| Jayrest Manufacturing Limited | Manufacturing | 2003 |
| Jelux Ltd | Wholesale & retail | 2024 |
| JH Carpentry & Building (EA) Ltd | Construction | 2023 |
| JIM Lawrence Traditional Ironwork Limited | Manufacturing | 1998 |
| JKS Rimkin Limited | Real estate | 2017 |
| JMS Developments Limited | Construction | 2003 |
| JPS European Ltd | Transport & logistics | 2023 |
| JSK Capital Management Ltd | Administrative & support | 2015 |
| JT Travel (Anglia) Ltd | Transport & logistics | 2015 |
| JTA Surveying Services Ltd | Professional & scientific | 2025 |
| Junction 60 Ltd | Wholesale & retail | 2023 |
| Keejays Limited | Manufacturing | 1984 |
| Keewah Limited | Real estate | 2021 |
| Keith Avis Printers Ltd | Manufacturing | 2023 |
| Kersey Freight Limited | Transport & logistics | 2003 |
| Kersey Holdings Limited | Professional & scientific | 2005 |
| Kick Start Wellness CIC | Education | 2024 |
| Kingsmill Cosmetic Preparations Limited | Manufacturing | 1978 |
| Kitchens for Living Ltd | Construction | 2018 |
| Kmtm (GBR) Ltd | Public administration | 2024 |
| KS Invests Ltd | Financial services | 2025 |
| LAI CHI WO Ltd | Information & communication | 2025 |
| Lanesfield Holdings Ltd | Financial services | 2023 |
| Lara Bistro Grill & Bar Ltd | Hospitality | 2026 |
| Lasserton Limited | Construction | 1979 |
| Layham Homes Ltd | Real estate | 2025 |
| Ledgerwood Developments Ltd | Construction | 2022 |
| Ledgerwood Ltd | Construction | 2022 |
| Lendese Commercial Limited | Financial services | 2020 |
| Lewis James Trading Ltd | Wholesale & retail | 2018 |
| Linkpast Ltd | Professional & scientific | 2009 |
| Load&Go Material Recycling Ltd | Water & waste | 2021 |
| Logic MEP Services Ltd | Construction | 2026 |
| Lotties Ventures Ltd | Wholesale & retail | 2022 |
| Love Suds Ltd | Manufacturing | 2023 |
| LP Capital Partners Limited | Professional & scientific | 2020 |
| LRH Cars Ltd | Wholesale & retail | 2023 |
| Luke Chambers Academy Ltd | Education | 2018 |
| Luke Chambers Promotions Limited | Arts & recreation | 2012 |
| M & V Groundworks Ltd | Construction | 2019 |
| M Dixon Excavators Ltd | Construction | 2021 |
| M Faulkner Limited | Construction | 2020 |
| M Ingram Holdings Limited | Financial services | 2025 |
| MAI Logistics Ltd | Transport & logistics | 2024 |
| Mamrfg Limited | Arts & recreation | 2019 |
| Marine Safety Solutions Limited | Manufacturing | 2006 |
| Martyn Hanlon Limited | Professional & scientific | 2025 |
| Mayes Electrical Ltd | Construction | 2023 |
| Melissa Peet Consultancy Services Ltd | Professional & scientific | 2018 |
| Melton Construction Limited | | 1990 |
| MGM Logistics Limited | Transport & logistics | 2015 |
| MID Anglia Aviation Limited | Education | 2017 |
| MLB Landscapes Ltd | Administrative & support | 2020 |
| MRF Burford Services Ltd | Construction | 2023 |
| MSJ Group Limited | Construction | 2020 |
| MTP Invest Limited | Wholesale & retail | 2008 |
| Multicore Contracts Limited | Construction | 2025 |
| Nayland Driving School Ltd | Education | 2019 |
| Nebularo Limited | Administrative & support | 2019 |
| New Start Renovations Ltd | Construction | 2020 |
| Nexsys Cabling Ltd | Construction | 2026 |
| Nordic AV International Limited | Construction | 2025 |
| Nottac Ltd | Financial services | 2024 |
| NPA Engineering Ltd | Professional & scientific | 2018 |
| Oakes Building Services Ltd | Construction | 2024 |
| Obidos Consulting Ltd | Professional & scientific | 2009 |
| Objects of Interest Ltd | Administrative & support | 2023 |
| Obsidian Vehicle Repairs Ltd | Wholesale & retail | 2025 |
| OMG HR Ltd | Professional & scientific | 2020 |
| One & More Ltd | Professional & scientific | 2016 |
| Optimus Coffee & Vending Services Ltd | Professional & scientific | 2013 |
| Orange FOX Consulting Ltd | Information & communication | 2022 |
| Oyster Energy (Ndea) Ltd | Professional & scientific | 2014 |
| P a Consulting Solutions Ltd | Professional & scientific | 2007 |
| Page-Baker Construction Ltd | Construction | 2021 |
| Panda Prop Ltd | Real estate | 2017 |
| Partners in Crime Property Maintenance Ltd | Construction | 2016 |
| Pegasus Refurbishments Ltd | Construction | 2006 |
| Perfection General Builders Ltd | Construction | 2018 |
| Personal Growth Ltd | Extraterritorial | 2014 |
| Phillips Refrigeration Limited | Energy | 2004 |
| Phoenix Travel Contracts Ltd | Transport & logistics | 2015 |
| Phosphene Digital Ltd | Professional & scientific | 2024 |
| Pilgrim Book Services Limited | Information & communication | 1997 |
| Pinnacle Inns Ltd | Hospitality | 2008 |
| Place Farm Developments Ltd | Real estate | 2011 |
| Plant Parts Limited | Wholesale & retail | 1994 |
| Plastercraft East Anglia Limited | Administrative & support | 2013 |
| Pneumac (Hadleigh) Limited | Manufacturing | 1977 |
| Poseidon Solutions Ltd | Construction | 2018 |
| PRAXIS42 Limited | Professional & scientific | 2001 |
| Pritchard Property Maintenance Ltd | Construction | 2016 |
| Project JRW Consultant Limited | Professional & scientific | 2022 |
| Projects 88 Ltd | Real estate | 2026 |
| Provenance 360 Ltd | Real estate | 2025 |
| PROVENANCE365 Limited | Information & communication | 2026 |
| Putwain Properties Ltd | Real estate | 2023 |
| Quantum Business Park Management Company Limited | Households | 2008 |
| Quick Landscapes Ltd | Administrative & support | 2024 |
| Quick Move Property Ltd | Real estate | 2013 |