| Harbinger Research Technologies Ltd | Information & communication | 2024 |
| Harbour 25 Ltd | Hospitality | 2025 |
| Harbour View SA1 Limited | Households | 2011 |
| Harcourt Innovations Ltd | Professional & scientific | 2025 |
| Harcourt Manor Limited | Households | 1998 |
| Harcourt View Management Company Limited | Households | 2026 |
| Hardwood and Natural Stone Flooring Company Limited | Wholesale & retail | 2005 |
| Hare Krishna Investments Limited | Real estate | 2022 |
| Haresdown Property Limited | Construction | 2007 |
| Harfield Court (Bognor Regis) Leaseholders Association Limited | Real estate | 2000 |
| Harlequin Bathrooms of Salisbury Limited | Wholesale & retail | 2015 |
| Harley Curtain Wall Limited | Construction | 1996 |
| Harley Street Executive Ltd | Health & social care | 2016 |
| Harlin Limited | Professional & scientific | 2000 |
| Harnham Fish Bar and Curry Land Limited | Hospitality | 2018 |
| Harnham Physiotherapy Clinic Ltd | Health & social care | 2017 |
| Harnleigh Green Management Company Limited | Households | 1983 |
| Harnova Solutions Limited | Information & communication | 2026 |
| Harnwood Estates Limited | Real estate | 2013 |
| Harpenden Fitted Interiors Limited | Wholesale & retail | 2015 |
| Harpers for Growth Limited | Wholesale & retail | 2012 |
| Harris Carpentry Limited | Administrative & support | 2006 |
| Harris Multiservices Ltd | Administrative & support | 2023 |
| Harrison Hire Limited | Administrative & support | 2005 |
| Harrison Quality Homes Ltd | Real estate | 2018 |
| Harry & Tracey Ltd | Arts & recreation | 2025 |
| Harry Brown Specialists Ltd | Construction | 2024 |
| Harry Charles Enterprises Ltd | Other services | 2021 |
| Harry Waterton Photography Limited | Professional & scientific | 2023 |
| Harry's Field Management Ltd | Professional & scientific | 2020 |
| Hart Tax Consulting Limited | Professional & scientific | 2020 |
| Hartley House Management Limited | Households | 1981 |
| Hartsprays Ltd. | Wholesale & retail | 1999 |
| Hartwell in the Forest Ltd | Financial services | 2019 |
| Harvest Gate (Totton) Management Company Limited | Households | 2015 |
| Harvest Rise Management Company Limited | Households | 2007 |
| Harvey Farms (Winterbourne) Limited | Agriculture & fishing | 2001 |
| Harvey's Garden Services Limited | Households | 2023 |
| Harwood Carpentry Ltd | Manufacturing | 2021 |
| Haskin, Shepherd & Co. LLP | | 2009 |
| Haslink Limited | Real estate | 2013 |
| Hastings Court (Sarum) Limited | Households | 1984 |
| Haswell Building Services Limited | Professional & scientific | 2002 |
| HAT and Beaver Management Company Limited | Real estate | 2012 |
| Hatherton Investments Limited | Construction | 1959 |
| Haupt & Haupt Financial Services Ltd | Financial services | 2025 |
| Havail Limited | Information & communication | 2021 |
| Havelock Court Management Company Limited | Households | 1993 |
| Haven Mead Limited | Construction | 2023 |
| Haven Property Group Ltd | Real estate | 2019 |
| Havenwells Limited | Real estate | 1999 |
| Haverland UK Limited | Wholesale & retail | 2010 |
| Hawkesdown House Limited | Education | 2011 |
| Hawkhurst Consultancy Limited | Professional & scientific | 2016 |
| Hawkhurst Properties Limited | Real estate | 2020 |
| Hawksley Rise (Redhill) Management Company Limited | Households | 2026 |
| Haworth Place Management Company Limited | Households | 2024 |
| Hawthorn Court Residents Association (1992) Limited | Hospitality | 1994 |
| Hawty Homes Ltd | Construction | 2021 |
| Haxton Partners Ltd | Administrative & support | 2026 |
| HAY Common Management Company Limited | Households | 2017 |
| Hayball Motorcycles Limited | Wholesale & retail | 1999 |
| Haybridge (Wells) Management Company Limited | Households | 2019 |
| Hayes Mckenzie Partnership Limited | Professional & scientific | 2004 |
| Hayes Mckenzie Trustee Limited | Professional & scientific | 2024 |
| Hayfield Lawns (Welford) Management Company Limited | Households | 2014 |
| Hayman Gardens Limited | Administrative & support | 2014 |
| Hayter Removals & Clearance Ltd | Transport & logistics | 2026 |
| Hayward Property (UK) Ltd | Real estate | 2016 |
| Hazel Fold Residents Management Company Limited | Households | 2021 |
| Hazel Hollow Developments Limited | Real estate | 2018 |
| Hazel Morgan Fine Art Limited | Arts & recreation | 2007 |
| Hazelmere House (Salisbury) Limited | Households | 2001 |
| Hazelwood ARC Limited | Education | 2023 |
| Hbhg Ltd | Hospitality | 2022 |
| HC Classics Limited | Wholesale & retail | 2021 |
| HC Realisations 2024 Ltd | Construction | 1989 |
| HCL Contractors Limited | Construction | 2020 |
| HCL Hamble Ltd | Hospitality | 2023 |
| HD Allfrey Limited | Other services | 2020 |
| Hd-Tours Limited | Administrative & support | 2025 |
| Headcorn Parachute Club Limited | Transport & logistics | 1979 |
| Headingley Platform 1 Management Company Limited | Households | 2007 |
| Headington Publishing Services Ltd | Information & communication | 2020 |
| Headscape Holdings Limited | Information & communication | 2017 |
| Headscape Limited | Information & communication | 2001 |
| Heal Hands Ltd | Health & social care | 2022 |
| Heale Trustees Limited | Professional & scientific | 2019 |
| Healhive Ltd | Health & social care | 2024 |
| Health Bite Limited | Health & social care | 2016 |
| Healthcare Efficiencies Limited | Administrative & support | 2012 |
| Healthy Developments (Sandleheath) LLP | | 2020 |
| Healthy Hands Healthcare Limited | Health & social care | 2020 |
| Healthy Property Group Limited | Construction | 2012 |
| Heart of the Home (Wiltshire) Ltd | Construction | 2018 |
| Heat Rhight Limited | Financial services | 2017 |
| Heatek Mechanical Ltd | Construction | 2026 |
| Heathfield Court (Sholing) Management Co. Ltd | Households | 2008 |
| Heating and Plumbing Assist Limited | Other services | 2018 |
| Heaven Hair Limited | Other services | 2003 |