| Heaven Slice Limited | Hospitality | 2024 |
| Hedgemans Property Limited | Households | 2005 |
| Hedonia Limited | Health & social care | 2023 |
| Helena Court (Elstow) Management Company Limited | Households | 2016 |
| Helium 3 Design Limited | Professional & scientific | 2010 |
| Hellas Productions Limited | Arts & recreation | 2018 |
| Hello Books Limited | Information & communication | 2020 |
| Helmers Field (Chillington) Management Company Limited | Households | 2010 |
| Help Academy Limited | Administrative & support | 2010 |
| Help for Heroes | Education | 2007 |
| Help for Heroes Trading Limited | Wholesale & retail | 2007 |
| Hemingford Court Management Company Limited | Households | 2015 |
| Hemingways Consulting Ltd | Professional & scientific | 2002 |
| Hempstead Management Limited | Households | 2018 |
| HEN House HQ LLP | | 2014 |
| Henderson's Artisan Bakery Ltd | Wholesale & retail | 2012 |
| Henley Gardeners Limited | Administrative & support | 2009 |
| Henry Construction (Southern) Limited | Construction | 2016 |
| Henry Hunt Photography Ltd | Professional & scientific | 2018 |
| HER Becoming Limited | Wholesale & retail | 2025 |
| Heritage Gardening Ltd. | Administrative & support | 2016 |
| Heritage Investments Partners Limited | Real estate | 2024 |
| Heritage Park (Tamebridge) Management Company Limited | Households | 2002 |
| Heritage Parts Program Ltd | Wholesale & retail | 2026 |
| Heritage Plasterwork & Rendering Ltd | Construction | 2021 |
| Heritage Property Partners Ltd | Real estate | 2024 |
| Heritage Resource Management Limited | Information & communication | 2015 |
| Hero Tech Support Ltd | Other services | 2018 |
| Herp Xotics Ltd | Manufacturing | 2019 |
| Herring Limited | Professional & scientific | 2015 |
| Herringston Estate Trustees (NO. 1) Limited | Extraterritorial | 2014 |
| Herringston Estate Trustees (NO. 2) Limited | Extraterritorial | 2014 |
| Hersnmine Developments Ltd | Construction | 2018 |
| Heseltine Carp Limited | Manufacturing | 2003 |
| HET Investments Limited | Professional & scientific | 2011 |
| Hetre Limited | Wholesale & retail | 2004 |
| Hettie Bells Limited | Hospitality | 2024 |
| Hettie Bells Rooms Limited | Hospitality | 2024 |
| Heybetsy Ltd | Agriculture & fishing | 2021 |
| HF Salisbury Limited | Hospitality | 2023 |
| HGS Metering Limited | Professional & scientific | 2016 |
| HH Dairy Consultancy Ltd | Agriculture & fishing | 2013 |
| Hhfitness Limited | Arts & recreation | 2025 |
| Hi&Lo Music Ltd | Information & communication | 2021 |
| Hibberd Development Company Ltd | Construction | 2009 |
| Hibtrade International Limited | Administrative & support | 1988 |
| Hickman-Shearer Limited | Professional & scientific | 2015 |
| Hideaway Garage Limited | Wholesale & retail | 2002 |
| Hideaways Play Limited | Administrative & support | 2008 |
| Hiflex Lancashire Limited | Professional & scientific | 1953 |
| High & Wide Property Ltd | Construction | 2019 |
| High Aerospace Ltd | Professional & scientific | 2011 |
| High Class Solutions Limited | Transport & logistics | 2005 |
| High Mount (Freehold) Limited | Households | 1995 |
| High Mount (Management) Limited | Households | 1969 |
| High Performance Development Limited | Administrative & support | 2002 |
| High Point Residents Management Company Limited | Households | 2021 |
| High Post Golf Club Limited | Arts & recreation | 1963 |
| High Post Grain Silos Limited | Other services | 1978 |
| High Trees (Tetbury) Management Company Limited | Households | 2016 |
| High Voltage Design & Build Ltd. | Manufacturing | 2001 |
| Highfield Garage Limited | Wholesale & retail | 2002 |
| Highfield Management Company (Wiltshire) Limited | Real estate | 2002 |
| Highfield Place (Dartford) Management Limited | Households | 2006 |
| Highfields Management (Littleport) Limited | Households | 2005 |
| Highfields P2 (Coedely) Management Company Limited | Households | 2017 |
| Highland Plumbing & Heating Ltd | Construction | 2017 |
| Highmount & Eastmount Residents Co. Ltd. | Households | 1991 |
| Highpost Lighting Services Ltd | Construction | 2023 |
| Hikari Clean Living Limited | Administrative & support | 2023 |
| Hildon Construction Limited | Construction | 2004 |
| Hill Data Systems Limited | Information & communication | 2010 |
| Hill Farm (Dullingham) Management Company Limited | Households | 2017 |
| Hill Flooring Group Ltd | Financial services | 2026 |
| Hill Harbour Films Limited | Arts & recreation | 2020 |
| Hill Top Equestrian Ltd | Agriculture & fishing | 2018 |
| Hillfort Machine (Engineering) Limited | Manufacturing | 2022 |
| Hilliers Vermin Control Limited | Agriculture & fishing | 2003 |
| Hillman Care UK Ltd | Health & social care | 2024 |
| Hillman Studios Ltd. | Professional & scientific | 2011 |
| Hillscom Ltd | Administrative & support | 2007 |
| Hilltop Pubs Limited | Hospitality | 2019 |
| Hilltop Restaurant (Firsdown) Limited | Extraterritorial | 2007 |
| Himalayan Property Ltd | Real estate | 2024 |
| Himalayan Property Partner Ltd | Real estate | 2025 |
| Hindon Green Limited | Administrative & support | 2013 |
| Hindon Road Management Limited | Households | 2007 |
| Hint of Lime Limited | Arts & recreation | 2005 |
| Hinterland Theatre CIC | Information & communication | 2024 |
| Hinton Gardens (Woodford Halse) Management Company Limited | Real estate | 2019 |
| Hinton Roofing Ltd | Construction | 2022 |
| Hirst Executive Coaching Limited | Professional & scientific | 2004 |
| Hirtenberger Defence Holding Ltd | Financial services | 2016 |
| Hirtenberger Defence International Ltd | Public administration | 2016 |
| Historic Building Advisory Service Limited | Administrative & support | 2003 |
| Hive Communications Ltd | Information & communication | 2004 |
| Hivox Audio Ltd | Information & communication | 2025 |
| HJ Contracting Ltd | Construction | 2024 |
| HJA Investments Ltd | Real estate | 2019 |
| HJV Ltd | Professional & scientific | 2021 |