| Harvey and Richardson (Holdings) Limited | Bolton | 2003 |
| Harvey Baxter Limited | Harrogate | 2025 |
| Harvey Hodson Limited | Buxton | 2015 |
| Harvey Lawrence Consulting Limited | Polesworth | 2025 |
| Harvey Micks Limited | Burnley | 2006 |
| Harvey Moon Vintage Style Limited | Higham Ferrers | 2015 |
| Harvey Nichols International Ltd | Cardiff | 2026 |
| Harvey Reed Top Table Limited | Kettering | 1975 |
| Harvey Roberts Limited | Stockport | 2015 |
| Harvey Stan Technology Co., Limited | Beckenham | 2013 |
| Harvey's (North Country) Properties Limited | Yorkshire | 1951 |
| Harvey's Office Coffee Ltd | Bromsgrove | 2015 |
| Harvey's Painting & Decorating Ltd | Eastleigh | 2018 |
| Harvey-Samuel Property Ltd | Swindon | 2022 |
| Harveygarden Consultants Limited | Bath | 2013 |
| Harveys (Leisure) Limited | Sheffield | 2012 |
| Harveys Electrical Limited | High Wycombe | 2017 |
| Harveys Healthcare Newarthill Ltd | Glasgow | 2012 |
| Harwell Construction Ltd | Bridgwater | 2016 |
| Harwich Taxis Limited | Harwich | 2026 |
| Harwin Technology Company Limited | Portsmouth | 2020 |
| Harwood Automotive Ltd | Chipping Norton | 2021 |
| Harwood Financial Ltd | St. Neots | 2006 |
| Harwood International Limited | Chorley | 1993 |
| Harwood Ventures Ltd | Andover | 2015 |
| Harworth Management Shelfco Limited | Rotherham | 2025 |
| Harworth PPA Holdco Limited | Rotherham | 2024 |
| Harworth PPA NO 1 Limited | Rotherham | 2024 |
| HAS Foods Ltd | Aberdeen | 2018 |
| Hasan Numan Ltd | Barnet | 2023 |
| Hasankhan Mohamedkhan Pathan Ltd | Preston | 2023 |
| Hasbex Ltd | Bexhill-On-Sea | 2025 |
| Haseeb Motors London Ltd | Feltham | 2020 |
| Hash Engineering Consultants Ltd | Romford | 2012 |
| Hash Key Ltd | Harrogate | 2012 |
| Hashi AM Ltd | Leicester | 2022 |
| Hashir Ltd | Manchester | 2013 |
| Hashtag City Limited | Henley-On-Thames | 1998 |
| HASHTAG5 Limited | Bournemouth | 2019 |
| Hasketon Foods Limited | Woodbridge | 1999 |
| Haslar Yacht Services Ltd | Romford | 2016 |
| Haslechurch Limited | Ipswich | 2016 |
| Haslemere Business Centre C.I.C. | Haslemere | 2015 |
| Haslemere Motor Cycles Limited | Eastcote | 2004 |
| Hasler Engineering Developments Limited | Hereford | 2010 |
| Haslington Tech Repair Ltd | Crewe | 2024 |
| Hasmo Eiendom & Taxi Limited | London | 2024 |
| Hasmyidentitybeenstolen.Com Limited | Shepperton | 2015 |
| Hasrat Ltd | London | 2024 |
| Hass Investment Norway Limited | London | 2021 |
| Hass Renhold Limited | London | 2021 |
| Hassall Homes (Cheshire) Limited | High Wycombe | 1972 |
| Hassall Homes (Mercia) Limited | High Wycombe | 1985 |
| Hassall Homes (Southern) Limited | High Wycombe | 1950 |
| Hassall Homes (Wessex) Limited | High Wycombe | 1957 |
| Hassalo Limited | Elstree | 2018 |
| Hassan Khan Ltd | Preston | 2023 |
| Hassan Mahmood Ltd | Bradford | 2019 |
| Hassani Holding Limited | London | 2024 |
| Hassco Limited | Bradford | 2010 |
| Hasselstroem Consulting Limited | London | 2010 |
| Hassium Asset Management Limited | London | 2006 |
| HASSLE3 Ltd | Southend-On-Sea | 2021 |
| Hasslegarden Limited | London | 2025 |
| Hassobury Assets Limited | Bishop'S Stortford | 1997 |
| Hassocks Golf Club Limited | Hassocks | 1997 |
| Hassoni Assistans Limited | London | 2024 |
| Hastings & District Transport Limited | Newport | 2019 |
| Hastings Associates Limited | Cardiff | 2026 |
| Hastings Facilities Services Limited | Hastings | 2024 |
| Hastings of England Limited | Huddersfield | 1983 |
| Haswell Healthcare Limited | Poole | 2018 |
| Hatch Financial Services Ltd | London | 2021 |
| Hatch House IP Limited | Newbury | 2020 |
| Hatchcroft Limited | Salford | 1996 |
| Hatched.Co.Uk Ltd | Leighton Buzzard | 2007 |
| Hatchedepc.Co.Uk Limited | Leighton Buzzard | 2011 |
| Hatcher Aerodynamics Ltd | Framlingham | 2023 |
| Hatcher Composites Ltd | Framlingham | 2024 |
| Hatcher Conversions Limited | Framlingham | 2009 |
| Hatcher Mouldings Ltd | Framlingham | 2024 |
| Hatchers Limited | Shrewsbury | 2007 |
| Hatchers Trustees Limited | Shrewsbury | 2011 |
| Hatchet Investment Properties Limited | London | 2012 |
| Hatchgate Close Management Co. Limited | East Grinstead | 1999 |
| Hate Crime Alliance UK Limited | Bradford | 2013 |
| Hatem and Raafat Ltd | Harrogate | 2022 |
| Hatex (UK) Limited | Bessborough Road | 1993 |
| Hatfield Construction Limited | Berkshire | 1979 |
| Hatfield Crescent 1960 Limited | Stoke-On-Trent | 2014 |
| Hatfield House Property Limited | Walsall | 2017 |
| Hatfield Mini and Midi Skip Hire Limited | Graveley | 2012 |
| Hatfield Skip & Grab Hire Limited | London | 2008 |
| Hatfields Limited | Colchester | 2000 |
| Hathaways of Berkshire Ltd | Reading | 2012 |
| Hatherdown (1991) Limited | Nottingham | 1977 |
| Hatherley 1960 Limited | Chalfont St. Giles | 2013 |
| Hatherton Hall Farm Limited | Stafford | 1973 |
| Hathi Health Ltd | Birmingham | 2018 |
| Hathor Chemical Corporation Ltd | Beckenham | 2019 |