| Hollyoake Landscapes Limited | Administrative & support | 2018 |
| Hollywoofs K9’S Limited | Agriculture & fishing | 2024 |
| Holmz Limited | Wholesale & retail | 2024 |
| Holo Digital Ltd | Information & communication | 2017 |
| Holoscare Ltd | Health & social care | 2024 |
| Homdec Construction Limited | Construction | 2011 |
| Home and Away Property Group Ltd | Households | 2026 |
| Home Comfort Care Ltd | Administrative & support | 2020 |
| Homebreeders Limited | Real estate | 2021 |
| Homehaven Properties Limited | Real estate | 2026 |
| Homehero Services Ltd | Construction | 2025 |
| Homeless in Need UK C.I.C. | Health & social care | 2024 |
| Homeopathic Medical Associates Limited | Health & social care | 2001 |
| Homeopathic Medical Association | Other services | 2024 |
| Homepass Ltd | Hospitality | 2021 |
| Homnix Ltd | Construction | 2026 |
| Honest People Interior Limited | Construction | 2016 |
| Hongming Gravesend Limited | Hospitality | 2024 |
| Hoodini Limited | Real estate | 2024 |
| Hook Place Farm Management Company Limited | Households | 2016 |
| Hope Charles Properties Limited | Real estate | 2017 |
| Hope Financial Planning Solutions Ltd | Financial services | 2016 |
| Hope Springs Services Limited | Health & social care | 2024 |
| Hoperising Healthcare Limited | Administrative & support | 2020 |
| Hopevine Estate Ltd | Real estate | 2020 |
| Hopevine Limited | Health & social care | 2010 |
| Hopler Ltd | Wholesale & retail | 2017 |
| Horgan Business Group Ltd | Information & communication | 2025 |
| Horizia Limited | Information & communication | 2024 |
| Horizon 112 Ltd | Professional & scientific | 2022 |
| Horse & Fish Mobiles Ltd | Wholesale & retail | 2022 |
| Horse Cleaning Ltd | Manufacturing | 2019 |
| Horticultural Works Ltd | Wholesale & retail | 2008 |
| Horton Kirby Developments Ltd | Construction | 2023 |
| Hosanee & SON Limited | Health & social care | 2007 |
| Hot ROD Diner Limited | Hospitality | 2013 |
| Hot Wing Holdings Bexley Village Ltd | Hospitality | 2024 |
| Hotka Services Limited | Construction | 2012 |
| Hour of Grace Ministry International Ltd. | Administrative & support | 2018 |
| House of Ahluwalia Limited | Health & social care | 2022 |
| House of India Limited | Wholesale & retail | 2023 |
| House of Leyla Ltd | Other services | 2022 |
| House of Mojo Limited | Other services | 2007 |
| House of TOJ Ltd | Other services | 2024 |
| House of Women UK CIC | Health & social care | 2024 |
| Hovista Ltd | Hospitality | 2026 |
| HPS Group Services Ltd | Construction | 2020 |
| HQ Building Ltd | Transport & logistics | 2015 |
| HRA Property Ltd | Real estate | 2025 |
| Hrdya Ltd | Professional & scientific | 2026 |
| HRS Afrofresh Market Ltd | Wholesale & retail | 2025 |
| Hrxpertize Ltd | Information & communication | 2025 |
| HS Apex Ventures Ltd | Administrative & support | 2023 |
| HS Bhalru Construction Ltd | Construction | 2025 |
| HS Homes Estates Agency Limited | Real estate | 2004 |
| Hskb Designs Ltd | Professional & scientific | 2021 |
| HSL Financial Ltd | Financial services | 2024 |
| HST Management Limited | Professional & scientific | 2010 |
| HTS Motors Ltd | Wholesale & retail | 2026 |
| Htsr Holding Ltd | Real estate | 2024 |
| Huba Construction Ltd | Construction | 2007 |
| Hubini Ltd | Wholesale & retail | 2026 |
| Huda Barber Limited | Other services | 2023 |
| Hughes PO Ltd | Real estate | 2024 |
| Hughesy Education & Property LLP | | 2023 |
| Hughesy Education Ltd | Professional & scientific | 2022 |
| Hukamra Ltd | Information & communication | 2026 |
| Humanettiq Limited | Education | 2021 |
| Humber Enterprises Ltd | Construction | 2022 |
| Hundal Consultancy Limited | Other services | 2025 |
| Hundal Formworks Ltd | Construction | 2015 |
| Hunts Farm Management Company Limited | Households | 1984 |
| Hunyad Transport Ltd | Transport & logistics | 2017 |
| Hussain Brothers London Ltd | Real estate | 2021 |
| Hussey RJE Ltd | Professional & scientific | 2025 |
| Hutchfield Furniture Limited | Other services | 2016 |
| HV Power Services Ltd | Professional & scientific | 2018 |
| HW Event Consultancy Limited | Professional & scientific | 2015 |
| Hyddy Limited | Agriculture & fishing | 2019 |
| Hyddy Properties Limited | Real estate | 2024 |
| Hyde Building Property Ltd | Real estate | 2025 |
| Hygge Music Company Ltd | Information & communication | 2021 |
| Hygieia Homes & Gardens Ltd | Administrative & support | 2023 |
| Hygieia Property Ltd | Real estate | 2026 |
| HYO Consultancy Ltd | Information & communication | 2016 |
| Hyphen Building Solutions Ltd | Construction | 2026 |
| I & M Property Solutions Limited | Real estate | 2020 |
| I & S Hold Ltd | Hospitality | 2023 |
| I AM Fbls Ltd | Other services | 2019 |
| I&C Construction Ltd | Construction | 2024 |
| I&G Property Group Ltd | Real estate | 2025 |
| I&G Property Investment Ltd | Real estate | 2024 |
| I&N Construction Ltd | Construction | 2018 |
| I. M. Izvoran Rendering Ltd | Construction | 2018 |
| I.D.S - International Delivery Service Ltd | Transport & logistics | 2019 |
| I.M.C Goods Transportation Service Provider Limited | Transport & logistics | 2021 |
| I.O.E Events Ltd | Professional & scientific | 2013 |
| I2 Ventures Ltd | Information & communication | 2025 |
| IAN Robertshaw Limited | Professional & scientific | 2008 |
| IAP Advisory Limited | Professional & scientific | 2026 |