| Hayes END Healthcare Limited | Wholesale & retail | 2022 |
| Hayes MOT Centre Ltd | Wholesale & retail | 2026 |
| Haymill Heating Ltd | Construction | 2019 |
| Hazard Sure Limited | Professional & scientific | 2025 |
| HD Gilding & Decorating Ltd | Construction | 2018 |
| Hdbarot Limited | Information & communication | 2026 |
| Head Tailor Hair & Beauty Salon Limited | Other services | 2018 |
| Headway Global Limited | Wholesale & retail | 2025 |
| Healthcare 360 Limited | Health & social care | 2003 |
| Healthcarealexis Ltd | Health & social care | 2022 |
| Healthy Visions Ltd | Hospitality | 2016 |
| Hearts in the Community CIC | Health & social care | 2025 |
| Heath Real Estate Limited | Real estate | 2022 |
| Heathrow Limo Hire Limited | Administrative & support | 2022 |
| Heaven Holidays Ltd | Transport & logistics | 2022 |
| Hecker Ltd | Wholesale & retail | 2020 |
| Heeba Real Estates Limited | Real estate | 2003 |
| Heils Bakery Lowestoft Ltd | Manufacturing | 2026 |
| Heka World Limited | Information & communication | 2025 |
| Helas Contractors Limited | Construction | 2019 |
| Helnay Ltd | Extraterritorial | 2023 |
| HELP2SURVIVE Limited | Health & social care | 2020 |
| Helterskelter. Label Ltd | Information & communication | 2025 |
| Henik Limited | Transport & logistics | 2025 |
| Hepco Limited | Construction | 2008 |
| Herb Fresh Limited Liability Partnership | | 2006 |
| Herbal AID Health Ltd | Health & social care | 2021 |
| Herbal AID Limited | Health & social care | 2009 |
| Herbal Clinician Ltd | Manufacturing | 2024 |
| Heritage Skin & Health Limited | Other services | 2025 |
| Hermoji Limited | Information & communication | 2016 |
| Hero Car Club Ltd | Wholesale & retail | 2023 |
| Hero Estate Investments Ltd | Real estate | 2026 |
| Hero Supplements Ltd | Wholesale & retail | 2018 |
| Hexagon Trading Limited | Wholesale & retail | 2000 |
| HEY Hospitality Limited | Hospitality | 2026 |
| HFW Naturals Ltd | Wholesale & retail | 2019 |
| HGV Finance Specialists Ltd | Financial services | 2022 |
| HGV Mechanic Services Ltd | Construction | 2024 |
| HHJ Property Investment Limited | Real estate | 2020 |
| HI - Spec Build Ltd | Construction | 2010 |
| Hibernian Brokers ( L & P) Limited | Financial services | 2003 |
| Hide Road Limited | Real estate | 2016 |
| High Assistance Limited | Administrative & support | 2009 |
| High Point Solutions Limited | Manufacturing | 2011 |
| Highbrow Limited | Information & communication | 2015 |
| Highdecora Furnishing Limited | Manufacturing | 2022 |
| Highfive Horizons Ltd | Wholesale & retail | 2025 |
| Highflyer Global Innovations (UK) Limited | Information & communication | 2021 |
| Highpost Ltd | Administrative & support | 2017 |
| Highvolt Construction Ltd | Construction | 2025 |
| Hijama for Females Ltd | Health & social care | 2025 |
| Hillcrest Logistics Ltd | Construction | 2020 |
| Hillcrest Transport Ltd | Transport & logistics | 2024 |
| Hillcrest UK Group Ltd | Real estate | 2025 |
| Hillier Electrical Limited | Construction | 2001 |
| Hillrise Assets Ltd | Real estate | 2023 |
| Hinge & Bracket (Builders) Limited | Construction | 1991 |
| Hioner Investments Limited | Construction | 1964 |
| Hirva Holdings Ltd | Real estate | 2026 |
| Hive Contracting and Trading Ltd | Construction | 2019 |
| HK Accounts Ltd | Professional & scientific | 2016 |
| HL Consultancy Ltd | Information & communication | 2025 |
| Hlff Consultants Ltd | Professional & scientific | 2026 |
| HM Bams Limited | Real estate | 2022 |
| Hmbg Ltd | Construction | 2012 |
| Hmbt Ltd | Construction | 2025 |
| Hmdevelopmentslondon Limited | Construction | 2024 |
| HMF Solution Ltd | Construction | 2016 |
| Hobbstech Limited | Information & communication | 2020 |
| Holistix Fitness Limited | Arts & recreation | 2018 |
| Holistix Sportswear Ltd. | Wholesale & retail | 2024 |
| Home 4 YOU (Hull) Ltd | Real estate | 2022 |
| Home Call Limited | Other services | 2019 |
| Home Doctr Limited | Construction | 2021 |
| Home for Supper Ltd | Other services | 2024 |
| Home Leisure Direct Holdings Limited | Financial services | 2019 |
| Home Supplies Direct Ltd | Wholesale & retail | 2016 |
| HOME2HOME Removals Ltd | Transport & logistics | 2019 |
| Homehous Ltd | Construction | 2020 |
| Homes Engineering Ltd | Real estate | 2024 |
| Homesdailyrent Limited | Real estate | 2025 |
| Homiq London Ltd | Real estate | 2025 |
| Honest Driving School Limited | Education | 2022 |
| Honeybee Homes Ltd | Information & communication | 2024 |
| Honormoses Ltd | Other services | 2019 |
| Hooops Ltd | Hospitality | 2019 |
| Hope Community Church (West London) | Other services | 2005 |
| Hope Therapeutic Services Limited | Health & social care | 2025 |
| Hopon Cars Ltd | Transport & logistics | 2024 |
| Horatio Hirst Ltd | Arts & recreation | 2025 |
| Horizon Connect Limited | Administrative & support | 2025 |
| Horizon Link Limited | Manufacturing | 2022 |
| Horizon Sunrise Ltd | Construction | 2014 |
| Horizon VIP International Ltd | Transport & logistics | 2025 |
| Horsenden Farm Moorings Ltd | Households | 2024 |
| Horsenden Hill Activity Centre Limited | Arts & recreation | 2016 |
| House of Astra Limited | Professional & scientific | 2026 |
| House of Boba Ltd | Hospitality | 2026 |
| House of Kaolin Ltd | Manufacturing | 2023 |