| Halls Enterprises Ltd | Construction | 2019 |
| Hamesmed Limited | Professional & scientific | 2013 |
| Hastings Concierge Ltd | Other services | 2024 |
| Health Advisory Partnerships Limited | Information & communication | 2015 |
| Hedgeland Precision Limited | Administrative & support | 2026 |
| Hernes Oak (Chinnor) Management Company Limited | Real estate | 2008 |
| Hersey Property Maintenance Limited | Construction | 2022 |
| Hf-Eyes Limited | Professional & scientific | 2018 |
| High Heights Roofing Limited | Construction | 2023 |
| Hirst and Wilde Limited | Real estate | 2024 |
| Hissing Duck Music Limited | Information & communication | 2013 |
| Holly Grove Homes (RYE) Limited | Professional & scientific | 2008 |
| Hospitality Display Systems Limited | Information & communication | 2024 |
| House Martin Electrical Ltd | Construction | 2018 |
| Housemartin Electrical & Construction Ltd | Construction | 2023 |
| Humilton Ltd | Wholesale & retail | 2018 |
| Hurford-Green Financial Services Limited | Professional & scientific | 2025 |
| Identifyer Solutions Ltd | Professional & scientific | 2023 |
| IH Bar Operations Ltd | Hospitality | 2021 |
| Illusion Ltd | Construction | 2026 |
| Immutabl Consulting Limited | Professional & scientific | 2023 |
| Immutabl Ltd | Information & communication | 2023 |
| Innerlight Labs Ltd | Information & communication | 2025 |
| Insinia Security Group Limited | Professional & scientific | 2017 |
| Inspectorate Limited | Professional & scientific | 2003 |
| Integral Office Solutions Limited | Construction | 2008 |
| Ionical Limited | Information & communication | 1992 |
| IPI Global Limited | Administrative & support | 1994 |
| IPI Holdings Limited | Financial services | 2005 |
| IPI Ventures Limited | Financial services | 2012 |
| Ipotane Saddlery Ltd | Wholesale & retail | 2017 |
| Iwanek Aviation Ltd | Education | 2024 |
| J M Construction Bespoke Build Limited | Construction | 2014 |
| J Maslen Ltd | Other services | 2005 |
| Jacqui Williams Accountancy Limited | Professional & scientific | 2013 |
| Jafma Management (NDT) Ltd | Professional & scientific | 2018 |
| James Micklem Ltd | Wholesale & retail | 2023 |
| Jansel 1 Management Limited | Real estate | 2012 |
| Jasmine Management Limited | Professional & scientific | 1986 |
| JDW Property Ltd | Administrative & support | 2016 |
| Jhtia Limited | Information & communication | 2025 |
| JK Drainage & Plumbing Ltd | Construction | 2026 |
| JLS Education Ltd | Education | 2013 |
| JLT Group Limited | Professional & scientific | 2024 |
| JM Communications Limited | Information & communication | 2011 |
| JM Project Solutions Limited | Professional & scientific | 2017 |
| JMC Building Limited | Construction | 2017 |
| JOE Orpin International Transport Ltd | Transport & logistics | 2026 |
| Jolly Wholefoods Limited | Wholesale & retail | 2018 |
| Joviel PT Co Ltd | Extraterritorial | 2023 |
| JPS Print Consultants Ltd | Manufacturing | 2001 |
| JR Parties and Events Ltd | Hospitality | 2025 |
| JSN Tree Care Limited | Administrative & support | 2025 |
| JTB Media Ltd | Wholesale & retail | 2025 |
| Julie Sainter Framing Limited | Professional & scientific | 2010 |
| JWP Consultant Ltd | Professional & scientific | 2011 |
| K2 Spice Limited | Professional & scientific | 2015 |
| KHI Media Limited | Professional & scientific | 2024 |
| Kivé Refresh Ltd | Wholesale & retail | 2026 |
| KL Heating and Plumbing Services Limited | Construction | 2025 |
| KOI Enterprises Limited | Manufacturing | 2024 |
| KS Competitions Limited | Wholesale & retail | 2023 |
| Lainey's Curtains Ltd | Manufacturing | 2018 |
| Lamarbell Property Services Ltd | Real estate | 2020 |
| LCM Advisory Ltd | Professional & scientific | 2026 |
| LD Pursuit Ltd | Administrative & support | 2017 |
| LENS2LENS Productions Ltd | Information & communication | 2015 |
| Leonie Limited | Real estate | 1993 |
| Leybourne Park Estates Limited | Real estate | 2000 |
| Leyvmjh Holdings Limited | Financial services | 2021 |
| Lightstone Homes 66 Limited | Construction | 2015 |
| Limehouse Ltd | Health & social care | 2023 |
| Lisa’S Lashes and Beauty Ltd | Other services | 2022 |
| LKJ Consultants Limited | Professional & scientific | 2023 |
| Lost World Adventures Ltd | Administrative & support | 2016 |
| Ludlows of Chinnor Limited | Wholesale & retail | 2025 |
| Lullington Consulting Limited | Professional & scientific | 2017 |
| M a Daly Building Contractors Ltd | Construction | 2001 |
| M&P Scaffolding Services Limited | Construction | 2026 |
| M.F.N & R.E.Tame Limited | Wholesale & retail | 1965 |
| Macantsaoir Capital Partners Limited | Financial services | 2025 |
| Mapaction | Health & social care | 2008 |
| Mapaction Services Limited | Administrative & support | 2008 |
| Matney Interiors Ltd | Construction | 2025 |
| Matthew Day Design Ltd | Construction | 2020 |
| Mattjohn Limited | Construction | 2023 |
| Mcgimpsey Vallis Limited | Construction | 2008 |
| ME & My Bloomers Limited | Other services | 2017 |
| Metaverse Technologies Ltd | Professional & scientific | 2018 |
| Minerva Building Systems Limited | Professional & scientific | 2017 |
| Mito Cleaning Services Limited | Professional & scientific | 2025 |
| MLS Plumbing and Heating Ltd | Construction | 2025 |
| MNS Hotels New Cross Ltd | Hospitality | 2024 |
| Momentum HR Ltd. | Professional & scientific | 2017 |
| Montego Limited | Hospitality | 2022 |
| Motec Auto Services Limited | Wholesale & retail | 2010 |
| Mountain Skills Limited | Arts & recreation | 2001 |
| Mouse to House Ltd | Wholesale & retail | 2020 |
| Mulberry Hedge Limited | Professional & scientific | 2007 |
| Mundies Enterprises Limited | Wholesale & retail | 2017 |