| Hcis Limited | Southampton | 1996 |
| HCL (Churchgate) Limited | Hoddesdon | 2016 |
| HCL (Hertford Road) Limited | Hoddesdon | 2016 |
| HCM Investments Ltd | Bexhill | 2023 |
| HCM Management Ltd | Edinburgh | 2011 |
| HCN Ltd | Livingston | 2013 |
| HCO Investments Limited | Worthing | 2024 |
| HCO Nominee Limited | Twickenham | 2025 |
| HCP Pumps UK Ltd. | Wigton | 2011 |
| HCS Associated Services Limited | Market Rasen | 2015 |
| HCS Home Care Solutions Ltd | Manchester | 2023 |
| Hcsp (Yorkshire) Ltd | Bradford | 2012 |
| HCT Management Ltd | Coventry | 2014 |
| HCV (Shropshire) Ltd | Bridgnorth | 2018 |
| HCW Financial Planning Limited | London | 1986 |
| HCW Secretaries Limited | London | 1996 |
| HD Custom Norway Limited | London | 2024 |
| HD Customs Invest Limited | London | 2024 |
| HD Gurney Consulting Ltd | Bristol | 2013 |
| HD Investments (UK) Limited | | 2003 |
| HD Landscapes and Grab Hire Ltd | Nuneaton | 2025 |
| HD Plant Hire (UK) Ltd | Newport | 2012 |
| HD Shelf One Limited | London | 2026 |
| HD Wraps UK Ltd | Nottingham | 2018 |
| HDA (UK) Ltd. | Poole | 2001 |
| HDA Futures Ltd | Edinburgh | 2023 |
| HDA Trustees Limited | Wallingford | 2020 |
| HDB Design & Build Limited | Waterlooville | 2020 |
| HDB Holdings Limited | Waterlooville | 2020 |
| HDC (Scotland & NI) Limited | Renfrew | 2015 |
| HDC Cleaners Limited | Harrogate | 2014 |
| Hdch Limited | Shrewsbury | 2025 |
| Hdco EPL2 Limited | Liverpool | 2016 |
| Hdew Cameras Limited | Ashtead | 2010 |
| HDH Limited | Glasgow | 1994 |
| HDL Enterprises Ltd. | Chatham | 2011 |
| Hdlr Ltd | London | 2011 |
| Hdma Limited | Woodford Green | 2020 |
| Hdoors Limited | Wigan | 2018 |
| HE Baha Ltd | Ulverston | 2022 |
| HE Limited | Newmarket | 2005 |
| HE Reigns Electrical & Building Services Limited | Romford | 2020 |
| He's Lord Ltd | Peterborough | 2024 |
| HE2 N1 Bristol 1 Limited | London | 2018 |
| HE2 N1 Goole 1 Limited | London | 2021 |
| HE2 N1 High Wycombe 2 Limited | London | 2021 |
| HE2 N1 Huntingdon 1 Limited | London | 2021 |
| HE2 N1 Ipswich 1 Limited | London | 2022 |
| HE2 N1 Northampton 1 Limited | London | 2022 |
| HE2 N1 Reading 1 Limited | London | 2021 |
| HE2 N1 Tottenham 1 Limited | London | 2023 |
| HE2 N2 Bristol 1 Limited | London | 2018 |
| HE2 N2 Goole 1 Limited | London | 2021 |
| HE2 N2 High Wycombe 2 Limited | London | 2021 |
| HE2 N2 Huntingdon 1 Limited | London | 2021 |
| HE2 N2 Ipswich 1 Limited | London | 2022 |
| HE2 N2 Northampton 1 Limited | London | 2022 |
| HE2 N2 Reading 1 Limited | London | 2021 |
| HE2 N2 Tottenham 1 Limited | London | 2023 |
| HE4 N1 Billingshurst 1 Limited | London | 2023 |
| HE4 N1 Crewe 1 Limited | London | 2023 |
| HE4 N1 Park Royal 1 Limited | London | 2024 |
| HE4 N1 Raunds 1 Limited | London | 2024 |
| HE4 N1 Swanley 1 Limited | London | 2024 |
| HE4 N1 Wigan 1 Limited | London | 2025 |
| HE4 N2 Billingshurst 1 Limited | London | 2023 |
| HE4 N2 Crewe 1 Limited | London | 2023 |
| HE4 N2 Park Royal 1 Limited | London | 2024 |
| HE4 N2 Raunds 1 Limited | London | 2024 |
| HE4 N2 Swanley 1 Limited | London | 2024 |
| HE4 N2 Wigan 1 Limited | London | 2025 |
| HE5 N1 Canning Town 1 Limited | London | 2024 |
| HE5 N1 Crewe 2 Limited | London | 2025 |
| HE5 N1 Guildford 1 Limited | London | 2025 |
| HE5 N1 Leatherhead 1 Limited | London | 2026 |
| HE5 N1 Luton 1 Limited | London | 2025 |
| HE5 N1 Tottenham 2 Limited | London | 2025 |
| HE5 N2 Canning Town 1 Limited | London | 2024 |
| HE5 N2 Crewe 2 Limited | London | 2025 |
| HE5 N2 Guildford 1 Limited | London | 2025 |
| HE5 N2 Leatherhead 1 Limited | London | 2026 |
| HE5 N2 Luton 1 Limited | London | 2025 |
| HE5 N2 Tottenham 2 Limited | London | 2025 |
| Head & Wheble Funeral Directors Ltd | Bournemouth | 2016 |
| Head Food Ltd | Totnes | 2019 |
| Head Into the Wild Ltd | Nantwich | 2022 |
| Head Ready Learning Ltd | Birmingham | 2019 |
| Head Straight Limited | Reading | 2018 |
| Headabovewater Limited | Manchester | 2025 |
| Headaway (Europe) Limited | Aberdare | 2000 |
| Headcount Ltd | Doncaster | 2022 |
| Heading OUT Investment PLC | London | 2008 |
| Headland Management Limited | Bangor | 2007 |
| Headland Nominee Limited | London | 2024 |
| Headley Road Management Limited | Hindhead | 1998 |
| Headlight Lens Cover Ltd | Cambridge | 2023 |
| Headliner Events Ltd | Cheadle | 2026 |
| Headliner Group Ltd | Cheadle | 2026 |
| Headliner Property Ltd | Cheadle | 2026 |
| Headman Estates Limited | Macclesfield | 1996 |