
| Hantang Ltd | Wholesale & retail | 2010 |
| Hanteck Ltd | Other services | 2018 |
| Hantex LP | | 2012 |
| Hanwey LLP | | 2010 |
| Hanzil Investments Ltd | Real estate | 2020 |
| HAO JIN Limited | Hospitality | 2026 |
| Haochi Limited | Hospitality | 2023 |
| Haouwse Limited | Real estate | 2025 |
| Haoxiang Ltd | Hospitality | 2025 |
| Haoxihao Limited | Real estate | 2022 |
| Haoyunlai Ltd | Hospitality | 2023 |
| Haplotec Limited | Professional & scientific | 2012 |
| Hapori Life Limited | Information & communication | 2018 |
| Hapori Wellbeing Ltd | Health & social care | 2021 |
| Happier Minds for Healthier Lives Ltd | Information & communication | 2026 |
| Happime Community Interest Company | Education | 2017 |
| Happiness Hotel Ltd | Hospitality | 2020 |
| Happiness Industries Ltd | Real estate | 2018 |
| Happy 4 U Ltd | Other services | 2024 |
| Happy Care Ltd | Health & social care | 2015 |
| Happy Courier Company Ltd | Transport & logistics | 2019 |
| Happy Days Dog Care Limited | Wholesale & retail | 2010 |
| Happy Earth Designs Ltd | Wholesale & retail | 2024 |
| Happy Eyes & Co Limited | Professional & scientific | 2019 |
| Happy Giraffe Games Limited | Information & communication | 2024 |
| Happy Haus Properties Ltd | Hospitality | 2021 |
| Happy Holdings Limited | Financial services | 2015 |
| Happy Hour Productions Limited | Information & communication | 2003 |
| Happy Living Investments Ltd | Real estate | 2025 |
| Happy Logistics Company Ltd | Transport & logistics | 2025 |
| Happy Mania Ltd | Wholesale & retail | 2020 |
| Happy Pants Ltd | Wholesale & retail | 2026 |
| Happy Paws Pet Solutions Ltd | Other services | 2024 |
| Happy PI Ltd | Wholesale & retail | 2026 |
| Happydigsproperties Ltd | Hospitality | 2024 |
| Happyscrolls Limited | Wholesale & retail | 2024 |
| Hapsford Limited | Agriculture & fishing | 1989 |
| Haque Capital Management Limited | Financial services | 2023 |
| Hara Building Limited | Construction | 2025 |
| Hara Properties Limited | Construction | 2016 |
| Harber Consulting Limited | Professional & scientific | 2018 |
| Harbie Investments Limited | Real estate | 2022 |
| Harbour 6 Limited | Arts & recreation | 2020 |
| Harbour Exchange Propco Limited | Real estate | 2007 |
| Harbour Family Law Limited | Professional & scientific | 2013 |
| Harbour Garage (Portishead) Limited | Wholesale & retail | 2014 |
| Harbour Hub Ltd | Hospitality | 2022 |
| Harbour Quay Limited | Hospitality | 2019 |
| Harbour Taverns Group Ltd | Financial services | 2025 |
| Harbour Training Ltd | Education | 2014 |
| Harbour Walk Management Company Limited | Households | 2002 |
| Harbour Way Surgery Limited | Health & social care | 2007 |
| Harbourne Power Limited | Energy | 2014 |
| Harbourside Chiropractic Centre Limited | Health & social care | 2008 |
| Harbourside Corporate Finance LLP | | 2021 |
| Harbourside Financial Ltd | Financial services | 2006 |
| Harbourside Haven Limited | Real estate | 2025 |
| Harbourside Limited | Real estate | 2020 |
| Harbourside Marina Limited | Hospitality | 1994 |
| Harbourside Property Group Ltd | Real estate | 2008 |
| Harbourstar Limited | Wholesale & retail | 2007 |
| Harbourview Estates Management Ltd | Real estate | 2025 |