| Groundshore Plant and Equipment Limited | Manufacturing | 2020 |
| Halo Site Services Limited | Construction | 2019 |
| Harrow Life Financial Limited | Financial services | 2001 |
| Harrow Life Financial Solutions Limited | Financial services | 2001 |
| Harrow Roofing and Building Limited | Construction | 2015 |
| Hartsbourne Ceramic Laboratory Limited | Health & social care | 2003 |
| Haslemere Motor Cycles Limited | Extraterritorial | 2004 |
| Hausmann Limited | Professional & scientific | 2015 |
| Hennessy Family Partnership LLP | | 2022 |
| Herons Rest Land and Developments Ltd | Construction | 2023 |
| Hertsrock Limited | Construction | 2009 |
| Hickes Computing Ltd | Information & communication | 2020 |
| Holland Park Maintenance Ltd | Construction | 2012 |
| Huscolope (Denham) Limited | | 1960 |
| IDT Property UK Ltd | Real estate | 2013 |
| IGH Homes Limited | Real estate | 2024 |
| Insite Services Limited | Administrative & support | 2023 |
| Instalcom UK Limited | Extraterritorial | 2002 |
| Integrity Wealth Management Ltd | Financial services | 2011 |
| Ipaciti Limited | Professional & scientific | 2000 |
| J.D.K. Rigging Limited | Information & communication | 2015 |
| Jennings Plumbing and Heating Ltd | Construction | 2020 |
| Jennings Plumbing Supplies Ltd | Wholesale & retail | 2025 |
| JOC Quantity Surveying Ltd | Professional & scientific | 2024 |
| JT Shaftsbury Limited | Real estate | 2020 |
| Jtcc Limited | Professional & scientific | 2011 |
| Jubilee Yard Ltd | Professional & scientific | 1999 |
| K.J. Childs & Sons Limited | Construction | 1946 |
| Keltic Traffic Management Limited | Transport & logistics | 2016 |
| Key Facet Ltd | Manufacturing | 2013 |
| Kyrgyz British Foundation | Education | 2025 |
| Ladies Paradise Limited | Other services | 2012 |
| LAR Consultancy Ltd | Professional & scientific | 2014 |
| Leonforte Properties Limited | Real estate | 2007 |
| London Accounting Works Limited | Professional & scientific | 2007 |
| Lotuswise Financial Management Limited | Professional & scientific | 2007 |
| Luton Metal Recycling Limited | Water & waste | 2023 |
| Lynch GAS Services Ltd | Energy | 2015 |
| M.A.D. Property Developments Limited | Construction | 2019 |
| Magner Construction Limited | Construction | 2017 |
| Malone Dispense Limited | Manufacturing | 2011 |
| Manakamana Catering Ltd | Hospitality | 2016 |
| Manichem (Harehills) Limited | Wholesale & retail | 2019 |
| Manor Developments (Ruislip) Limited | Construction | 2015 |
| Mcandrew Family Holdings Ltd | Real estate | 2022 |
| Middlesex Alarms Limited | Administrative & support | 2016 |
| Middlesex Leisure Limited | Real estate | 2002 |
| Mindful Exchange CIC | Other services | 2025 |
| Mlrd Limited | Financial services | 2020 |
| Moor Vale Construction Limited | Construction | 2016 |
| Moriarty Brothers Property Limited | Real estate | 2025 |
| Moriarty Commercial Limited | Real estate | 2020 |
| Morrison Trading Limited | Wholesale & retail | 2022 |
| Mortgage Mike Limited | Financial services | 2013 |
| N Carroll Consulting Limited | Administrative & support | 2016 |
| Nightingales Nursing Recruitment Agency Limited | Administrative & support | 2001 |
| Nimyx Lakes Limited | Real estate | 2010 |
| Nimyx Properties Limited | Real estate | 2022 |
| Nimyx Residential Limited | Real estate | 2013 |
| Nmrt Limited | Administrative & support | 2011 |
| Nunasai Murugan Ltd | Hospitality | 2022 |
| O'Connor Group Limited | Extraterritorial | 2016 |
| O'Connor Group Topco Limited | Administrative & support | 2020 |
| O'Connor Properties Holdings Limited | Administrative & support | 2020 |
| O'Connor Properties Limited | Administrative & support | 2020 |
| Old Brompton Properties Limited | Administrative & support | 2007 |
| Olinton Investments Limited | Administrative & support | 1999 |
| Over and Above Ltd | Information & communication | 2014 |
| Paul O'Flynn Frcs Limited | Health & social care | 2012 |
| Peking Ltd | Hospitality | 2017 |
| Phone Parts Worldwide Ltd | Administrative & support | 2009 |
| PHS Plumbing and Heating Services Limited | Construction | 2003 |
| Pierhead Wharf Limited | Professional & scientific | 2009 |
| Pmof Limited | Administrative & support | 2015 |
| Pocket Phone Shop Limited | Wholesale & retail | 2018 |
| Portrack OCL Ltd | Administrative & support | 2016 |
| Principles Services Consultants Ltd | Professional & scientific | 2023 |
| Pro-Mar Distribution (UK) Limited | Wholesale & retail | 1983 |
| Projectscopes Limited | Administrative & support | 2019 |
| Purple Beard Ltd | Information & communication | 2018 |
| Purple Prana Ltd | Education | 2018 |
| Quinn & Co. of UK Ltd. | Professional & scientific | 2023 |
| Radical Computing Limited | Information & communication | 2003 |
| Reliance Demolition Limited | Construction | 1994 |
| RFS (London) Limited | Construction | 2003 |
| Rivergate Residential Limited | Real estate | 2026 |
| Rose Heat Limited | Construction | 2010 |
| Roundbush Estates Limited | Construction | 2025 |
| Roundbush Services Limited | Construction | 2022 |
| Rowena Lutu Limited | Extraterritorial | 2022 |
| Runnersworld Watford Limited | Wholesale & retail | 2013 |
| Rushiti Building Construction Limited | Construction | 2013 |
| Rycorp LLP | | 2020 |
| Ryzor Investments Ltd | Real estate | 2022 |
| Sachin Dhir Limited | Real estate | 2014 |
| Sacred Streams Communications Limited | Information & communication | 1999 |
| SAI Fast Food Ltd | Hospitality | 2025 |
| Scarlet Windows Limited | Construction | 2023 |
| Scenic 1 Limited | Construction | 2009 |
| Scooter Angel Limited | Transport & logistics | 2012 |