| H & R Property Enterprises Ltd | Real estate | 2018 |
| H by Design Ltd | Other services | 2009 |
| H Cowley Ltd | Professional & scientific | 2023 |
| H Fraser Consulting Ltd | Professional & scientific | 2011 |
| H L Barbers Limited | Other services | 2022 |
| H L Spencer Ltd | Administrative & support | 2013 |
| H Pubs Limited | Hospitality | 2012 |
| H S Shergill Limited | Hospitality | 2022 |
| H Sanders Holdings Limited | Financial services | 2023 |
| H&J Property Group Ltd | Real estate | 2022 |
| H14 Enterprises Limited | Construction | 2014 |
| H2H Property Ltd | Real estate | 2023 |
| Hadley Gate Management Company Limited | Real estate | 2023 |
| Hadley Homes (Shropshire) Ltd | Real estate | 2026 |
| Hafod Construction Limited | Water & waste | 2002 |
| Hail Management Ltd | Wholesale & retail | 2021 |
| Hailzean Ltd | Wholesale & retail | 2009 |
| Hair 21 Limited | Other services | 2006 |
| Hair by Mary Limited | Other services | 2022 |
| Hair by Natalie Limited | Other services | 2003 |
| Hair Forum Ltd | Other services | 2022 |
| Hair in the Lane Ltd | Other services | 2017 |
| Halco Homes Limited | Manufacturing | 2015 |
| Halesfield Properties Limited | Real estate | 2007 |
| Halfway Car Wash & Tyres Ltd | Administrative & support | 2026 |
| Halfway Food Services Limited | Hospitality | 2023 |
| Hall Grange Investments Limited | Construction | 2024 |
| Hall Park Drive Management Company Limited | Administrative & support | 2016 |
| Hall Wateridge & Owen Limited | Real estate | 1987 |
| Hall's Court Maintenance Limited | Households | 2004 |
| Hallidayuk Ltd | Professional & scientific | 2022 |
| Hallmark Hospitality Limited | Hospitality | 2026 |
| Hallmark Properties Limited | Real estate | 2019 |
| Halls (2015) Limited | Real estate | 2015 |
| Halls 2008 Limited | Real estate | 1990 |
| Halls Cleaning Company Ltd | Administrative & support | 2013 |
| Halls Holdings Group Limited | Financial services | 2024 |
| Halls Holdings Limited | Real estate | 2008 |
| Halls Market Company Limited | Wholesale & retail | 2014 |
| Halls Participations Limited | Real estate | 2005 |
| Hallstone Keep Ltd | Financial services | 2025 |
| Halo Habitats Ltd | Real estate | 2024 |
| Halstat Limited | Manufacturing | 2024 |
| Hamco Developments Ltd | Professional & scientific | 2018 |
| Hamer Fencing Ltd | Agriculture & fishing | 2022 |
| Hamilton Court (Leicester) Management Company Limited | Households | 2002 |
| Hamilton Financial Options Limited | Financial services | 2011 |
| Hamilton Phase 3 and 4 (Leicester) Management Limited | Households | 2007 |
| Hammonds Catering Services Ltd | Hospitality | 2005 |
| Hammonds Harry Limited | Professional & scientific | 2016 |
| Hampton Hayes Kennels & Cabins Ltd | Agriculture & fishing | 2006 |
| Hands on the Hill Ltd | Manufacturing | 2023 |
| Hangar 18 Industries Limited | Professional & scientific | 2021 |
| Hangar Growers Limited | Agriculture & fishing | 2021 |
| Hanmart Windows and Doors Ltd | Construction | 2020 |
| Hanmer Auto Services Limited | Wholesale & retail | 2019 |
| Hanumantra Limited | Other services | 2014 |
| Happy Bricks Ltd | Real estate | 2021 |
| Happy Faces Day Care Nursery Ltd | Health & social care | 2007 |
| Happy IOT Ltd | Information & communication | 2025 |
| HAR Properties Ltd | Construction | 2017 |
| Harbour Lights "C" (Eastbourne) Management Company Limited | Households | 1991 |
| Harcourt Property Holdings Ltd | Construction | 2020 |
| Harding and Houlston Building Contractors Limited | Construction | 2016 |
| Harding and Houlston Developments Ltd | Real estate | 2025 |
| Harding Heating Ltd | Construction | 2023 |
| Harding Hydro Ltd | Professional & scientific | 2021 |
| Hardwicke Properties Limited | Construction | 1987 |
| Harecastle Limited | Real estate | 1999 |
| Harefield Business Consulting Ltd | Professional & scientific | 2014 |
| Haresbrook Park Limited | Health & social care | 2014 |
| Harish EYE Care Ltd | Health & social care | 2010 |
| Harmer Consultancy Ltd | Education | 2011 |
| Harmony Childcare Residential Homes Ltd | Health & social care | 2017 |
| Harmony Home Help Limited | Administrative & support | 2026 |
| Harnage Joinery Ltd | Manufacturing | 2023 |
| Harnham Technical Services Limited | Professional & scientific | 2025 |
| Harpcourt Limited | Real estate | 1989 |
| Harper - Bell Property Ltd | Real estate | 2025 |
| Harps Blasting Ltd | Wholesale & retail | 2025 |
| Harpton LLP | | 2025 |
| Harriet House Management Company Limited | Administrative & support | 2000 |
| Harriot Limited | Health & social care | 2014 |
| Harris & Benbow Ltd | Hospitality | 2026 |
| Harris & Gray Limited | Wholesale & retail | 2023 |
| Harris Wilderness Mowing Ltd | Agriculture & fishing | 2024 |
| Harrison & Harrison Craft Supplies Limited | Manufacturing | 2017 |
| Harrison Hardscape Solutions Ltd | Construction | 2026 |
| Harrison Lines Ltd | Transport & logistics | 2020 |
| Harrison Rose Bakery Ltd | Hospitality | 2025 |
| Harsim Ltd | Hospitality | 2021 |
| Hart's Hideaway Limited | Wholesale & retail | 2024 |
| Hartkind Ltd | Information & communication | 2025 |
| Hartley Storage Limited | Real estate | 2017 |
| Hartshill (Stoke) Management Company Limited | Real estate | 2017 |
| Hartshorns Limited | Construction | 2011 |
| Hartston Limited | Manufacturing | 1994 |
| Harvest Agronomy Limited | Administrative & support | 2013 |
| Harvey Lewis Consultancy Limited | Professional & scientific | 2017 |
| Harwards Property Ltd | Real estate | 2024 |