| Hemel Logistics Ltd | Transport & logistics | 2023 |
| Hemmens LLP | | 2017 |
| Henderson Services LLP | | 2001 |
| Henily Limited | Professional & scientific | 2009 |
| Henlow Cleaning Solutions Limited | Administrative & support | 2026 |
| Hennellys Plumbing and Heating Services Limited | Construction | 2009 |
| Henrall Property and Developments Ltd | Construction | 2022 |
| Henrypat Limited | Other services | 2025 |
| Hephzibah Support UK Limited | Health & social care | 2023 |
| HER Empire Lifestyle Ltd | Wholesale & retail | 2020 |
| Herbert and Herbert Pharmacy Limited | Wholesale & retail | 2017 |
| Herbert Walton Limited | Wholesale & retail | 2015 |
| Hercules Entertainment Recreational Creatives Ltd | Arts & recreation | 2025 |
| Herd Bar & Dining Rooms Ltd | Hospitality | 2025 |
| Herhouse Management Ltd | Real estate | 2025 |
| Heritage Building Consultants Ltd | Professional & scientific | 2026 |
| Heritage Collective UK Ltd | Extraterritorial | 2019 |
| Heritage Dental Care Ltd | Health & social care | 2022 |
| Heritage Electrical Limited | Construction | 2022 |
| Heritage Estate Management Services Ltd | Real estate | 2026 |
| Heritage F1 Limited | Extraterritorial | 2019 |
| Heritage Heating Group Ltd | Construction | 2024 |
| Heritage Power Limited | Construction | 2013 |
| Heritage Property Portfolio Ltd | Real estate | 2025 |
| Hero Medical Services International Ltd | Health & social care | 2022 |
| Hero Products Ltd | Wholesale & retail | 2023 |
| Heroes Haulage & Removals Ltd | Transport & logistics | 2025 |
| Heron Heights (Bedford) Management Company Limited | Households | 1972 |
| Heron House (Bedford) Limited | Real estate | 2014 |
| Heron Quay (1-22) RTM Company Limited | Households | 2020 |
| Heron Quay (23-26) RTM Company Limited | Households | 2020 |
| Heron Quay (27-30) RTM Company Limited | Households | 2020 |
| Heron Quay (31-53) RTM Company Limited | Households | 2020 |
| Heronaim Limited | Extraterritorial | 1985 |
| HEROTECH8 Ltd | Professional & scientific | 2016 |
| Herry Direct Ltd | Transport & logistics | 2026 |
| Hexagon Property Group Limited | Real estate | 2020 |
| Hexen Consulting Ltd | Professional & scientific | 2019 |
| Hextons Law Ltd | Professional & scientific | 2024 |
| HEY Jotty Ltd | Information & communication | 2025 |
| HGH Travel Ltd | Administrative & support | 2025 |
| HH Care and Teach Ltd | Education | 2021 |
| HH Motors Ltd | Wholesale & retail | 2026 |
| HH Structures Limited | Professional & scientific | 2022 |
| HI Fire and Security Solutions Ltd | Construction | 2022 |
| HI Lighting Limited | Construction | 2026 |
| Hi-Design Sign Services Ltd | Administrative & support | 2009 |
| Hi-Ed International Limited | Education | 2023 |
| HIA Associates Ltd | Real estate | 2025 |
| Hiah Ltd | Wholesale & retail | 2024 |
| Hiba Property Investments Ltd | Real estate | 2023 |
| Hickey Advisory Limited | Professional & scientific | 2013 |
| Hickman Consult Limited | Professional & scientific | 2019 |
| HID Autos Ltd | Wholesale & retail | 2019 |
| Hidden Health Ltd | Health & social care | 2022 |
| High Grade Solutions Limited | Information & communication | 2023 |
| High Noon Hospitality Services Ltd | Hospitality | 2020 |
| High Performing HR Ltd | Administrative & support | 2022 |
| High Reach Fitness Ltd | Wholesale & retail | 2023 |
| High Road Estates Limited | Real estate | 2014 |
| High Speed Models Limited | Wholesale & retail | 2011 |
| High Street Great Paxton Ltd | Construction | 2020 |
| High Street Southoe Ltd | Construction | 2022 |
| High Temperature Smallwares Limited | Wholesale & retail | 2014 |
| High Tide Ventures Ltd | Wholesale & retail | 2025 |
| High-Through Properties Limited | Financial services | 2025 |
| Highbury Park Systems Ltd | Information & communication | 2026 |
| Highcastle Lettings Ltd | Real estate | 2025 |
| Higher Level Maintenance Ltd | Construction | 2022 |
| Highfield Investment Group Limited | Real estate | 2020 |
| Highfield Property Management Limited | Households | 1990 |
| Highfields Court RTM Company Limited | Households | 2008 |
| Highgate Brewery Ltd | Manufacturing | 2025 |
| Highland Nexus Solutions Ltd | Real estate | 2024 |
| Highland Scientific Limited | Wholesale & retail | 2026 |
| Highpoint Care Plus Ltd | Administrative & support | 2023 |
| Highpoint Construction Limited | Construction | 2019 |
| Highway Security Ltd | Administrative & support | 2021 |
| Hijack Group Limited | Information & communication | 2017 |
| Hijack Prod. Limited | Information & communication | 2025 |
| Hilbre Grange Residents Limited | Households | 1983 |
| Hiline Abseiling Limited | Construction | 2000 |
| Hillco Investments (UK) Limited | Administrative & support | 2007 |
| Hilliard Properties Limited | Real estate | 2022 |
| Hillier Hill Limited | Wholesale & retail | 2006 |
| Hilliers Legal Services Limited | Professional & scientific | 2011 |
| Hillink Limited | Financial services | 2022 |
| Hills Plumbing & Heating Limited | Construction | 2021 |
| Hillstone Grange Residents Association Limited | Households | 1984 |
| Hillsworth Group Limited | Construction | 2022 |
| Hillsworth Investments Ltd | Information & communication | 2022 |
| Hillten Health Ltd | Wholesale & retail | 2023 |
| Hillten Holdings Ltd | Financial services | 2023 |
| Hillten Trading Limited | Professional & scientific | 2020 |
| Hillton PCN Ltd | Health & social care | 2021 |
| Hilohi Complex Software Connections Ltd | Information & communication | 2025 |
| Hilton Edwards Limited | Households | 2025 |
| Himalayan Masters UK Ltd | Hospitality | 2025 |
| Hindsight HR Ltd | Professional & scientific | 2015 |
| Hindustan PVT Limited | Wholesale & retail | 2025 |