| Heritage Sweets Ltd | Wholesale & retail | 2025 |
| Hermanos Ojeda Ltd | Real estate | 2026 |
| Hernmoss Limited | Households | 1973 |
| Hero Handyman Building Services Limited | Construction | 2019 |
| Heronden Grange Management Company Limited | Households | 2019 |
| Heronsbank Management Limited | Households | 2004 |
| Heronsbrook (Minster) Management Company Limited | Households | 2009 |
| Herron Controls Ltd | Construction | 2025 |
| Hertford Capital Ltd | Real estate | 2017 |
| Herty's Hair Salon Ltd | Other services | 2014 |
| Heru Limited | Information & communication | 2026 |
| Hespari Ltd | Construction | 2021 |
| Hestia Asset Management Ltd. | Health & social care | 2005 |
| HET Distributions Ltd | Wholesale & retail | 2026 |
| Hexad Holdings Limited | Extraterritorial | 2021 |
| Hexfn Limited | Wholesale & retail | 2025 |
| Hexpress Global Ltd | Health & social care | 2017 |
| Hexpress Healthcare Limited | Manufacturing | 2011 |
| Heytradesmen Ltd | Information & communication | 2026 |
| HF 2 Properties Ltd | Real estate | 2023 |
| HF16 Limited | Professional & scientific | 2005 |
| HF17 Ltd | Education | 2017 |
| HFB 888 Limited | Hospitality | 2025 |
| HFMPROPERTY8 Ltd | Real estate | 2026 |
| HFR Traders Ltd | Wholesale & retail | 2020 |
| HFR Wood Green Ltd | Hospitality | 2024 |
| HGS Convenience Limited | Wholesale & retail | 2014 |
| HGV Security Limited | Wholesale & retail | 2016 |
| HH Wolesale 95 Limited | Wholesale & retail | 2025 |
| HHK Ltd | Information & communication | 2018 |
| Hi-Tek Interface Limited | Wholesale & retail | 1991 |
| Hickman-Jones Limited | Other services | 2008 |
| Hickmet Investments Ltd | Real estate | 2021 |
| Hicks London Ltd | Other services | 2022 |
| Hicks of Chelsea Ltd | Other services | 2020 |
| High Lane Management Limited | Households | 2008 |
| High Life (GB) Ltd | Wholesale & retail | 2014 |
| High Life Developments Limited | Real estate | 2017 |
| High Life Investments Limited | Real estate | 2017 |
| High Life Property Limited | Real estate | 2017 |
| High Mount Flat Management Limited | Households | 1988 |
| High Tech Electric and Constructions Ltd | Construction | 2019 |
| High TOR Close Management Limited | Households | 1998 |
| High Trees (Freehold) Company Limited | Households | 2009 |
| Highbank Grange (Bolton) Residents Association Limited | Households | 2001 |
| Highbrook House Residents Association Limited | Households | 1994 |
| Highbrook Park (Hambrook) Management Company Limited | Households | 2013 |
| Highbury Arts Club Ltd | Hospitality | 2013 |
| Higher Heights Properties Limited | Real estate | 2025 |
| Higher Level Care Limited | Hospitality | 1995 |
| Higher Standards Cleaning Services Ltd | Administrative & support | 2023 |
| Highfield Court Evens (Farnworth) RTM Company Ltd | Households | 2012 |
| Highfield Court Odds (Farnworth) RTM Company Ltd | Households | 2012 |
| Highfield Residents Association (Shepperton) Ltd | Households | 2006 |
| Highfields Property Solutions Ltd | Construction | 2025 |
| Highgate Imagerie Ltd | Professional & scientific | 2021 |
| Highlander Properties Limited | Construction | 2006 |
| Highlands 2 Management Company Limited | Households | 1998 |
| Highmead (Maintenance) Limited | Households | 1977 |
| Highview (Caterham) Limited | Households | 1994 |
| Highview Group (Kent) Limited | Financial services | 2023 |
| Highway Pictures Ltd | Information & communication | 2018 |
| Highwood Green Management Company Limited | Households | 2014 |
| Hijk Living Ltd | Wholesale & retail | 2026 |
| Hilary Court Management Company Limited | Households | 1987 |
| Hildenborough Square Limited | Hospitality | 2019 |
| Hilites Group Ltd | Water & waste | 2014 |
| Hill Close (Emersons Green) Management Limited | Households | 2014 |
| Hill Court Romford Management Limited | Households | 1970 |
| Hill Flats Management Company Limited | Households | 1983 |
| Hill House Bromley Management Limited | Households | 1998 |
| Hill Tree House Limited | Households | 2011 |
| Hill View Dental Practice Limited | Health & social care | 2010 |
| Hilland Consulting Limited | Professional & scientific | 2022 |
| Hillbury Fields (Ticehurst) Management Company Limited | Households | 2021 |
| Hillclough View Management Company Limited | Households | 2005 |
| Hillcrest Productions Limited | Information & communication | 2014 |
| Hillcross Management Limited | Households | 2001 |
| Hilldown Court Limited | Households | 2000 |
| Hilldown Court Management Limited | Households | 1978 |
| Hillgate Place Residents Limited | Real estate | 1997 |
| Hillground Gardens Management Company (South Croydon) Limited | Administrative & support | 2010 |
| Hilliard Court Management Company Limited | Households | 1979 |
| Hillingdon Properties Limited | Construction | 2019 |
| Hills Roofing Ltd | Manufacturing | 2021 |
| Hillside Care Recruitment Limited | Health & social care | 2018 |
| Hillside House (Frome) Limited | Households | 1993 |
| Hillside Park Linton Management Company Limited | Households | 2020 |
| Hillsmaintenance&Repairs Ltd | Construction | 2026 |
| Hillview Gardens Management Company Limited | Real estate | 2015 |
| Hillview Healthcare Service Limited | Health & social care | 2023 |
| Hilton FM Ltd | Professional & scientific | 2026 |
| Himalayan Exotics Ltd | Wholesale & retail | 2025 |
| Himley Green Residents Company Limited | Households | 1969 |
| Hinayat Ltd | Wholesale & retail | 2022 |
| Hinde Property Holding Limited | Construction | 1936 |
| Hinkcroft Group Limited | Professional & scientific | 2003 |
| Hinkcroft Limited | Real estate | 1980 |
| HIP Hopera UK CIC | Education | 2020 |
| Hira Hassan PVT Ltd | Other services | 2022 |