| Carpenters Yard Management Company Limited | Households | 2012 |
| Carter Sustainability Limited | Professional & scientific | 2017 |
| Castle Hill Chicken Limited | Real estate | 2019 |
| CC Costs Consultancy Limited | Administrative & support | 2015 |
| CCM Associates Ltd | Health & social care | 2020 |
| Cedar Tree Holdings Limited | Financial services | 2017 |
| Chafer Racing Developments Ltd | Wholesale & retail | 2022 |
| Chapel Hall Creative C.I.C. | Education | 2023 |
| Chapman Civil Engineering (East Anglia) Ltd | Construction | 2003 |
| Chapmans (UK) Limited | Manufacturing | 1997 |
| Chelsea Banham (Pretraining) Limited | Agriculture & fishing | 2016 |
| Chrismdp Ltd | Professional & scientific | 2025 |
| Church Cottages (Wilby) Limited | Households | 2013 |
| Cititract Ltd | Professional & scientific | 2013 |
| CJ Plumbing and Renovations Limited | Construction | 2022 |
| Clarity Water Solutions Limited | Water & waste | 2016 |
| Classic Landscape Architecture Ltd | Professional & scientific | 2021 |
| Clint Farm Livery Limited | Agriculture & fishing | 2000 |
| Coleysmith Consulting Limited | Professional & scientific | 2004 |
| Colporteur Limited | Information & communication | 2003 |
| Conbeno Ltd. | Information & communication | 2013 |
| Corner Classics & Engineering Limited | Construction | 2023 |
| Corner Line Services Ltd | Real estate | 2019 |
| COY Electrical Limited | Construction | 2019 |
| Cranley Holdings Ltd | Financial services | 2016 |
| Croft Family Holdings Limited | Financial services | 2026 |
| Croft Family Property Limited | Real estate | 2026 |
| Crowthorne and Rose Ltd | Transport & logistics | 2020 |
| CT Tandoor Ltd | Hospitality | 2026 |
| CUD Cooks Ltd | Information & communication | 2025 |
| Custodian Trading Limited | Other services | 1980 |
| Cyber Minds Limited | Information & communication | 2020 |
| D K UK Enterprises Limited | Administrative & support | 2020 |
| D M White Ltd | Construction | 2018 |
| D.A.P. UK Sales Limited | Wholesale & retail | 2016 |
| DAG Architecture Ltd | Professional & scientific | 2025 |
| Daniel Gardens Management Limited | Households | 2001 |
| David J Watkinson Limited | Real estate | 2002 |
| Davinci Food and Wines Limited | Agriculture & fishing | 2008 |
| Deltamech Services Limited | Professional & scientific | 2005 |
| Deluxe Supplements Ltd | Wholesale & retail | 2008 |
| Designed by Hatch Ltd | Manufacturing | 2025 |
| Dicam Technology Ltd. | Information & communication | 1993 |
| Diss Grab Hire Limited | Water & waste | 2017 |
| Diss Lighting TA Brit Light Ltd | Wholesale & retail | 2026 |
| DJE & Associates Limited | Professional & scientific | 2023 |
| DKM Management Ltd | Construction | 2026 |
| DMP Training (UK) Ltd | Education | 2013 |
| Dog DEN Products Ltd. | Wholesale & retail | 2023 |
| Dorothy Martin Limited | Administrative & support | 2016 |
| Dream on CIC | Other services | 2009 |
| Dunne Consultancy Services Ltd | Real estate | 2009 |
| DW & DH Scott Limited | Agriculture & fishing | 2019 |
| DWB Builder Limited | Construction | 2018 |
| DWF Jones Consulting Ltd | Professional & scientific | 2020 |
| EA Leisure Ltd | Arts & recreation | 2025 |
| Easey Farms Limited | Extraterritorial | 2019 |
| East Civils Limited | Construction | 2025 |
| East Living Gislingham Limited | Construction | 2022 |
| East Living Limited | Construction | 2022 |
| East Living Stanton Limited | Construction | 2025 |
| Eclipse Works Ltd | Professional & scientific | 2022 |
| Electra Dynamics Limited | Professional & scientific | 2003 |
| Encompass Environmental Ltd | Transport & logistics | 2006 |
| Epigs Limited | Manufacturing | 2017 |
| Essex Caravan Centre(Wholesale and Retail)Limited | Extraterritorial | 1969 |
| Event Stuff Ltd | Wholesale & retail | 2020 |
| Every Step Equine Assisted Psychotherapy C.I.C. | Health & social care | 2026 |
| Excite Solutions Limited | Construction | 2007 |
| Extra Mile Movers Ltd | Transport & logistics | 2020 |
| EYE Fish and Chips Ltd | Hospitality | 2026 |
| EYE Flooring Limited | Wholesale & retail | 2012 |
| EYE Hair & Beauty Salon Limited | Other services | 2023 |
| EYE Hand Car Wash Ltd | Administrative & support | 2025 |
| EYE MOT Test Centre Ltd | Professional & scientific | 2019 |
| Eyes Open CIC | Arts & recreation | 2012 |
| Eyetech Engineering Limited | Manufacturing | 1987 |
| FAH MAI Holdings Limited | Wholesale & retail | 2017 |
| Fettle Pets Ltd | Wholesale & retail | 2023 |
| Fifty One Fifty Ltd | Professional & scientific | 2018 |
| Filands Contract Furniture Ltd | Wholesale & retail | 2026 |
| Filing Fortress Limited | Transport & logistics | 2014 |
| First Industrial Tyres Limited | Wholesale & retail | 2010 |
| Fishers Grove Land Management Limited | Real estate | 2023 |
| Flach & Le-Roy Limited | Manufacturing | 1993 |
| Flaxmer's Garage Ltd | Real estate | 2021 |
| FLR Investments Limited | Real estate | 2021 |
| Focal Leads Limited | Professional & scientific | 2024 |
| Folly Field Investments Ltd | Agriculture & fishing | 2024 |
| Footprintfun Ltd | Wholesale & retail | 2026 |
| Ford Farms (Suffolk) Limited | Agriculture & fishing | 2009 |
| Form & Field Landscape Architecture Ltd | Professional & scientific | 2026 |
| Foxcard Limited | | 1984 |
| Funeral Training Solutions Limited | Other services | 2017 |
| G&S Property Rentals Limited | Real estate | 2019 |
| Garden Graft Limited | Administrative & support | 2011 |
| Garnham Trees Ltd | Administrative & support | 2024 |
| Garrod Construction Limited | Construction | 2012 |
| Gatelys Ltd | Wholesale & retail | 2026 |
| GE Engineering Ltd | Professional & scientific | 2022 |