| High House Consulting Ltd | Professional & scientific | 2024 |
| High Peak Hobbies Ltd | Wholesale & retail | 2026 |
| High Peaks Vintage Ltd | Wholesale & retail | 2025 |
| High Performance Foods Limited | Manufacturing | 2025 |
| High Spec Relocations Limited | Construction | 2019 |
| High Street Inns (Sutton) Limited | Hospitality | 2011 |
| Highbridge Fisheries Norfolk Ltd | Agriculture & fishing | 2022 |
| Higher Performance Consulting Ltd | Information & communication | 2024 |
| Highland Wealth Limited | Real estate | 2021 |
| Highland Wealth Management Limited | Professional & scientific | 2021 |
| Highmountain Film Ltd | Information & communication | 2017 |
| Highnet Communications Limited | Information & communication | 2016 |
| Highway Group Ltd | Financial services | 2023 |
| Hikmaah Ltd | Health & social care | 2025 |
| Hilali Productions Ltd | Information & communication | 2025 |
| Hilden's Brickwork and Landscaping Limited | Administrative & support | 2019 |
| Hilker Rose Limited | Financial services | 2024 |
| Hillingdon (Mansfield) Ltd | Administrative & support | 2014 |
| Hillman Investment Group Limited | Real estate | 2018 |
| Hills Lettings Management Ltd | Real estate | 2021 |
| Hillview Property Group Limited | Real estate | 2023 |
| Himakoad Ltd | Wholesale & retail | 2022 |
| Himek Company Limited | Construction | 2025 |
| Himmahx Ltd | Other services | 2025 |
| Hinks Consulting Ltd | Information & communication | 2015 |
| Hinton Solutions Limited | Financial services | 2024 |
| Hippy HUT Pottery Ltd | Manufacturing | 2022 |
| Hire Radio Ltd | Information & communication | 2018 |
| Hirst First Limited | Other services | 2020 |
| HIS Mercy HER Truth Ltd | Other services | 2023 |
| Histopathologist Ltd | Manufacturing | 2010 |
| Hitchcocks Mill Management Company Limited | Households | 2004 |
| Hive Mind Digital Marketing Ltd | Information & communication | 2024 |
| Hjcc Ltd | Professional & scientific | 2023 |
| HJG Group Ltd | Real estate | 2025 |
| HJH Consultants Limited | Professional & scientific | 2024 |
| HK Aldrovandi Limited | Wholesale & retail | 2018 |
| HKK Associates Ltd | Other services | 2015 |
| Hkkcc Holdings Ltd | Real estate | 2024 |
| HKL Arabia Limited | Wholesale & retail | 2024 |
| HKL Medical Services Ltd | Health & social care | 2023 |
| HL Air Conditioning Refrigeration & Plumbing Limited | Construction | 2017 |
| HL Oceanside Ltd | Health & social care | 2023 |
| HLC Property Ltd | Real estate | 2023 |
| HLF Rentals Limited | Real estate | 2023 |
| Hlfps | Other services | 2023 |
| HLM Stays Property Management Ltd | Real estate | 2026 |
| HLO Services Limited | Professional & scientific | 2024 |
| HM & SON Logistics Limited | Wholesale & retail | 2023 |
| HM Khaliq Consulting Ltd | Professional & scientific | 2025 |
| HM24 Ltd | Professional & scientific | 2025 |
| Hmdt Trading Ltd | Wholesale & retail | 2026 |
| HMH Advisory Limited | Professional & scientific | 2019 |
| HMH Golf & Leisure Limited | Arts & recreation | 2016 |
| Hmirror Ltd | Wholesale & retail | 2026 |
| Hmkitex Ltd | Information & communication | 2026 |
| HMW Studio Ltd | Professional & scientific | 2024 |
| Hoar & Co Limited | Construction | 2016 |
| Hoar Cross Day Nursery Limited | Education | 2006 |
| Hobam Ltd | Manufacturing | 2025 |
| Hobbira Stepflow Ltd | Wholesale & retail | 2026 |
| Hobby Health Ltd | Information & communication | 2023 |
| Hockley Developments (Basford Road) Limited | Administrative & support | 2017 |
| Hockley Developments (Holland Street) Limited | Construction | 2018 |
| Hoffmann Consultancy Limited | Professional & scientific | 2002 |
| Hola Solar Ltd | Energy | 2026 |
| Holbeck Rise Development Ltd | Construction | 2022 |
| Holborn Valve Engineering Limited | Manufacturing | 2007 |
| Holdfast Avionics Limited | Administrative & support | 2016 |
| Holdgrave Engineering Limited | Construction | 2011 |
| Holdings Three Limited | Financial services | 2018 |
| Holias Ltd | Wholesale & retail | 2023 |
| Holistic-Hands Care Services Ltd | Health & social care | 2020 |
| Holland Property Rentals Ltd | Real estate | 2020 |
| Holland Regal Flora Horticulture Co., Ltd | Wholesale & retail | 2025 |
| Hollandiia Ltd | Education | 2025 |
| Holliday Homes Ltd | Construction | 2023 |
| Hollings Capital Partners Limited | Real estate | 2025 |
| Holly House Cafe Limited | Hospitality | 2021 |
| Holly Lane Holdings Limited | Financial services | 2026 |
| Holly Lodge Gardens Ltd | Real estate | 2025 |
| Hols Home Limited | Real estate | 2023 |
| Holty Paws and Hooves Ltd | Administrative & support | 2019 |
| Home & Wares Limited | Wholesale & retail | 2024 |
| Home and Garden Heritage Limited | Professional & scientific | 2018 |
| Home Glow Property Services Ltd | Construction | 2025 |
| Home Health SL Ltd | Health & social care | 2022 |
| Home on ME Limited | Wholesale & retail | 2024 |
| Home Services Report Limited | Other services | 2023 |
| Home Store Limited | Administrative & support | 2005 |
| Home Ventures Limited | Real estate | 2023 |
| Home Workers & Garden Grafters LLP | | 2021 |
| Home World Ltd | Wholesale & retail | 2021 |
| HOME2CLEAN Limited | Administrative & support | 2026 |
| Homeawaylets Limited | Hospitality | 2023 |
| Homechoir | Information & communication | 2023 |
| Homed-Uk Ltd | Information & communication | 2025 |
| Homefield Property Investments Limited | Real estate | 2013 |
| Homelands House Properties Limited | Real estate | 2020 |
| Homelands House Services Limited | Administrative & support | 2012 |