| Harkstore Limited | Construction | 1998 |
| Harlow Gateway Limited | Households | 2006 |
| Harmony Health Cover Ltd | Financial services | 2016 |
| Harmony Mortgages Ltd | Financial services | 2026 |
| Harpers Heath (Hatfield) Managing Company Limited | Professional & scientific | 2018 |
| Harpur House (New Milton) Management Company Limited | Households | 2025 |
| Harris Close Management Company Ltd | Households | 2002 |
| Harrison Display Systems Limited | Manufacturing | 1978 |
| Harrison Estate Agents Limited | Real estate | 2002 |
| Hartington Gate Residents Company Limited | Households | 1988 |
| Harvestgrove Developments Limited | Households | 1984 |
| Haskins House Management Company Limited | Households | 2020 |
| Haslam Road Flats Management Company Limited | Households | 1982 |
| Hastings Park (Phase 2) Ashby Management Company Limited | Households | 2016 |
| Hathaway Gardens Management Limited | Households | 2016 |
| Hathern Road (Shepshed) Management Company Limited | Households | 2017 |
| Hatton Grange (Longstanton) Management Company Limited | Households | 2012 |
| Haven Court Milford-On-Sea Limited | Households | 2007 |
| Hawkchurch Management Company Limited | Households | 2015 |
| Hawkhill Ltd | Wholesale & retail | 2019 |
| Hawksview (Hawkhurst) Management Company Limited | Real estate | 2018 |
| Hawthorn Mews (Bedhampton) Residents Management Company Limited | Households | 2015 |
| Hawthorn Rise (Newton Abbot) Management Company Limited | Administrative & support | 2016 |
| Hayes Green Management Company Limited | Households | 2010 |
| Hayes Mews (Stony Stratford) Management Company Limited | Households | 2010 |
| Hayters Court Management Company Limited | Households | 2021 |
| Hayward FOX Limited | Real estate | 2013 |
| Hayward Marine Services Ltd | Manufacturing | 2022 |
| Hazelbourne Mews (Clapham) Management Company Limited | Households | 1996 |
| Hazlemere Marina (Waltham Abbey) Management Company Limited | Professional & scientific | 2016 |
| HCH Carpentry & Building Limited | Construction | 2024 |
| Headington Heights Management Company Limited | Households | 2000 |
| Headland Court Management Co. Limited | Households | 1989 |
| Heat Solutions UK (Southern) Limited | Construction | 2015 |
| Heath Farm Lane Residents Management Company Limited | Households | 2021 |
| Heathcote Park (Warwick) Management Limited | Households | 2016 |
| Heatherstone Grange (Bransgore) Management Company Limited | Households | 2016 |
| Heathlands Residents Management Company Limited | Households | 2016 |
| Hector Court (Putney) Management Limited | Households | 1969 |
| Heddon Way Management (1996) Limited | Households | 1996 |
| Hedge END III Management Company Limited | Households | 1990 |
| Helliers Lane (Cheddar) Management Company Limited | Other services | 2021 |
| Helme Ridge (Meltham) Management Company Limited | Other services | 2016 |
| Helpline Ltd | Health & social care | 2005 |
| Hennessey Health Care Limited | Health & social care | 2017 |
| Hepburn Chase Management Company Limited | Households | 2011 |
| Heppenstalls Solicitors Limited | Professional & scientific | 2011 |
| Herbactive Limited | Wholesale & retail | 2013 |
| Heritage Court Property Management Company Limited | Households | 2005 |
| Heritage Gate (Bloxwich) Management Company Limited | Households | 2008 |
| Heritage Hospitality Inn Ltd | Hospitality | 2025 |
| Heron House (Wichelstowe) Management Company Limited | Households | 2020 |
| Heron Place Property Ltd | Real estate | 2017 |
| Hexagon Accounting Services Ltd | Professional & scientific | 2025 |
| HFL Advisers Limited | Professional & scientific | 2018 |
| HH Signalling Ltd | Construction | 2023 |
| Hidcote House Management Company Limited | Households | 2023 |
| High Cedars (Shottery) Management Company Limited | Households | 2015 |
| High Corner Limited | Households | 1975 |
| Highcliffe Home Solutions Limited | Construction | 2016 |
| Higher Trewhiddle Management Company Limited | Households | 2021 |
| Highfields (Apartments) Management Company Limited | Households | 2007 |
| Highfields (Basingstoke) Management Company Limited | Households | 2015 |
| Highfields (Broadway) Management Company Limited | Households | 2006 |
| Highfields (Caldecote) Management Company Limited | Households | 2017 |
| Highfields (Pontprennau) Management Company Limited | Households | 2017 |
| Highgate (Walsall) Management Company Limited | Extraterritorial | 2000 |
| Highland Park (South Ockendon) Management Company Limited | Households | 2018 |
| Highlands (Phase 1) Apartment Management Company Limited | Households | 1995 |
| Highwood Gardens (Tiverton) Management Company Limited | Households | 2021 |
| Hill HAY Close Amenity Management Company Limited | Households | 2014 |
| Hill View Drive (Bexley) Management Company Limited | Real estate | 2015 |
| Hillstead Court RTM Company Limited | Households | 2009 |
| Hilltop Crescent Management Company Limited | Households | 2016 |
| Hilltop Park (Chippenham) Management Company Limited | Households | 2019 |
| Hilton House (21-22 Craven Hill Gardens) Freehold Limited | Households | 2017 |
| Hilton House (Investors ) Limited | Real estate | 2017 |
| Hilton House Residents Limited | Households | 1985 |
| Hinckley Park Management Company Limited | Households | 2012 |
| Hinton House Management Company Limited | Households | 1994 |
| Hiuxid Limited | Professional & scientific | 2024 |
| HMR Estates Limited | Construction | 2024 |
| HOI SAM Limited | Hospitality | 2023 |
| Hollson Homes Limited | Construction | 2025 |
| Holly Gate (Kings Heath) Management Company Limited | Households | 2007 |
| Holly Jackson Consulting Ltd | Professional & scientific | 2022 |
| Hollyblue Chase Management Company Limited | Households | 2003 |
| Holm Oaks Management Company Limited | Households | 2007 |
| Holmwood Gardens Management Limited | Real estate | 1983 |
| Holwell Lane (Pirton) Management Company Limited | Households | 2017 |
| Holy Healthcare Limited | Health & social care | 2016 |
| Home Farm (Ashley Clinton) Management Co Limited | Real estate | 1994 |
| Home Style Exteriors (South) Limited | Construction | 2025 |
| Home Style Fascias and Cladding Ltd | Construction | 2014 |
| Honeymead Meadow Management Company Limited | Households | 2016 |
| Hoplo.Net Limited | Information & communication | 2019 |
| Horlock Enterprises Ltd | Wholesale & retail | 2022 |
| Hornbeams (Welwyn Garden City) Management Company Limited | Households | 2012 |
| Horsbere Mews (Longford) Management Company Limited | Households | 2016 |
| Horsemans Mews (Glastonbury) Management Company Limited | Households | 2005 |