| Hexadrive Ltd | Professional & scientific | 2024 |
| Hexagon PUB Company Ltd | Hospitality | 2017 |
| Hexakin Ltd | Hospitality | 2025 |
| Hexon Tech Ltd | Wholesale & retail | 2023 |
| Hextable Food and Wines Limited | Wholesale & retail | 2005 |
| HEY Listen Ltd | Administrative & support | 2022 |
| HEY Sugar Ltd | Manufacturing | 2022 |
| Heybridge Investments Ltd | Financial services | 2024 |
| Heybridge Ltd | Real estate | 2024 |
| Heyma Foods Limited | Hospitality | 2023 |
| Heyworth Properties Ltd | Real estate | 2017 |
| Heza Developments Limited | Real estate | 2022 |
| HF & Sons Ltd | Wholesale & retail | 2025 |
| HF Property Management Co Limited | Real estate | 2016 |
| HFR Ltd | Administrative & support | 2018 |
| Hfre Properties UK Ltd | Real estate | 2021 |
| HG Ilford Ltd | Real estate | 2026 |
| HG Investments Ltd | Real estate | 2012 |
| Hgcs Ltd | Administrative & support | 2023 |
| HGJ Limited | Education | 2019 |
| HH Traders Limited | Wholesale & retail | 2025 |
| HH Utilities Limited | Energy | 2025 |
| Hh&L Ltd | Real estate | 2022 |
| HHA Traders Ltd | Wholesale & retail | 2022 |
| Hhaauu Ltd | Wholesale & retail | 2026 |
| Hhalal Meat Limited | Wholesale & retail | 2024 |
| Hhbp Limited | Real estate | 2025 |
| HHH IT Consulting Ltd | Information & communication | 2020 |
| HHH Property & Management Services Ltd | Real estate | 2018 |
| HHH Support Ltd | Information & communication | 2015 |
| Hhhub Ltd | Wholesale & retail | 2026 |
| Hhmr Properties Ltd | Real estate | 2025 |
| HHT Marketing & Sales Management Limited | Professional & scientific | 2012 |
| Hhym Limited | Professional & scientific | 2024 |
| HI Enterprises (UK) Limited | Wholesale & retail | 2014 |
| HI Services & Solutions Limited | Wholesale & retail | 2025 |
| HI View Properties Ltd | Real estate | 2021 |
| Hi-Juice Limited | Professional & scientific | 1999 |
| Hi-Tech Pest Management Limited | Other services | 2013 |
| HI7 Property Services Limited | Real estate | 2020 |
| HIA Management Ltd. | Real estate | 2015 |
| Hiba Architecture Limited | Professional & scientific | 2025 |
| Hibaproperties Ltd | Real estate | 2025 |
| Hibb One Ltd | Real estate | 2025 |
| Hibba Traders Ltd | Wholesale & retail | 2020 |
| Hibi Rentals Ltd | Administrative & support | 2019 |
| Hidden Pearls Limited | Wholesale & retail | 2022 |
| Hide and Skin Ltd | Manufacturing | 2023 |
| Hideaway IG11 Ltd | Hospitality | 2021 |
| Hifm Advocates and Consultants Limited | Professional & scientific | 2025 |
| High Aims Training Limited | Administrative & support | 2017 |
| High Assets Management Ltd | Real estate | 2021 |
| High Calibre Training Limited | Administrative & support | 2023 |
| High Digital Solutions Ltd | Information & communication | 2022 |
| High Doner Ltd | Hospitality | 2025 |
| High Expectations Educational Services Ltd | Education | 2023 |
| High Grade Academy Limited | Other services | 2013 |
| High Hope for Equality | Health & social care | 2024 |
| High Lake Ltd | Real estate | 2025 |
| High Moon Glazing Ltd | Construction | 2026 |
| High Noon Management 2 Ltd | Real estate | 2023 |
| High Noon Management Ltd | Real estate | 2021 |
| High Point Recruitment Services Limited | Administrative & support | 2003 |
| High Quality Building Solution Ltd | Construction | 2020 |
| High Rise Builders Limited | Construction | 2013 |
| High Road (Loughton) Limited | Real estate | 2022 |
| High Road 7 Ltd | Real estate | 2016 |
| High Road Asset Management Ltd | Real estate | 2021 |
| High Road Motors Ltd | Wholesale & retail | 2024 |
| High Road Properties Ilford Limited | Real estate | 2014 |
| High Road Salon Ltd | Other services | 2025 |
| High Stone House Ltd | Real estate | 2024 |
| High Street South London Ltd | Construction | 2016 |
| High Tech Heating Ltd | Construction | 2015 |
| High Wheels Limited | Extraterritorial | 2019 |
| Higha Ltd | Wholesale & retail | 2026 |
| Highbeam House Freehold Limited | Households | 2020 |
| Highbright Academies Group Ltd | Education | 2020 |
| Highcliffe Investments Limited | Real estate | 2020 |
| Highendtraders Ltd | Wholesale & retail | 2023 |
| Higher Dimension Media Limited | Extraterritorial | 2013 |
| Higher Lakewood Bespoke Development LLP | | 2008 |
| Higher Standard Limited | Administrative & support | 2009 |
| Higherview Ltd | Administrative & support | 2022 |
| Highfield Fabrics Limited | Extraterritorial | 2024 |
| Highfield Investments and Properties Company Ltd | Real estate | 2023 |
| Highlands Gardens Lodge Ltd | Health & social care | 2017 |
| Highlands Global Ltd | Real estate | 2023 |
| Highlands Health Ltd | Health & social care | 2022 |
| Highlands Homes Limited | Real estate | 2020 |
| Highrise Home Management Ltd | Construction | 2026 |
| Highrise Limited | Real estate | 2017 |
| Highrise Trading Ltd | Real estate | 2021 |
| Highspec Trading (SE) Limited | Real estate | 2017 |
| Highspec Trading Limited | Extraterritorial | 2010 |
| Highstar Consulting Services Limited | Information & communication | 2016 |
| Hightech London Ltd | Real estate | 2024 |
| Highview Ltd | Construction | 2016 |
| Hiiba Limited | Hospitality | 2024 |
| Hijabi Serves CIC | Arts & recreation | 2026 |