| Hampshire Staircase Refurbishments Ltd | Construction | 2016 |
| Happy Muzzle Co Ltd | Wholesale & retail | 2024 |
| Haretec Limited | Information & communication | 2021 |
| Hart Carpets Ltd | Wholesale & retail | 2022 |
| Hart White Lining Limited | Construction | 2016 |
| Harvey & Lloyd Limited | Real estate | 2017 |
| Hayley Nails and Beauty Ltd | Other services | 2024 |
| Heathwood Building Services Limited | Construction | 2005 |
| Heathwood Homes Limited | Extraterritorial | 2017 |
| High Street Properties Limited | Real estate | 1996 |
| Holdings KCR Limited | Financial services | 2025 |
| Home Counties Maintenance Limited | Construction | 2023 |
| Home Development Solutions Ltd | Construction | 2022 |
| House of Finch Aesthetics Ltd | Professional & scientific | 2021 |
| HTH Ltd | Wholesale & retail | 2024 |
| HTL Distribution Ltd | Transport & logistics | 2012 |
| Hurst Schools Limited | Education | 2020 |
| Huskrafts Limited | Information & communication | 2015 |
| Hutch Industries Ltd | Construction | 2020 |
| Hydratec Holdings Limited | Financial services | 2024 |
| Hydratec Lift Services Limited | Manufacturing | 1999 |
| I S Homes Ltd | Construction | 2012 |
| Iconic Pools Ltd | Professional & scientific | 2022 |
| Ilogix Computer Solutions Ltd | Other services | 2024 |
| Indigo Earth Limited | Information & communication | 2000 |
| Infotel Systems Limited | Information & communication | 2003 |
| INTEGRATOR-42 Limited | Information & communication | 2024 |
| Interpoint (UK) Limited | Manufacturing | 1988 |
| IPR Delivery Ltd | Professional & scientific | 2010 |
| IQ Stage Solutions Ltd | Information & communication | 2022 |
| J 16 Technologies Limited | Administrative & support | 2005 |
| J L Godsell Limited | Administrative & support | 2007 |
| J P Painting & Decorating Services Limited | Administrative & support | 2017 |
| J.O. Services Limited | Construction | 2003 |
| JBB Family Holdings Limited | Financial services | 2025 |
| JMS Roofing & Property Services Ltd | Construction | 2020 |
| JRSELLERS101 Ltd | Wholesale & retail | 2025 |
| JTC Electrical Installation Ltd | Energy | 2022 |
| Just Learn UK & Ireland Limited | Education | 2025 |
| Jwdvision Ltd | Construction | 2023 |
| K&L Brown Properties Limited | Real estate | 2024 |
| KAL Electrical Contractors Ltd | Construction | 2022 |
| Kassel Consulting Limited | Professional & scientific | 2020 |
| KB Statistics Limited | Information & communication | 2014 |
| KCG Hair Ltd | Other services | 2016 |
| KDR Maintenance Ltd | Real estate | 2026 |
| Keyoko Ltd | Professional & scientific | 2013 |
| Kingfishers (Sandhurst Road) Management Company Limited | Households | 2003 |
| Kingstrom Limited | Extraterritorial | 2006 |
| KK Construction & Property Maintenance Limited | Construction | 2015 |
| KMH Specialists Ltd | Professional & scientific | 2025 |
| Knight School of Dance Limited | Education | 2003 |
| KT Textiles Limited | Wholesale & retail | 2006 |
| L&P Transport & Logistics Ltd | Transport & logistics | 2025 |
| Lala Labels Limited | Wholesale & retail | 2022 |
| Langa Group Ltd | Administrative & support | 2023 |
| Lanovum Ltd | Information & communication | 2025 |
| LCD Limited | Arts & recreation | 2014 |
| Leon Smith Props Ltd | Information & communication | 2022 |
| Lepad Limited | Real estate | 2018 |
| Lepperd Tea and Coffee Company Ltd | Professional & scientific | 2009 |
| LGR Advisory Ltd | Information & communication | 2024 |
| LH Quality Services Ltd | Construction | 2023 |
| LINK5 Limited | Extraterritorial | 2016 |
| Linking Legacy Ltd | Professional & scientific | 2026 |
| Lionheart Hairdressing Ltd | Other services | 2025 |
| Liquidprison Ltd | Information & communication | 2020 |
| Little Croft Engineering Ltd | Manufacturing | 2018 |
| Livealpha Limited | Wholesale & retail | 2017 |
| LIZ MAY Brice Limited | Information & communication | 2026 |
| LM Traditional Builders Ltd | Construction | 2024 |
| LNG Process Solutions Ltd | Professional & scientific | 2019 |
| Lock 24 Limited | Administrative & support | 2004 |
| Lotiss Ltd | Wholesale & retail | 2017 |
| LRC Sales Ltd | Wholesale & retail | 2025 |
| Lumi Space Limited | Professional & scientific | 2018 |
| Luxxe Construction Ltd | Construction | 2017 |
| Lydcross Properties Limited | Real estate | 1970 |
| M and J Transport Limited | Transport & logistics | 2018 |
| M&B Apartments Ltd | Real estate | 2022 |
| M&W Solutions Ltd | Construction | 2023 |
| Madera Bespoke Ltd | Manufacturing | 2025 |
| Maple Leaf Homes Ltd | Real estate | 2023 |
| Marshall & Lucas Limited | Construction | 2017 |
| Matpack Electrical Ltd | Construction | 2012 |
| Maximus Scaffolding Ltd | Construction | 2018 |
| Mayka Home Property Services Limited | Administrative & support | 2010 |
| Mdem Limited | Administrative & support | 2017 |
| Megan Energy Limited | Administrative & support | 2009 |
| Megan Mechanical Services Ltd | Construction | 1997 |
| Megan Renewable Installations Limited | Construction | 2021 |
| Membrive Plumbing & Heating Ltd | Construction | 2017 |
| Memo Kebabs Limited | Hospitality | 2026 |
| Meraki Squared Limited | Professional & scientific | 2024 |
| Mglt Solutions Ltd | Information & communication | 2026 |
| MHC Electrical Ltd | Construction | 2020 |
| Michail Consultancy Ltd | Professional & scientific | 2025 |
| Mines Group Ltd | Manufacturing | 2015 |
| Mining and Metals Research Corporation Ltd | Professional & scientific | 2019 |
| MJM Roofing Limited | Construction | 2007 |