| Hartley Trading Co Ltd | Wholesale & retail | 2022 |
| Harvey Court RTM Company Limited | Households | 2019 |
| Hasan Shikh Kilo Ltd | Wholesale & retail | 2017 |
| Hastings Moores Ltd | Financial services | 2020 |
| HAT Marketing Limited | Administrative & support | 2008 |
| Hatheway Homes Limited | Construction | 2014 |
| Hatty's Sweet Shop Limited | Wholesale & retail | 2023 |
| Haus & Wick Ltd | Wholesale & retail | 2025 |
| Haven Care Providers Limited | Health & social care | 2025 |
| Havens and Homes Ltd | Households | 2020 |
| Havercourt Residents Association Limited | Other services | 1956 |
| Haverley Freehold Limited | Real estate | 1998 |
| Haverley Management Limited | Households | 1994 |
| Haydots Ltd | Information & communication | 2025 |
| Hayes Acuity Limited | Professional & scientific | 2025 |
| Hayes Intelligence Consulting Ltd | Information & communication | 2025 |
| Hayjey Foods Limited | Hospitality | 2025 |
| Haysol Ltd | Information & communication | 2025 |
| Haystoun House Management Limited | Households | 1988 |
| Hayward Young Consulting Limited | Professional & scientific | 2022 |
| Hazella Ltd | Wholesale & retail | 2024 |
| HB Lettings UK Limited | Real estate | 2021 |
| HB Mustangs Ltd | Wholesale & retail | 2018 |
| HB Online Accounting Limited | Professional & scientific | 2022 |
| HBS Construct Ltd | Construction | 2023 |
| HCS Management Limited | Households | 2018 |
| HE and Partners Limited | Professional & scientific | 2020 |
| Head Candi Limited | Other services | 2009 |
| Head Over Heels Entertainment Ltd | Arts & recreation | 2020 |
| Headly Automotive Ltd | Wholesale & retail | 2025 |
| Heads UP Barbers Limited | Other services | 2013 |
| Heads UP Investments Limited | Real estate | 2026 |
| Health 2 Fitness Limited | Wholesale & retail | 2005 |
| Health Club Acquisitions Limited | Administrative & support | 2001 |
| Health Club Investments Group Limited | Professional & scientific | 2001 |
| Health Club Investments Limited | Administrative & support | 2001 |
| Health Value Alliance and Systems Ltd | Information & communication | 2021 |
| Healthcare First Ltd | Administrative & support | 2023 |
| Healthscore Limited | Health & social care | 2013 |
| Healthy Safe Work Limited | Health & social care | 2022 |
| Heart Matters Limited | Education | 2014 |
| Heartmath Ltd | Professional & scientific | 2010 |
| Heartwood Food Trading Limited | Wholesale & retail | 2024 |
| Heat Dragon Ltd | Construction | 2023 |
| HEAT4FEET Limited | Extraterritorial | 2024 |
| Heath Buildings Limited | Real estate | 2020 |
| Heath Farm DIY Limited | Financial services | 2020 |
| Heathdene Limited | Information & communication | 2012 |
| Heathview Court Limited | Households | 1992 |
| Heavy Pencil Training Limited | Arts & recreation | 2006 |
| Hedera International Limited | Administrative & support | 2018 |
| Hedman Finance Limited | Financial services | 2022 |
| Hedona Global Finds Ltd | Wholesale & retail | 2024 |
| Heduco Ltd | Professional & scientific | 1909 |
| Heffernan Properties Limited | Households | 2019 |
| Heilo Care and Support Limited | Administrative & support | 2025 |
| Helios E-Commerce Ltd | Wholesale & retail | 2023 |
| Helios Electrical Install Limited | Construction | 2015 |
| Heliosphere Consulting Limited | Professional & scientific | 2022 |
| Helm Managed Services Ltd | Information & communication | 2026 |
| Henan Financial Services 2 Ltd | Information & communication | 2024 |
| Hendon Brook Consulting Limited | Professional & scientific | 2013 |
| Hendra Consultancy Ltd | Administrative & support | 2020 |
| Henfield Consulting Ltd | Administrative & support | 2019 |
| Hengate Homes Limited | Wholesale & retail | 2024 |
| Henlee Consultants Limited | Professional & scientific | 2013 |
| Hennessey Maintenance Ltd | Construction | 2023 |
| Hennessy Property Ventures Ltd | Real estate | 2025 |
| Henor Advisory Ltd | Professional & scientific | 2025 |
| Henri L.Jaccaz & Co. Limited | Wholesale & retail | 2002 |
| Henwill Consultants Limited | Professional & scientific | 2015 |
| Hepta Plumbing & Heating Ltd | Construction | 2023 |
| Here & Beyond Ltd | Information & communication | 2024 |
| Heroes and Legends Games Ltd | Extraterritorial | 2010 |
| Heron Interiors Limited | Construction | 2011 |
| Herra Hair Care Limited | Wholesale & retail | 2010 |
| Herstal Groundwork Ltd | Construction | 2016 |
| Heska U.K. Ltd | Wholesale & retail | 2023 |
| Hessel Enterprises Ltd | Professional & scientific | 2024 |
| Hessle Grove Limited | Real estate | 1996 |
| HG Assurance Limited | Professional & scientific | 2023 |
| HGM Sales Ltd | Wholesale & retail | 2025 |
| HGS Cascais Limited | Professional & scientific | 2023 |
| Hickson Communications Ltd | Information & communication | 2011 |
| High Level Drive Express Ltd | Wholesale & retail | 2011 |
| High Riggs Solution Ltd | Construction | 2015 |
| High Spirits Bars Limited | Hospitality | 2003 |
| Higher Level Solutions Ltd | Construction | 2021 |
| Highgate Hospital LLP | | 2011 |
| Highgate Pathways Ltd | Wholesale & retail | 2017 |
| Highlands Gate Management Company Limited | Households | 2000 |
| Highline Domestic Services Ltd | Administrative & support | 2013 |
| Highview (Bordon) Limited | Real estate | 1989 |
| Hikapee Ltd. | Arts & recreation | 2016 |
| Hill Park Property Ltd | Real estate | 2013 |
| Hillbrow Court (Esher) Residents Association Limited | Households | 1964 |
| Hillcrest & Sunridge Services Limited | Professional & scientific | 2017 |
| Hillside Holdings Limited | Health & social care | 1988 |
| Hillside Hospital Limited | Health & social care | 1988 |
| Hillside Motors Limited | Wholesale & retail | 2004 |