| Hockley Motors Ltd | Wholesale & retail | 2023 |
| Hockley Padel Ltd | Arts & recreation | 2014 |
| Hockley Project Consulting Limited | Information & communication | 2015 |
| Hockley Property Management Ltd | Real estate | 2024 |
| Hockley Taste Limited | Hospitality | 2017 |
| Horizen Homes Limited | Real estate | 2017 |
| House and Home Improvements Ltd | Real estate | 2023 |
| Hudson Display Services Limited | Manufacturing | 2004 |
| Hull Investment Group Ltd | Real estate | 2026 |
| Hullbridge 1963 Limited | Extraterritorial | 2014 |
| Hunt&Harris Surgery LLP | | 2021 |
| Hunt-Harris&Meads Ltd | Manufacturing | 2025 |
| Hygge Home Care Limited | Construction | 2016 |
| I Don'T Know Ltd | Professional & scientific | 2012 |
| Iaassessors Ltd | Professional & scientific | 2019 |
| Icantbelieveitsglutenfree Ltd | Manufacturing | 2026 |
| Ice Cool Refrigeration and Air Conditioning Ltd | Construction | 2019 |
| Ice Masters Ltd | Administrative & support | 2026 |
| Icehouse Diamonds Ltd | Wholesale & retail | 2022 |
| Iconic Baits Limited | Wholesale & retail | 2021 |
| ICT LEV Ltd | Financial services | 2023 |
| ID Commercial Repairs Ltd | Wholesale & retail | 2025 |
| IG Trussler Limited | Professional & scientific | 2024 |
| IJC Financial Limited | Professional & scientific | 2018 |
| IMP Grips Limited | Professional & scientific | 2018 |
| Instakil Limited | Administrative & support | 2002 |
| International Drama Academy Ltd | Administrative & support | 2017 |
| Ironing Parla Limited | Other services | 2008 |
| Irving Loft Solutions Ltd | Construction | 2022 |
| Itihaas Buildings Limited | Real estate | 2026 |
| Itihaas Resturants Limited | Hospitality | 2026 |
| Izmoll Property Limited | Real estate | 2017 |
| J & M Payroll Services Limited | Administrative & support | 1997 |
| J a M Financial Limited | Administrative & support | 2016 |
| J a Mayhew Ltd | Professional & scientific | 2021 |
| J Brennan Brickwork Limited | Construction | 2011 |
| J.A. Rennell (U.K.) Limited | | 1978 |
| J.D.L Construction (Essex) Ltd | Other services | 2017 |
| J.M.White Carpentry Limited | Manufacturing | 2026 |
| J.W. Wholesale Limited | Wholesale & retail | 2013 |
| J8 Security Services & Property Management Ltd | Real estate | 2023 |
| JA Distributors L.O.S Limited | Wholesale & retail | 2018 |
| Jaac Investments Ltd | Real estate | 2018 |
| James E.Smith (Timber) Limited | Manufacturing | 1983 |
| James-Vinn Ltd | Administrative & support | 2021 |
| JB Electrical (Essex) Ltd | Construction | 2011 |
| Jbmh Group Ltd | Professional & scientific | 2025 |
| JCS Project Management Ltd | Construction | 2018 |
| JD Services and Contractors Ltd | Construction | 2019 |
| JG Building & Roofing Ltd | Construction | 2020 |
| JG Sports & Sounds Ltd | Arts & recreation | 2025 |
| JGP Solutions Ltd | Construction | 2026 |
| JJL Mortgage & Protection Specialists Ltd | Financial services | 2022 |
| JJN Construction Services Limited | Construction | 2020 |
| JK Plumbing and Heating Essex Limited | Professional & scientific | 2016 |
| JK Precious Properties Limited | Real estate | 2025 |
| Jlps-Uk Limited | Extraterritorial | 2021 |
| Jmilesy Media Ltd | Information & communication | 2023 |
| Jmillerentertainment Ltd | Information & communication | 2025 |
| JMR Landscaping Ltd | Other services | 2017 |
| Jnye Limited | Information & communication | 2024 |
| Joch Properties Limited | Real estate | 2015 |
| Johnston Watches Limited | Wholesale & retail | 2016 |
| Jordan Kingswood Limited | Manufacturing | 2019 |
| Joshua Mullin Limited | Education | 2022 |
| JS Fashion Moda Ltd | Wholesale & retail | 2024 |
| JSL Bookkeeping & Accounts Ltd | Professional & scientific | 2010 |
| JTB Mobile Catering Limited | Hospitality | 2023 |
| Jungle Digital Limited | Administrative & support | 2009 |
| Jura Recruitment Limited | Administrative & support | 2019 |
| Just Stairs Ltd | Manufacturing | 2009 |
| K & R Builders Ltd | Wholesale & retail | 2001 |
| K&R Builders Services Limited | Real estate | 2021 |
| Kanesh Limited | Wholesale & retail | 1980 |
| Katarzyna Karwel Limited | Financial services | 2023 |
| KB Children’S Home Ltd | Health & social care | 2025 |
| Kbsolutionz Limited | Health & social care | 2013 |
| KCB Boxing & Fitness Limited | Arts & recreation | 2022 |
| Keal Properties Ltd | Real estate | 2022 |
| Kelby Holdings Limited | Real estate | 2020 |
| Kelly Mech Ltd | Construction | 2018 |
| KH Media Services Ltd | Administrative & support | 2025 |
| Khaylan Enterprises Ltd | Manufacturing | 2010 |
| King & Spry Limited | Construction | 1973 |
| Kirton Properties Limited | Real estate | 1998 |
| KMP Plumbing and Heating Limited | Construction | 2005 |
| Kolt Utilities Ltd | Construction | 2025 |
| Korone Legal Ltd | Information & communication | 2026 |
| Kranbec Solutions Ltd | Professional & scientific | 2024 |
| KSA Recruitment Ltd | Administrative & support | 2013 |
| Kudu Spectrum Ltd | Health & social care | 2013 |
| Kuhlhaus Ltd | Professional & scientific | 2021 |
| L&S Restorations Limited | Other services | 2016 |
| L'Rain Limited | Administrative & support | 2009 |
| L.Hunt&S.Harris Ltd | Professional & scientific | 2025 |
| LAB Media Ltd | Information & communication | 2018 |
| Laburnum Consulting Partners Limited | Financial services | 2019 |
| Landerman Properties Ltd | Real estate | 2022 |
| Landoors Limited | | 1985 |
| Language Heroes Ltd. | Education | 2025 |