| Hadrian Norge Limited | London | 2013 |
| Hadrian Vets Limited | York | 2011 |
| Hadsec Limited | Smethwick | 1997 |
| Hadston Education Limited | Cardiff | 2013 |
| Hadston Parade Ltd | Gateshead | 2015 |
| Hadston Precinct Ltd | Gateshead | 2015 |
| Hady Hill Estates Limited | Chesterfield | 1999 |
| Haem Path Limited | Northolt | 2024 |
| Haemoclaim Limited | Stockport | 2011 |
| Haemoclaim Training Limited | Stockport | 2011 |
| Haffenden Skip Hire Limited | Maidstone | 2020 |
| Hafstad Investment Limited | London | 2025 |
| Hafstad Sea Power System Limited | London | 2025 |
| HAG Associates Ltd | Coventry | 2018 |
| HAG Beauty Limited | St. Neots | 2023 |
| HAG UK 02 Limited | London | 2024 |
| HAG UK 05 Limited | London | 2025 |
| HAG UK 06 Limited | London | 2025 |
| HAG UK 07 Limited | London | 2025 |
| HAG UK 08 Limited | London | 2025 |
| HAG UK 09 Limited | London | 2025 |
| HAG UK 10 Limited | London | 2025 |
| HAG UK Ltd. | Bristol | 2012 |
| Hagearbeid OG Snekkerarbeid Invest Limited | London | 2022 |
| Hagearbeid OG Snekkerarbeid Limited | London | 2022 |
| Hagen Douglas Biggin Ltd | Stoke-On-Trent | 2022 |
| Hagley Cricket Club Ground Limited | Stourbridge | 2016 |
| Haglley Corporation Limited | London | 2005 |
| Hagshift Limited | Sutton | 2016 |
| Hagstedt Holding Limited | London | 2023 |
| Hague Enterprise Limited | London | 2024 |
| Hague Park 1960 Limited | Pontefract | 2014 |
| Hagues Garage Services Ltd | Sheffield | 2006 |
| Hah(Hk) Company Limited | London | 2013 |
| Hahntech International Limited | London | 1988 |
| HAI Point Ltd | London | 2012 |
| Haibian Power Equipment Co., Ltd. | Beckenham | 2021 |
| Haida Machinery Co., Ltd | Ruislip | 2021 |
| Haidre Ltd | Doncaster | 2021 |
| Haiduo International Trade Co., Ltd | Beckenham | 2014 |
| Haifa Industrial Group Co., Ltd | London | 2019 |
| Haifu Food Co., Ltd | Beckenham | 2024 |
| Haigh Coombes Limited | Rhyl | 2021 |
| Haigh Developments - Bewsey Street Ltd | Warrington | 2019 |
| Haigh Developments - Mere Lane Ltd | Warrington | 2024 |
| Haigh Moor Road Property Company Limited | Hornsea | 2007 |
| Haihang Trading Ltd | Beckenham | 2022 |
| Haikou (KO Fung) Refinery (UK) Limited | London | 2009 |
| Haikou (KO Fung) Refinery Limited | Manchester | 2012 |
| Hail the Villains Ltd | Bishopton | 2016 |
| Hailesland Park 1954 Limited | Edinburgh | 2014 |
| Hailey House Ltd | London | 2022 |
| Hailey Houseware Trading Co., Ltd | London | 2016 |
| Hailey Ltd | Harrogate | 2013 |
| Hailsham 1963 Limited | Eastbourne | 2015 |
| Hailsham News Limited | Hastings | 2022 |
| Hainault Residential Limited | London | 2020 |
| Hainbuch Limited | Cannock | 1998 |
| Haines Watts Birmingham Limited | Wolverhampton | 2024 |
| Haines Watts Tamworth Limited | Wolverhampton | 2026 |
| Haining Changyou Import and Export Co., Ltd | Stafford, | 2016 |
| Haining Road Limited | Ascot | 2004 |
| Haining Veldi Automation Equipment Co Ltd | Beckenham | 2019 |
| Haiou (Hong Kong) Marine Engineering Co., Limited | London | 2013 |
| Hair at Home Newcastle Ltd | Newcastle Upon Tyne | 2016 |
| Hair Boost Ltd | Harrogate | 2012 |
| Hair Box Ltd | London | 2024 |
| Hair by My Stylist Ltd | London | 2025 |
| Hair by Sash Limited | Durham | 2005 |
| Hair Future Group Ltd | Gillingham | 2017 |
| Hair Parade Ltd | Rossendale | 2012 |
| Hair Products Direct Ltd | Derby | 2011 |
| Hair Rehab Limited | Paignton | 2015 |
| Hair Restore Limited | Harrogate | 2011 |
| Hair Station Lancaster Limited | Lancaster | 2023 |
| Hair Supermarket Limited | Rochester | 2008 |
| Hair X Ltd | Halesowen | 2024 |
| Hairbond Ltd | Lytham St. Annes | 2026 |
| Haircut Limited | Harrogate | 2011 |
| Hairspace Limited | Kensington | 2005 |
| Hairtamin Limited | Maidstone | 2022 |
| Haitec Group Co., Ltd | Beckenham | 2019 |
| Haitima Flow Control UK Limited | Wilmslow | 2012 |
| Haiwei International Trading Limited | London | 2018 |
| Haixing International Trade Co., Ltd. | Beckenham | 2014 |
| Haiyan Dame Sanitary Wares Co., Ltd | Bromley | 2012 |
| Haiyan Shiner Hardware Co., Ltd. | Beckenham | 2013 |
| Haiyan Ximei Printing Co., Ltd | Stafford, | 2012 |
| Haiyao Trading Co., Ltd | London | 2025 |
| Haizhiqiao Houseware Co., Limited | London | 2022 |
| Haizhu International Ltd | Kington | 2014 |
| Hajdari Coffee Ltd | London | 2026 |
| Haji Transport Ltd | Birmingham | 2024 |
| Hake Electrical Technology Co., Ltd | Beckenham | 2022 |
| Hakerley Bridge Farm Ltd | Colchester | 2024 |
| Haki GN Limited | Leeds | 2022 |
| Hakim Group 1 Limited | Darwen | 2026 |
| Hakim Group 10 Limited | Darwen | 2026 |
| Hakim Group 11 Limited | Darwen | 2026 |
| Hakim Group 12 Limited | Darwen | 2026 |